YARN (MR2 Included) Properties in CDH 5.1.0
gatewaydefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Deploy Directory | The directory where the client configs will be deployed | /etc/hadoop | client_config_root_dir | true | |
| MapReduce Client Advanced Configuration Snippet (Safety Valve) for mapred-site.xml | For advanced use only, a string to be inserted into the client configuration for mapred-site.xml. | mapreduce_client_config_safety_valve | false | ||
| Gateway Client Environment Advanced Configuration Snippet for hadoop-env.sh (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be inserted into the client configuration for hadoop-env.sh | mapreduce_client_env_safety_valve | false | ||
| Client Java Configuration Options | These are Java command line arguments. Commonly, garbage collection flags or extra debugging flags would be passed here. | -Djava.net.preferIPv4Stack=true | mapreduce_client_java_opts | false | |
| YARN Client Advanced Configuration Snippet (Safety Valve) for yarn-site.xml | For advanced use only, a string to be inserted into the client configuration for yarn-site.xml. | yarn_client_config_safety_valve | false |
Compression
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Compression Level of Codecs | Compression level for the codec used to compress MapReduce outputs. Default compression is a balance between speed and compression ratio. | zlib.compress.level | DEFAULT_COMPRESSION | zlib_compress_level | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Log Event Capture | When set, each role identifies important log events and forwards them to Cloudera Manager. | true | catch_events | false | |
| Enable Configuration Change Alerts | When set, Cloudera Manager will send alerts when this entity's configuration changes. | false | enable_config_alerts | false |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Alternatives Priority | The priority level that the client configuration will have in the Alternatives system on the hosts. Higher priority levels will cause Alternatives to prefer this configuration over any others. | 92 | client_config_priority | true | |
| Client Failover Sleep Base Time | Base sleep time between failover attempts. Used only if RM HA is enabled. | yarn.client.failover-sleep-base-ms | 100 millisecond(s) | client_failover_sleep_base | false |
| Client Failover Sleep Max Time | Maximum sleep time between failover attempts. Used only if RM HA is enabled. | yarn.client.failover-sleep-max-ms | 2 second(s) | client_failover_sleep_max | false |
| Running Job History Location | Location to store the job history files of running jobs. This is a path on the host where the JobTracker is running. | hadoop.job.history.location | /var/log/hadoop-mapreduce/history | hadoop_job_history_dir | false |
| SequenceFile I/O Buffer Size | Size of buffer for read and write operations of SequenceFiles. | io.file.buffer.size | 64 KiB | io_file_buffer_size | false |
| I/O Sort Factor | The number of streams to merge at the same time while sorting files. That is, the number of sort heads to use during the merge sort on the reducer side. This determines the number of open file handles. Merging more files in parallel reduces merge sort iterations and improves run time by eliminating disk I/O. Note that merging more files in parallel uses more memory. If 'io.sort.factor' is set too high or the maximum JVM heap is set too low, excessive garbage collection will occur. The Hadoop default is 10, but Cloudera recommends a higher value. Will be part of generated client configuration. | mapreduce.task.io.sort.factor | 64 | io_sort_factor | false |
| I/O Sort Memory Buffer (MiB) | The total amount of memory buffer, in megabytes, to use while sorting files. Note that this memory comes out of the user JVM heap size (meaning total user JVM heap - this amount of memory = total user usable heap space. Note that Cloudera's default differs from Hadoop's default; Cloudera uses a bigger buffer by default because modern machines often have more RAM. The smallest value across all TaskTrackers will be part of generated client configuration. | mapreduce.task.io.sort.mb | 256 MiB | io_sort_mb | false |
| I/O Sort Spill Percent | The soft limit in either the buffer or record collection buffers. When this limit is reached, a thread will begin to spill the contents to disk in the background. Note that this does not imply any chunking of data to the spill. A value less than 0.5 is not recommended. The syntax is in decimal units; the default is 80% and is formatted 0.8. Will be part of generated client configuration. | mapreduce.map.sort.spill.percent | 0.8 | io_sort_spill_percent | false |
| Use Compression on Map Outputs | If enabled, uses compression on the map outputs before they are sent across the network. Will be part of generated client configuration. | mapreduce.map.output.compress | true | mapred_compress_map_output | false |
| Compression Codec of MapReduce Map Output | For MapReduce map outputs that are compressed, specify the compression codec to use. Will be part of generated client configuration. | mapreduce.map.output.compress.codec | org.apache.hadoop.io.compress.SnappyCodec | mapred_map_output_compression_codec | false |
| Map Tasks Speculative Execution | If enabled, multiple instances of some map tasks may be executed in parallel. | mapreduce.map.speculative | false | mapred_map_tasks_speculative_execution | false |
| Compress MapReduce Job Output | Compress the output of MapReduce jobs. Will be part of generated client configuration. | mapreduce.output.fileoutputformat.compress | false | mapred_output_compress | false |
| Compression Codec of MapReduce Job Output | For MapReduce job outputs that are compressed, specify the compression codec to use. Will be part of generated client configuration. | mapreduce.output.fileoutputformat.compress.codec | org.apache.hadoop.io.compress.DefaultCodec | mapred_output_compression_codec | false |
| Compression Type of MapReduce Job Output | For MapReduce job outputs that are compressed as SequenceFiles, you can select one of these compression type options: NONE, RECORD or BLOCK. Cloudera recommends BLOCK. Will be part of generated client configuration. | mapreduce.output.fileoutputformat.compress.type | BLOCK | mapred_output_compression_type | false |
| Default Number of Parallel Transfers During Shuffle | The default number of parallel transfers run by reduce during the copy (shuffle) phase. This number should be between sqrt(nodes*number_of_map_slots_per_node) and nodes*number_of_map_slots_per_node/2. Will be part of generated client configuration. | mapreduce.reduce.shuffle.parallelcopies | 10 | mapred_reduce_parallel_copies | false |
| Number of Map Tasks to Complete Before Reduce Tasks | Fraction of the number of map tasks in the job which should be completed before reduce tasks are scheduled for the job. | mapreduce.job.reduce.slowstart.completedmaps | 0.8 | mapred_reduce_slowstart_completed_maps | false |
| Default Number of Reduce Tasks per Job | The default number of reduce tasks per job. Will be part of generated client configuration. | mapreduce.job.reduces | 1 | mapred_reduce_tasks | false |
| Reduce Tasks Speculative Execution | If enabled, multiple instances of some reduce tasks may be executed in parallel. | mapreduce.reduce.speculative | false | mapred_reduce_tasks_speculative_execution | false |
| Mapreduce Submit Replication | The replication level for submitted job files. | mapreduce.client.submit.file.replication | 10 | mapred_submit_replication | false |
| Mapreduce Task Timeout | The number of milliseconds before a task will be terminated if it neither reads an input, writes an output, nor updates its status string. | mapreduce.task.timeout | 10 minute(s) | mapred_task_timeout | false |
| MR Application Environment | Additional execution environment entries for map and reduce task processes. | mapreduce.admin.user.env | LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native:$JAVA_LIBRARY_PATH | mapreduce_admin_user_env | false |
| MR Application Classpath | Classpaths to include for MapReduce applications. | mapreduce.application.classpath | $HADOOP_MAPRED_HOME/*, $HADOOP_MAPRED_HOME/lib/*, $MR2_CLASSPATH | mapreduce_application_classpath | false |
| Shared Temp Directories | A shared directory for temporary files. | mapreduce.cluster.temp.dir | mapreduce_cluster_temp_dir | false | |
| Application Framework | The application framework to run jobs with. If not set, jobs will be run with the local job runner. | mapreduce.framework.name | yarn | mapreduce_framework_name | false |
| JobTracker MetaInfo Maxsize | The maximum permissible size of the split metainfo file. The JobTracker won't attempt to read split metainfo files bigger than the configured value. No limits if set to -1. | mapreduce.job.split.metainfo.maxsize | 10000000 | mapreduce_jobtracker_split_metainfo_maxsize | false |
| Map Task Java Opts Base | Java opts for the map processes. The following symbol, if present, will be interpolated: @taskid@ is replaced by current TaskID. Any other occurrences of '@' will go unchanged. For example, to enable verbose gc logging to a file named for the taskid in /tmp pass a value of: "-verbose:gc -Xloggc:/tmp/@taskid@.gc". The configuration variable 'Map Task Memory' can be used to control the maximum memory of the map processes. | mapreduce.map.java.opts | -Djava.net.preferIPv4Stack=true | mapreduce_map_java_opts | false |
| Reduce Task Java Opts Base | Java opts for the reduce processes. The following symbol, if present, will be interpolated: @taskid@ is replaced by current TaskID. Any other occurrences of '@' will go unchanged. For example, to enable verbose gc logging to a file named for the taskid in /tmp pass a value of: "-verbose:gc -Xloggc:/tmp/@taskid@.gc". The configuration variable 'Reduce Task Memory' can be used to control the maximum memory of the reduce processes. | mapreduce.reduce.java.opts | -Djava.net.preferIPv4Stack=true | mapreduce_reduce_java_opts | false |
| Max Shuffle Connections | Maximum allowed connections for the shuffle. Set to 0 (zero) to indicate no limit on the number of connections. | mapreduce.shuffle.max.connections | 80 | mapreduce_shuffle_max_connections | false |
| ApplicationMaster Java Opts Base | Java command line arguments passed to the MapReduce ApplicationMaster. | yarn.app.mapreduce.am.command-opts | -Djava.net.preferIPv4Stack=true | yarn_app_mapreduce_am_command_opts | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Job Counters Limit | Limit on the number of counters allowed per job. | mapreduce.job.counters.max | 120 | mapreduce_job_counters_limit | false |
| Enable Ubertask Optimization | Whether to enable ubertask optimization, which runs "sufficiently small" jobs sequentially within a single JVM. "Small" is defined by the mapreduce.job.ubertask.maxmaps, mapreduce.job.ubertask.maxreduces, and mapreduce.job.ubertask.maxbytes settings. | mapreduce.job.ubertask.enable | false | mapreduce_job_ubertask_enabled | false |
| Ubertask Maximum Job Size | Threshold for number of input bytes, beyond which a job is considered too big for ubertask optimization. If no value is specified, dfs.block.size is used as a default. | mapreduce.job.ubertask.maxbytes | mapreduce_job_ubertask_maxbytes | false | |
| Ubertask Maximum Maps | Threshold for number of maps, beyond which a job is considered too big for ubertask optimization. | mapreduce.job.ubertask.maxmaps | 9 | mapreduce_job_ubertask_maxmaps | false |
| Ubertask Maximum Reduces | Threshold for number of reduces, beyond which a job is considered too big for ubertask optimization. Note: As of CDH 5, MR2 does not support more than one reduce in an ubertask. (Zero is valid.) | mapreduce.job.ubertask.maxreduces | 1 | mapreduce_job_ubertask_maxreduces | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Client Java Heap Size in Bytes | Maximum size in bytes for the Java process heap memory. Passed to Java -Xmx. | 825955249 B | mapreduce_client_java_heapsize | false | |
| Map Task CPU Virtual Cores | The number of virtual CPU cores allocated for each map task of a job. This parameter has no effect prior to CDH 4.4. | mapreduce.map.cpu.vcores | 1 | mapreduce_map_cpu_vcores | false |
| Map Task Maximum Heap Size | The maximum Java heap size, in bytes, of the map processes. This number will be formatted and concatenated with 'Map Task Java Opts Base' to pass to Hadoop. | mapreduce.map.java.opts.max.heap | 825955249 B | mapreduce_map_java_opts_max_heap | false |
| Map Task Memory | The amount of physical memory, in MiB, allocated for each map task of a job. | mapreduce.map.memory.mb | 1 GiB | mapreduce_map_memory_mb | false |
| Reduce Task CPU Virtual Cores | The number of virtual CPU cores for each reduce task of a job. | mapreduce.reduce.cpu.vcores | 1 | mapreduce_reduce_cpu_vcores | false |
| Reduce Task Maximum Heap Size | The maximum Java heap size, in bytes, of the reduce processes. This number will be formatted and concatenated with 'Reduce Task Java Opts Base' to pass to Hadoop. | mapreduce.reduce.java.opts.max.heap | 825955249 B | mapreduce_reduce_java_opts_max_heap | false |
| Reduce Task Memory | The amount of physical memory, in MiB, allocated for each reduce task of a job. This parameter has no effect prior to CDH 4.4. | mapreduce.reduce.memory.mb | 1 GiB | mapreduce_reduce_memory_mb | false |
| ApplicationMaster Java Maximum Heap Size | The maximum heap size, in bytes, of the Java MapReduce ApplicationMaster. This number will be formatted and concatenated with 'ApplicationMaster Java Opts Base' to pass to Hadoop. | 825955249 B | yarn_app_mapreduce_am_max_heap | false | |
| ApplicationMaster Virtual CPU Cores | The virtual CPU cores requirement, for the ApplicationMaster. This parameter has no effect prior to CDH 4.4. | yarn.app.mapreduce.am.resource.cpu-vcores | 1 | yarn_app_mapreduce_am_resource_cpu_vcores | false |
| ApplicationMaster Memory | The physical memory requirement, in MiB, for the ApplicationMaster. | yarn.app.mapreduce.am.resource.mb | 1 GiB | yarn_app_mapreduce_am_resource_mb | false |
jobhistoryserverdefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| System Group | The group that the JobHistory Server process should run as. | hadoop | history_process_groupname | true | |
| System User | The user that the JobHistory Server process should run as. | mapred | history_process_username | true | |
| JobHistory Server Advanced Configuration Snippet (Safety Valve) for yarn-site.xml | For advanced use only, a string to be inserted into yarn-site.xml for this role only. | jobhistory_config_safety_valve | false | ||
| JobHistory Server Advanced Configuration Snippet (Safety Valve) for mapred-site.xml | For advanced use only, a string to be inserted into mapred-site.xml for this role only. | jobhistory_mapred_safety_valve | false | ||
| JobHistory Server Logging Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into log4j.properties for this role only. | log4j_safety_valve | false | ||
| Java Configuration Options for JobHistory Server | These arguments will be passed as part of the Java command line. Commonly, garbage collection flags or extra debugging flags would be passed here. | -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:-CMSConcurrentMTEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled | mr2_jobhistory_java_opts | false | |
| Heap Dump Directory | Path to directory where heap dumps are generated when java.lang.OutOfMemoryError error is thrown. This directory is automatically created if it doesn't exist. However, if this directory already exists, role user must have write access to this directory. If this directory is shared amongst multiple roles, it should have 1777 permissions. Note that the heap dump files are created with 600 permissions and are owned by the role user. The amount of free space in this directory should be greater than the maximum Java Process heap size configured for this role. | /tmp | oom_heap_dump_dir | false | |
| Dump Heap When Out of Memory | When set, generates heap dump file when java.lang.OutOfMemoryError is thrown. | false | oom_heap_dump_enabled | true | |
| Kill When Out of Memory | When set, a SIGKILL signal is sent to the role process when java.lang.OutOfMemoryError is thrown. | true | oom_sigkill_enabled | true | |
| Automatically Restart Process | When set, this role's process is automatically (and transparently) restarted in the event of an unexpected failure. | false | process_auto_restart | true |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| JobHistory Server Logging Threshold | The minimum log level for JobHistory Server logs | INFO | log_threshold | false | |
| JobHistory Server Maximum Log File Backups | The maximum number of rolled log files to keep for JobHistory Server logs. Typically used by log4j. | 10 | max_log_backup_index | false | |
| JobHistory Server Max Log Size | The maximum size, in megabytes, per log file for JobHistory Server logs. Typically used by log4j. | 200 MiB | max_log_size | false | |
| JobHistory Server Log Directory | Directory where JobHistory Server will place its log files. | hadoop.log.dir | /var/log/hadoop-mapreduce | mr2_jobhistory_log_dir | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Health Alerts for this Role | When set, Cloudera Manager will send alerts when the health of this role reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold | true | enable_alerts | false | |
| Enable Configuration Change Alerts | When set, Cloudera Manager will send alerts when this entity's configuration changes. | false | enable_config_alerts | false | |
| File Descriptor Monitoring Thresholds | The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit. | Warning: 50.0 %, Critical: 70.0 % | jobhistory_fd_thresholds | false | |
| Garbage Collection Duration Thresholds | The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time. | Warning: 30.0, Critical: 60.0 | jobhistory_gc_duration_thresholds | false | |
| Garbage Collection Duration Monitoring Period | The period to review when computing the moving average of garbage collection time. | 5 minute(s) | jobhistory_gc_duration_window | false | |
| JobHistory Server Host Health Test | When computing the overall JobHistory Server health, consider the host's health. | true | jobhistory_host_health_enabled | false | |
| JobHistory Server Process Health Test | Enables the health test that the JobHistory Server's process state is consistent with the role configuration | true | jobhistory_scm_health_enabled | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | jobhistory_web_metric_collection_enabled | false | |
| Web Metric Collection Duration | The health test thresholds on the duration of the metrics request to the web server. | Warning: 10 second(s), Critical: Never | jobhistory_web_metric_collection_thresholds | false | |
| Log Directory Free Space Monitoring Absolute Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. | Warning: 10 GiB, Critical: 5 GiB | log_directory_free_space_absolute_thresholds | false | |
| Log Directory Free Space Monitoring Percentage Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Log Directory Free Space Monitoring Absolute Thresholds setting is configured. | Warning: Never, Critical: Never | log_directory_free_space_percentage_thresholds | false | |
| Rules to Extract Events from Log Files | This file contains the rules which govern how log messages are turned into events by the custom log4j appender that this role loads.
It is in JSON format, and is composed of a list of rules. Every log message is evaluated against each of these rules in turn to decide whether or not to send an event for that message. Each rule has
some or all of the following fields:
|
version: 0, rules: [ alert: false, rate: 1, periodminutes: 1, threshold:FATAL, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Instead, use .*, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Use .* instead, alert: false, rate: 1, periodminutes: 2, exceptiontype: .*, alert: false, rate: 1, periodminutes: 1, threshold:WARN ] | log_event_whitelist | false | |
| Role Triggers | The configured triggers for this role. This is a JSON formatted list of triggers. These triggers are evaluated as part as the health
system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed. Each trigger has all of the following fields:
|
[] | role_triggers | true | |
| Unexpected Exits Thresholds | The health test thresholds for unexpected exits encountered within a recent period specified by the unexpected_exits_window configuration for the role. | Warning: Never, Critical: Any | unexpected_exits_thresholds | false | |
| Unexpected Exits Monitoring Period | The period to review when computing unexpected exits. | 5 minute(s) | unexpected_exits_window | false |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Job History Files Cleaner Interval | Time interval for history cleaner to check for files to delete. Files are only deleted if they are older than mapreduce.jobhistory.max-age-ms. | mapreduce.jobhistory.cleaner.interval | 1 day(s) | mapreduce_jobhistory_cleaner_interval | false |
| Job History Files Maximum Age | Job history files older than this time duration will deleted when the history cleaner runs. | mapreduce.jobhistory.max-age-ms | 7 day(s) | mapreduce_jobhistory_max_age_ms | false |
| MapReduce ApplicationMaster Staging Root Directory | The root HDFS directory of the staging area for users' MR2 jobs; for example /user. The staging directories are always named after the user. | yarn.app.mapreduce.am.staging-dir | /user | yarn_app_mapreduce_am_staging_dir | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Maximum Process File Descriptors | If configured, overrides the process soft and hard rlimits (also called ulimits) for file descriptors to the configured value. | rlimit_fds | false |
Ports and Addresses
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| MapReduce JobHistory Server Port | The port of the MapReduce JobHistory Server. Together with the host name of the JobHistory role forms the address. | mapreduce.jobhistory.address | 10020 | mapreduce_jobhistory_address | false |
| MapReduce JobHistory Server Admin Interface Port | The port of the MapReduce JobHistory Server administrative interface. Together with the host name of the JobHistory role forms the address. | mapreduce.jobhistory.admin.address | 10033 | mapreduce_jobhistory_admin_address | false |
| MapReduce JobHistory Web Application HTTP Port | The HTTP port of the MapReduce JobHistory Server web application. Together with the host name of the JobHistory role forms the address. | mapreduce.jobhistory.webapp.address | 19888 | mapreduce_jobhistory_webapp_address | false |
| MapReduce JobHistory Web Application HTTPS Port (SSL) | The HTTPS port of the MapReduce JobHistory Server web application. Together with the host name of the JobHistory role forms the address. | mapreduce.jobhistory.webapp.https.address | 19890 | mapreduce_jobhistory_webapp_https_address | false |
| Bind JobHistory Server to Wildcard Address | If enabled, the JobHistory Server binds to the wildcard address ("0.0.0.0") on all of its ports. | false | yarn_jobhistory_bind_wildcard | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Java Heap Size of JobHistory Server in Bytes | Maximum size in bytes for the Java Process heap memory. Passed to Java -Xmx. | 1 GiB | mr2_jobhistory_java_heapsize | false | |
| Cgroup CPU Shares | Number of CPU shares to assign to this role. The greater the number of shares, the larger the share of the host's CPUs that will be given to this role when the host experiences CPU contention. Must be between 2 and 262144. Defaults to 1024 for processes not managed by Cloudera Manager. | cpu.shares | 1024 | rm_cpu_shares | true |
| Cgroup I/O Weight | Weight for the read I/O requests issued by this role. The greater the weight, the higher the priority of the requests when the host experiences I/O contention. Must be between 100 and 1000. Defaults to 1000 for processes not managed by Cloudera Manager. | blkio.weight | 500 | rm_io_weight | true |
| Cgroup Memory Hard Limit | Hard memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.limit_in_bytes | -1 MiB | rm_memory_hard_limit | true |
| Cgroup Memory Soft Limit | Soft memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process if and only if the host is facing memory pressure. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.soft_limit_in_bytes | -1 MiB | rm_memory_soft_limit | true |
Stacks Collection
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Stacks Collection Data Retention | The amount of stacks data that will be retained. After the retention limit is reached, the oldest data will be deleted. | stacks_collection_data_retention | 100 MiB | stacks_collection_data_retention | false |
| Stacks Collection Directory | The directory in which stacks logs will be placed. If not set, stacks will be logged into a stacks subdirectory of the role's log directory. | stacks_collection_directory | stacks_collection_directory | false | |
| Stacks Collection Enabled | Whether or not periodic stacks collection is enabled. | stacks_collection_enabled | false | stacks_collection_enabled | true |
| Stacks Collection Frequency | The frequency with which stacks will be collected. | stacks_collection_frequency | 5.0 second(s) | stacks_collection_frequency | false |
| Stacks Collection Method | The method that will be used to collect stacks. The jstack option involves periodically running the jstack command against the role's daemon process. The servlet method is available for those roles that have an HTTP server endpoint exposing the current stacks traces of all threads. When the servlet method is selected that HTTP endpoint is periodically scraped. | stacks_collection_method | jstack | stacks_collection_method | false |
nodemanagerdefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Hadoop Metrics2 Advanced Configuration Snippet (Safety Valve) | Advanced Configuration Snippet (Safety Valve) for Hadoop Metrics2. Properties will be inserted into hadoop-metrics2.properties. | hadoop_metrics2_safety_valve | false | ||
| CGroups Hierarchy | Path (rooted in the cgroups hierarchy on the machine) where to place YARN-managed cgroups. | yarn.nodemanager.linux-container-executor.cgroups.hierarchy | /hadoop-yarn | linux_container_executor_cgroups_hierarchy | false |
| NodeManager Logging Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into log4j.properties for this role only. | log4j_safety_valve | false | ||
| Healthchecker Script Arguments | Comma-separated list of arguments which are to be passed to node health script when it is being launched. | yarn.nodemanager.health-checker.script.opts | mapred_healthchecker_script_args | false | |
| Healthchecker Script Path | Absolute path to the script which is periodically run by the node health monitoring service to determine if the node is healthy or not. If the value of this key is empty or the file does not exist in the location configured here, the node health monitoring service is not started. | yarn.nodemanager.health-checker.script.path | mapred_healthchecker_script_path | false | |
| Java Configuration Options for NodeManager | These arguments will be passed as part of the Java command line. Commonly, garbage collection flags or extra debugging flags would be passed here. | -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:-CMSConcurrentMTEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled | node_manager_java_opts | false | |
| NodeManager Advanced Configuration Snippet (Safety Valve) for yarn-site.xml | For advanced use only, a string to be inserted into yarn-site.xml for this role only. | nodemanager_config_safety_valve | false | ||
| NodeManager Advanced Configuration Snippet (Safety Valve) for mapred-site.xml | For advanced use only, a string to be inserted into mapred-site.xml for this role only. | nodemanager_mapred_safety_valve | false | ||
| Heap Dump Directory | Path to directory where heap dumps are generated when java.lang.OutOfMemoryError error is thrown. This directory is automatically created if it doesn't exist. However, if this directory already exists, role user must have write access to this directory. If this directory is shared amongst multiple roles, it should have 1777 permissions. Note that the heap dump files are created with 600 permissions and are owned by the role user. The amount of free space in this directory should be greater than the maximum Java Process heap size configured for this role. | /tmp | oom_heap_dump_dir | false | |
| Dump Heap When Out of Memory | When set, generates heap dump file when java.lang.OutOfMemoryError is thrown. | false | oom_heap_dump_enabled | true | |
| Kill When Out of Memory | When set, a SIGKILL signal is sent to the role process when java.lang.OutOfMemoryError is thrown. | true | oom_sigkill_enabled | true | |
| Automatically Restart Process | When set, this role's process is automatically (and transparently) restarted in the event of an unexpected failure. | true | process_auto_restart | true | |
| Localized Dir Deletion Delay | Number of seconds after an application finishes before the NodeManager's DeletionService will delete the application's localized file and log directory. To diagnose YARN application problems, set this property's value large enough (for example, to 600 = 10 minutes) to permit examination of these directories. | yarn.nodemanager.delete.debug-delay-sec | 0 | yarn_nodemanager_delete_debug_delay_sec | false |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| NodeManager Logging Threshold | The minimum log level for NodeManager logs | INFO | log_threshold | false | |
| NodeManager Maximum Log File Backups | The maximum number of rolled log files to keep for NodeManager logs. Typically used by log4j. | 10 | max_log_backup_index | false | |
| NodeManager Max Log Size | The maximum size, in megabytes, per log file for NodeManager logs. Typically used by log4j. | 200 MiB | max_log_size | false | |
| NodeManager Log Directory | Directory where NodeManager will place its log files. | hadoop.log.dir | /var/log/hadoop-yarn | node_manager_log_dir | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Health Alerts for this Role | When set, Cloudera Manager will send alerts when the health of this role reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold | true | enable_alerts | false | |
| Enable Configuration Change Alerts | When set, Cloudera Manager will send alerts when this entity's configuration changes. | false | enable_config_alerts | false | |
| Log Directory Free Space Monitoring Absolute Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. | Warning: 10 GiB, Critical: 5 GiB | log_directory_free_space_absolute_thresholds | false | |
| Log Directory Free Space Monitoring Percentage Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Log Directory Free Space Monitoring Absolute Thresholds setting is configured. | Warning: Never, Critical: Never | log_directory_free_space_percentage_thresholds | false | |
| Rules to Extract Events from Log Files | This file contains the rules which govern how log messages are turned into events by the custom log4j appender that this role loads.
It is in JSON format, and is composed of a list of rules. Every log message is evaluated against each of these rules in turn to decide whether or not to send an event for that message. Each rule has
some or all of the following fields:
|
version: 0, rules: [ alert: false, rate: 1, periodminutes: 1, threshold:FATAL, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Instead, use .*, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Use .* instead, alert: false, rate: 1, periodminutes: 2, exceptiontype: .*, alert: false, rate: 1, periodminutes: 1, threshold:WARN ] | log_event_whitelist | false | |
| NodeManager Connectivity Health Check | Enables the health check that verifies the NodeManager is connected to the ResourceManager | true | nodemanager_connectivity_health_enabled | false | |
| NodeManager Connectivity Tolerance at Startup | The amount of time to wait for the NodeManager to fully start up and connect to the ResourceManager before enforcing the connectivity check. | 3 minute(s) | nodemanager_connectivity_tolerance_seconds | false | |
| File Descriptor Monitoring Thresholds | The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit. | Warning: 50.0 %, Critical: 70.0 % | nodemanager_fd_thresholds | false | |
| Garbage Collection Duration Thresholds | The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time. | Warning: 30.0, Critical: 60.0 | nodemanager_gc_duration_thresholds | false | |
| Garbage Collection Duration Monitoring Period | The period to review when computing the moving average of garbage collection time. | 5 minute(s) | nodemanager_gc_duration_window | false | |
| NodeManager Host Health Test | When computing the overall NodeManager health, consider the host's health. | true | nodemanager_host_health_enabled | false | |
| NodeManager Process Health Test | Enables the health test that the NodeManager's process state is consistent with the role configuration | true | nodemanager_scm_health_enabled | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | nodemanager_web_metric_collection_enabled | false | |
| Web Metric Collection Duration | The health test thresholds on the duration of the metrics request to the web server. | Warning: 10 second(s), Critical: Never | nodemanager_web_metric_collection_thresholds | false | |
| Role Triggers | The configured triggers for this role. This is a JSON formatted list of triggers. These triggers are evaluated as part as the health
system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed. Each trigger has all of the following fields:
|
[] | role_triggers | true | |
| Unexpected Exits Thresholds | The health test thresholds for unexpected exits encountered within a recent period specified by the unexpected_exits_window configuration for the role. | Warning: Never, Critical: Any | unexpected_exits_thresholds | false | |
| Unexpected Exits Monitoring Period | The period to review when computing unexpected exits. | 5 minute(s) | unexpected_exits_window | false |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Shuffle Auxiliary Service | If enabled, adds 'org.apache.hadoop.mapred.ShuffleHandler' to the NodeManager auxiliary services. This is required for MapReduce applications. | true | mapreduce_aux_service | false | |
| Containers Environment Variable | Environment variables that should be forwarded from the NodeManager's environment to the container's. | yarn.nodemanager.admin-env | MALLOC_ARENA_MAX=$MALLOC_ARENA_MAX | yarn_nodemanager_admin_env | false |
| Container Manager Thread Count | Number of threads container manager uses. | yarn.nodemanager.container-manager.thread-count | 20 | yarn_nodemanager_container_manager_thread_count | false |
| Cleanup Thread Count | Number of threads used in cleanup. | yarn.nodemanager.delete.thread-count | 4 | yarn_nodemanager_delete_thread_count | false |
| Containers Environment Variables Whitelist | Environment variables that containers may override rather than use NodeManager's default. | yarn.nodemanager.env-whitelist | JAVA_HOME, HADOOP_COMMON_HOME, HADOOP_HDFS_HOME, HADOOP_CONF_DIR, HADOOP_YARN_HOME | yarn_nodemanager_env_whitelist | false |
| Heartbeat Interval | Heartbeat interval to ResourceManager | yarn.resourcemanager.nodemanagers.heartbeat-interval-ms | 1 second(s) | yarn_nodemanager_heartbeat_interval_ms | false |
| NodeManager Local Directory List | List of directories on the local filesystem where a NodeManager stores intermediate data files. | yarn.nodemanager.local-dirs | yarn_nodemanager_local_dirs | true | |
| Localizer Cache Cleanup Interval | Address where the localizer IPC is. | yarn.nodemanager.localizer.cache.cleanup.interval-ms | 10 minute(s) | yarn_nodemanager_localizer_cache_cleanup_interval_ms | false |
| Localizer Cache Target Size | Target size of localizer cache in MB, per local directory. | yarn.nodemanager.localizer.cache.target-size-mb | 10 GiB | yarn_nodemanager_localizer_cache_target_size_mb | false |
| Localizer Client Thread Count | Number of threads to handle localization requests. | yarn.nodemanager.localizer.client.thread-count | 5 | yarn_nodemanager_localizer_client_thread_count | false |
| Localizer Fetch Thread Count | Number of threads to use for localization fetching. | yarn.nodemanager.localizer.fetch.thread-count | 4 | yarn_nodemanager_localizer_fetch_thread_count | false |
| NodeManager Container Log Directories | List of directories on the local filesystem where a NodeManager stores container log files. | yarn.nodemanager.log-dirs | /var/log/hadoop-yarn/container | yarn_nodemanager_log_dirs | true |
| Log Retain Duration | Time in seconds to retain user logs. Only applicable if log aggregation is disabled. | yarn.nodemanager.log.retain-seconds | 3 hour(s) | yarn_nodemanager_log_retain_seconds | false |
| Remote App Log Directory | HDFS directory where application logs are stored when an application completes. | yarn.nodemanager.remote-app-log-dir | /tmp/logs | yarn_nodemanager_remote_app_log_dir | false |
| Remote App Log Directory Suffix | The remote log dir will be created at {yarn.nodemanager.remote-app-log-dir}/${user}/{thisParam} | yarn.nodemanager.remote-app-log-dir-suffix | logs | yarn_nodemanager_remote_app_log_dir_suffix | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Maximum Process File Descriptors | If configured, overrides the process soft and hard rlimits (also called ulimits) for file descriptors to the configured value. | rlimit_fds | false |
Ports and Addresses
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| NodeManager Web Application HTTPS Port (SSL) | The HTTPS port of the NodeManager web application. | yarn.nodemanager.webapp.https.address | 8044 | nodemanager_webserver_https_port | false |
| NodeManager Web Application HTTP Port | The HTTP Port of the NodeManager web application. | yarn.nodemanager.webapp.address | 8042 | nodemanager_webserver_port | false |
| NodeManager IPC Address | The address of the NodeManager IPC. | yarn.nodemanager.address | 8041 | yarn_nodemanager_address | false |
| Localizer Port | Address where the localizer IPC is. | yarn.nodemanager.localizer.address | 8040 | yarn_nodemanager_localizer_address | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Java Heap Size of NodeManager in Bytes | Maximum size in bytes for the Java Process heap memory. Passed to Java -Xmx. | 1 GiB | node_manager_java_heapsize | false | |
| Cgroup CPU Shares | Number of CPU shares to assign to this role. The greater the number of shares, the larger the share of the host's CPUs that will be given to this role when the host experiences CPU contention. Must be between 2 and 262144. Defaults to 1024 for processes not managed by Cloudera Manager. | cpu.shares | 1024 | rm_cpu_shares | true |
| Cgroup I/O Weight | Weight for the read I/O requests issued by this role. The greater the weight, the higher the priority of the requests when the host experiences I/O contention. Must be between 100 and 1000. Defaults to 1000 for processes not managed by Cloudera Manager. | blkio.weight | 500 | rm_io_weight | true |
| Cgroup Memory Hard Limit | Hard memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.limit_in_bytes | -1 MiB | rm_memory_hard_limit | true |
| Cgroup Memory Soft Limit | Soft memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process if and only if the host is facing memory pressure. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.soft_limit_in_bytes | -1 MiB | rm_memory_soft_limit | true |
| Container Virtual CPU Cores | Number of virtual CPU cores that can be allocated for containers. This parameter has no effect prior to CDH 4.4. | yarn.nodemanager.resource.cpu-vcores | 8 | yarn_nodemanager_resource_cpu_vcores | true |
| Container Memory | Amount of physical memory, in MiB, that can be allocated for containers. | yarn.nodemanager.resource.memory-mb | 8 GiB | yarn_nodemanager_resource_memory_mb | true |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Allowed System Users | List of users explicitly whitelisted to be allowed to run containers. Users with IDs lower than the "Minimum User Id" setting may be whitelisted by using this setting. | allowed.system.users | nobody, impala, hive, llama | container_executor_allowed_system_users | false |
| Container Executor Group | The system group that owns the container-executor binary. This does not need to be changed unless the ownership of the binary is explicitly changed. | yarn.nodemanager.linux-container-executor.group | yarn | container_executor_group | false |
| Minimum User ID | The minimum Linux user ID allowed. Used to prevent other super users. | min.user.id | 1000 | container_executor_min_user_id | false |
Stacks Collection
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Stacks Collection Data Retention | The amount of stacks data that will be retained. After the retention limit is reached, the oldest data will be deleted. | stacks_collection_data_retention | 100 MiB | stacks_collection_data_retention | false |
| Stacks Collection Directory | The directory in which stacks logs will be placed. If not set, stacks will be logged into a stacks subdirectory of the role's log directory. | stacks_collection_directory | stacks_collection_directory | false | |
| Stacks Collection Enabled | Whether or not periodic stacks collection is enabled. | stacks_collection_enabled | false | stacks_collection_enabled | true |
| Stacks Collection Frequency | The frequency with which stacks will be collected. | stacks_collection_frequency | 5.0 second(s) | stacks_collection_frequency | false |
| Stacks Collection Method | The method that will be used to collect stacks. The jstack option involves periodically running the jstack command against the role's daemon process. The servlet method is available for those roles that have an HTTP server endpoint exposing the current stacks traces of all threads. When the servlet method is selected that HTTP endpoint is periodically scraped. | stacks_collection_method | jstack | stacks_collection_method | false |
resourcemanagerdefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Hadoop Metrics2 Advanced Configuration Snippet (Safety Valve) | Advanced Configuration Snippet (Safety Valve) for Hadoop Metrics2. Properties will be inserted into hadoop-metrics2.properties. | hadoop_metrics2_safety_valve | false | ||
| ResourceManager Logging Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into log4j.properties for this role only. | log4j_safety_valve | false | ||
| Heap Dump Directory | Path to directory where heap dumps are generated when java.lang.OutOfMemoryError error is thrown. This directory is automatically created if it doesn't exist. However, if this directory already exists, role user must have write access to this directory. If this directory is shared amongst multiple roles, it should have 1777 permissions. Note that the heap dump files are created with 600 permissions and are owned by the role user. The amount of free space in this directory should be greater than the maximum Java Process heap size configured for this role. | /tmp | oom_heap_dump_dir | false | |
| Dump Heap When Out of Memory | When set, generates heap dump file when java.lang.OutOfMemoryError is thrown. | false | oom_heap_dump_enabled | true | |
| Kill When Out of Memory | When set, a SIGKILL signal is sent to the role process when java.lang.OutOfMemoryError is thrown. | true | oom_sigkill_enabled | true | |
| Automatically Restart Process | When set, this role's process is automatically (and transparently) restarted in the event of an unexpected failure. | false | process_auto_restart | true | |
| Java Configuration Options for ResourceManager | These arguments will be passed as part of the Java command line. Commonly, garbage collection flags or extra debugging flags would be passed here. | -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:-CMSConcurrentMTEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled | resource_manager_java_opts | false | |
| ResourceManager Advanced Configuration Snippet (Safety Valve) for yarn-site.xml | For advanced use only, a string to be inserted into yarn-site.xml for this role only. | resourcemanager_config_safety_valve | false | ||
| ResourceManager Advanced Configuration Snippet (Safety Valve) for mapred-site.xml | For advanced use only, a string to be inserted into mapred-site.xml for this role only. | resourcemanager_mapred_safety_valve | false | ||
| ResourceManager Advanced Configuration Snippet (Safety Valve) for nodes_allow.txt | For advanced use only, a string to be inserted into nodes_allow.txt for this role only. | rm_hosts_allow_safety_valve | false | ||
| ResourceManager Advanced Configuration Snippet (Safety Valve) for nodes_exclude.txt | For advanced use only, a string to be inserted into nodes_exclude.txt for this role only. | rm_hosts_exclude_safety_valve | false |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| ResourceManager Logging Threshold | The minimum log level for ResourceManager logs | INFO | log_threshold | false | |
| ResourceManager Maximum Log File Backups | The maximum number of rolled log files to keep for ResourceManager logs. Typically used by log4j. | 10 | max_log_backup_index | false | |
| ResourceManager Max Log Size | The maximum size, in megabytes, per log file for ResourceManager logs. Typically used by log4j. | 200 MiB | max_log_size | false | |
| ResourceManager Log Directory | Directory where ResourceManager will place its log files. | hadoop.log.dir | /var/log/hadoop-yarn | resource_manager_log_dir | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Health Alerts for this Role | When set, Cloudera Manager will send alerts when the health of this role reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold | true | enable_alerts | false | |
| Enable Configuration Change Alerts | When set, Cloudera Manager will send alerts when this entity's configuration changes. | false | enable_config_alerts | false | |
| Log Directory Free Space Monitoring Absolute Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. | Warning: 10 GiB, Critical: 5 GiB | log_directory_free_space_absolute_thresholds | false | |
| Log Directory Free Space Monitoring Percentage Thresholds | The health test thresholds for monitoring of free space on the filesystem that contains this role's log directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Log Directory Free Space Monitoring Absolute Thresholds setting is configured. | Warning: Never, Critical: Never | log_directory_free_space_percentage_thresholds | false | |
| Rules to Extract Events from Log Files | This file contains the rules which govern how log messages are turned into events by the custom log4j appender that this role loads.
It is in JSON format, and is composed of a list of rules. Every log message is evaluated against each of these rules in turn to decide whether or not to send an event for that message. Each rule has
some or all of the following fields:
|
version: 0, rules: [ alert: false, rate: 1, periodminutes: 1, threshold:FATAL, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Instead, use .*, alert: false, rate: 0, threshold:WARN, content: .* is deprecated. Use .* instead, alert: false, rate: 1, periodminutes: 2, exceptiontype: .*, alert: false, rate: 1, periodminutes: 1, threshold:WARN ] | log_event_whitelist | false | |
| File Descriptor Monitoring Thresholds | The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit. | Warning: 50.0 %, Critical: 70.0 % | resourcemanager_fd_thresholds | false | |
| Garbage Collection Duration Thresholds | The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time. | Warning: 30.0, Critical: 60.0 | resourcemanager_gc_duration_thresholds | false | |
| Garbage Collection Duration Monitoring Period | The period to review when computing the moving average of garbage collection time. | 5 minute(s) | resourcemanager_gc_duration_window | false | |
| ResourceManager Host Health Test | When computing the overall ResourceManager health, consider the host's health. | true | resourcemanager_host_health_enabled | false | |
| ResourceManager Process Health Test | Enables the health test that the ResourceManager's process state is consistent with the role configuration | true | resourcemanager_scm_health_enabled | false | |
| Health Check Startup Tolerance | The amount of time allowed after this role is started that failures of health checks that rely on communication with this role will be tolerated. | 5 minute(s) | resourcemanager_startup_tolerance_minutes | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | resourcemanager_web_metric_collection_enabled | false | |
| Web Metric Collection Duration | The health test thresholds on the duration of the metrics request to the web server. | Warning: 10 second(s), Critical: Never | resourcemanager_web_metric_collection_thresholds | false | |
| Role Triggers | The configured triggers for this role. This is a JSON formatted list of triggers. These triggers are evaluated as part as the health
system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed. Each trigger has all of the following fields:
|
[] | role_triggers | true | |
| Unexpected Exits Thresholds | The health test thresholds for unexpected exits encountered within a recent period specified by the unexpected_exits_window configuration for the role. | Warning: Never, Critical: Any | unexpected_exits_thresholds | false | |
| Unexpected Exits Monitoring Period | The period to review when computing unexpected exits. | 5 minute(s) | unexpected_exits_window | false |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Capacity Scheduler Configuration | Enter an XML string that represents the Capacity Scheduler configuration. | <?xml version=1.0?> <configuration> <property> <name>yarn.scheduler.capacity.root.queues</name> <value>default</value> </property> <property> <name>yarn.scheduler.capacity.root.capacity</name> <value>100</value> </property> <property> <name>yarn.scheduler.capacity.root.default.capacity</name> <value>100</value> </property> </configuration> | resourcemanager_capacity_scheduler_configuration | true | |
| Fair Scheduler Assign Multiple Tasks | Enables multiple Fair Scheduler container assignments in one heartbeat, which improves cluster throughput when there are many small tasks to run. | yarn.scheduler.fair.assignmultiple | false | resourcemanager_fair_scheduler_assign_multiple | true |
| Fair Scheduler XML Advanced Configuration Snippet (Safety Valve) | An XML string that will be inserted verbatim into the Fair Scheduler allocations file. For CDH5, overrides the configuration set using the Pools configuration UI. For CDH4, this is the only way to configure the Fair Scheduler for YARN. | resourcemanager_fair_scheduler_configuration | false | ||
| Fair Scheduler Preemption | When enabled, if a pool's minimum share is not met for some period of time, the Fair Scheduler preempts applications in other pools. Preemption guarantees that production applications are not starved while also allowing the cluster to be used for experimental and research applications. To minimize wasted computation, the Fair Scheduler preempts the most recently launched applications. | yarn.scheduler.fair.preemption | false | resourcemanager_fair_scheduler_preemption | true |
| Fair Scheduler Size-Based Weight | When enabled, the Fair Scheduler will assign shares to individual apps based on their size, rather than providing an equal share to all apps regardless of size. | yarn.scheduler.fair.sizebasedweight | false | resourcemanager_fair_scheduler_size_based_weight | true |
| Fair Scheduler User As Default Queue | When set to true, the Fair Scheduler uses the username as the default pool name, in the event that a pool name is not specified. When set to false, all applications are run in a shared pool, called default. | yarn.scheduler.fair.user-as-default-queue | true | resourcemanager_fair_scheduler_user_as_default_queue | true |
| ApplicationMaster Monitor Expiry | The expiry interval to wait until an ApplicationMaster is considered dead. | yarn.am.liveness-monitor.expiry-interval-ms | 10 minute(s) | yarn_am_liveness_monitor_expiry_interval_ms | false |
| NodeManager Monitor Expiry | The expiry interval to wait until a NodeManager is considered dead. | yarn.nm.liveness-monitor.expiry-interval-ms | 10 minute(s) | yarn_nm_liveness_monitor_expiry_interval_ms | false |
| Admin Client Thread Count | Number of threads used to handle the ResourceManager admin interface. | yarn.resourcemanager.admin.client.thread-count | 1 | yarn_resourcemanager_admin_client_thread_count | false |
| ApplicationMaster Maximum Attempts | The maximum number of application attempts. This is a global setting for all ApplicationMasters.. Each ApplicationMaster can specify its individual maximum through the API, but if the individual maximum is more than the global maximum, the ResourceManager will override it. | yarn.resourcemanager.am.max-attempts | 2 | yarn_resourcemanager_am_max_retries | false |
| ApplicationMaster Monitor Interval | The periodic interval that the ResourceManager will check whether ApplicationMasters is still alive. | yarn.resourcemanager.amliveliness-monitor.interval-ms | 1 second(s) | yarn_resourcemanager_amliveliness_monitor_interval_ms | false |
| Client Thread Count | The number of threads used to handle applications manager requests. | yarn.resourcemanager.client.thread-count | 50 | yarn_resourcemanager_client_thread_count | false |
| Container Monitor Interval | The periodic interval that the ResourceManager will check whether containers are still alive. | yarn.resourcemanager.container.liveness-monitor.interval-ms | 10 minute(s) | yarn_resourcemanager_container_liveness_monitor_interval_ms | false |
| Max Completed Applications | The maximum number of completed applications that the ResourceManager keeps. | yarn.resourcemanager.max-completed-applications | 10000 | yarn_resourcemanager_max_completed_applications | false |
| NodeManager Monitor Interval | The periodic interval that the ResourceManager will check whether NodeManagers are still alive. | yarn.resourcemanager.nm.liveness-monitor.interval-ms | 1 second(s) | yarn_resourcemanager_nm_liveness_monitor_interval_ms | false |
| Enable ResourceManager Recovery | When enabled, any applications that were running on the cluster when the ResourceManager died will be recovered when the ResourceManager next starts. Note: If RM-HA is enabled, then this configuration is always enabled. | yarn.resourcemanager.recovery.enabled | false | yarn_resourcemanager_recovery_enabled | false |
| Resource Tracker Thread Count | Number of threads to handle resource tracker calls. | yarn.resourcemanager.resource-tracker.client.thread-count | 50 | yarn_resourcemanager_resource_tracker_client_thread_count | false |
| Scheduler Class | The class to use as the resource scheduler. FairScheduler is only supported in CDH 4.2.1 and later. | yarn.resourcemanager.scheduler.class | org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler | yarn_resourcemanager_scheduler_class | false |
| Scheduler Thread Count | The number of threads used to handle requests through the scheduler interface. | yarn.resourcemanager.scheduler.client.thread-count | 50 | yarn_resourcemanager_scheduler_client_thread_count | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Maximum Process File Descriptors | If configured, overrides the process soft and hard rlimits (also called ulimits) for file descriptors to the configured value. | rlimit_fds | false |
Ports and Addresses
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| ResourceManager Web Application HTTPS Port (SSL) | The HTTPS port of the ResourceManager web application. | yarn.resourcemanager.webapp.https.address | 8090 | resourcemanager_webserver_https_port | false |
| ResourceManager Web Application HTTP Port | The HTTP port of the ResourceManager web application. | yarn.resourcemanager.webapp.address | 8088 | resourcemanager_webserver_port | false |
| ResourceManager Address | The address of the applications manager interface in the ResourceManager. | yarn.resourcemanager.address | 8032 | yarn_resourcemanager_address | false |
| Administration Address | The address of the admin interface in the ResourceManager. | yarn.resourcemanager.admin.address | 8033 | yarn_resourcemanager_admin_address | false |
| Resource Tracker Address | The address of the resource tracker interface in the ResourceManager. | yarn.resourcemanager.resource-tracker.address | 8031 | yarn_resourcemanager_resource_tracker_address | false |
| Scheduler Address | The address of the scheduler interface in the ResourceManager. | yarn.resourcemanager.scheduler.address | 8030 | yarn_resourcemanager_scheduler_address | false |
| Bind ResourceManager to Wildcard Address | If enabled, the ResourceManager binds to the wildcard address ("0.0.0.0") on all of its ports. | false | yarn_rm_bind_wildcard | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Java Heap Size of ResourceManager in Bytes | Maximum size in bytes for the Java Process heap memory. Passed to Java -Xmx. | 1 GiB | resource_manager_java_heapsize | false | |
| Fair Scheduler Node Locality Threshold | For applications that request containers on particular nodes, the number of scheduling opportunities since the last container assignment to wait before accepting a placement on another node. Expressed as a float between 0 and 1, which, as a fraction of the cluster size, is the number of scheduling opportunities to pass up. If not set, this means don't pass up any scheduling opportunities. Requires Fair Scheduler continuous scheduling to be disabled. If continuous scheduling is enabled, yarn.scheduler.fair.locality-delay-node-ms should be used instead. | yarn.scheduler.fair.locality.threshold.node | resourcemanager_fair_scheduler_locality_threshold_node | false | |
| Fair Scheduler Rack Locality Threshold | For applications that request containers on particular racks, the number of scheduling opportunities since the last container assignment to wait before accepting a placement on another rack. Expressed as a float between 0 and 1, which, as a fraction of the cluster size, is the number of scheduling opportunities to pass up. If not set, this means don't pass up any scheduling opportunities. Requires Fair Scheduler continuous scheduling to be disabled. If continuous scheduling is enabled, yarn.scheduler.fair.locality-delay-rack-ms should be used instead. | yarn.scheduler.fair.locality.threshold.rack | resourcemanager_fair_scheduler_locality_threshold_rack | false | |
| Cgroup CPU Shares | Number of CPU shares to assign to this role. The greater the number of shares, the larger the share of the host's CPUs that will be given to this role when the host experiences CPU contention. Must be between 2 and 262144. Defaults to 1024 for processes not managed by Cloudera Manager. | cpu.shares | 1024 | rm_cpu_shares | true |
| Cgroup I/O Weight | Weight for the read I/O requests issued by this role. The greater the weight, the higher the priority of the requests when the host experiences I/O contention. Must be between 100 and 1000. Defaults to 1000 for processes not managed by Cloudera Manager. | blkio.weight | 500 | rm_io_weight | true |
| Cgroup Memory Hard Limit | Hard memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.limit_in_bytes | -1 MiB | rm_memory_hard_limit | true |
| Cgroup Memory Soft Limit | Soft memory limit to assign to this role, enforced by the Linux kernel. When the limit is reached, the kernel will reclaim pages charged to the process if and only if the host is facing memory pressure. If reclaiming fails, the kernel may kill the process. Both anonymous as well as page cache pages contribute to the limit. Use a value of -1 B to specify no limit. By default processes not managed by Cloudera Manager will have no limit. | memory.soft_limit_in_bytes | -1 MiB | rm_memory_soft_limit | true |
| Enable Fair Scheduler Continuous Scheduling | Enable continuous scheduling in the Fair Scheduler. When enabled, scheduling decisions are decoupled from NodeManager heartbeats, leading to faster resource allocations. | yarn.scheduler.fair.continuous-scheduling-enabled | true | yarn_scheduler_fair_continuous_scheduling_enabled | false |
| Fair Scheduler Node Locality Delay | For applications that request containers on particular nodes, the minimum time in milliseconds the Fair Scheduler waits before accepting a placement on another node. Requires Fair Scheduler continuous scheduling to be enabled. If continuous scheduling is disabled, yarn.scheduler.fair.locality.threshold.node should be used instead. | yarn.scheduler.fair.locality-delay-node-ms | 2 second(s) | yarn_scheduler_fair_locality_delay_node_ms | false |
| Fair Scheduler Rack Locality Delay | For applications that request containers on particular racks, the minimum time in milliseconds the Fair Scheduler waits before accepting a placement on another rack. Requires Fair Scheduler continuous scheduling to be enabled. If continuous scheduling is disabled, yarn.scheduler.fair.locality.threshold.rack should be used instead. | yarn.scheduler.fair.locality-delay-rack-ms | 4 second(s) | yarn_scheduler_fair_locality_delay_rack_ms | false |
| Container Memory Increment | If using the Fair Scheduler, memory requests will be rounded up to the nearest multiple of this number. This parameter has no effect prior to CDH 5. | yarn.scheduler.increment-allocation-mb | 512 MiB | yarn_scheduler_increment_allocation_mb | true |
| Container Virtual CPU Cores Increment | If using the Fair Scheduler, virtual core requests will be rounded up to the nearest multiple of this number. This parameter has no effect prior to CDH 5. | yarn.scheduler.increment-allocation-vcores | 1 | yarn_scheduler_increment_allocation_vcores | true |
| Container Memory Maximum | The largest amount of physical memory, in MiB, that can be requested for a container. | yarn.scheduler.maximum-allocation-mb | 64 GiB | yarn_scheduler_maximum_allocation_mb | true |
| Container Virtual CPU Cores Maximum | The largest number of virtual CPU cores that can be requested for a container. This parameter has no effect prior to CDH 4.4. | yarn.scheduler.maximum-allocation-vcores | 32 | yarn_scheduler_maximum_allocation_vcores | true |
| Container Memory Minimum | The smallest amount of physical memory, in MiB, that can be requested for a container. If using the Capacity or FIFO scheduler (or any scheduler, prior to CDH 5), memory requests will be rounded up to the nearest multiple of this number. | yarn.scheduler.minimum-allocation-mb | 1 GiB | yarn_scheduler_minimum_allocation_mb | true |
| Container Virtual CPU Cores Minimum | The smallest number of virtual CPU cores that can be requested for a container. If using the Capacity or FIFO scheduler (or any scheduler, prior to CDH 5), virtual core requests will be rounded up to the nearest multiple of this number. This parameter has no effect prior to CDH 4.4. | yarn.scheduler.minimum-allocation-vcores | 1 | yarn_scheduler_minimum_allocation_vcores | true |
Stacks Collection
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Stacks Collection Data Retention | The amount of stacks data that will be retained. After the retention limit is reached, the oldest data will be deleted. | stacks_collection_data_retention | 100 MiB | stacks_collection_data_retention | false |
| Stacks Collection Directory | The directory in which stacks logs will be placed. If not set, stacks will be logged into a stacks subdirectory of the role's log directory. | stacks_collection_directory | stacks_collection_directory | false | |
| Stacks Collection Enabled | Whether or not periodic stacks collection is enabled. | stacks_collection_enabled | false | stacks_collection_enabled | true |
| Stacks Collection Frequency | The frequency with which stacks will be collected. | stacks_collection_frequency | 5.0 second(s) | stacks_collection_frequency | false |
| Stacks Collection Method | The method that will be used to collect stacks. The jstack option involves periodically running the jstack command against the role's daemon process. The servlet method is available for those roles that have an HTTP server endpoint exposing the current stacks traces of all threads. When the servlet method is selected that HTTP endpoint is periodically scraped. | stacks_collection_method | jstack | stacks_collection_method | false |
service_wide
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| System User's Home Directory | The home directory of the system user on the local filesystem. This setting must reflect the system's configured value - only changing it here will not change the actual home directory. | /var/lib/hadoop-yarn | hdfs_user_home_dir | true | |
| System Group | The group that this service's processes should run as. (Except the Job History Server, which has its own group) | hadoop | process_groupname | true | |
| System User | The user that this service's processes should run as. (Except the Job History Server, which has its own user) | yarn | process_username | true | |
| YARN Application Classpath | Entries to add to the classpaths of YARN applications. | yarn.application.classpath | $HADOOP_CLIENT_CONF_DIR, $HADOOP_CONF_DIR, $HADOOP_COMMON_HOME/*, $HADOOP_COMMON_HOME/lib/*, $HADOOP_HDFS_HOME/*, $HADOOP_HDFS_HOME/lib/*, $HADOOP_YARN_HOME/*, $HADOOP_YARN_HOME/lib/* | yarn_application_classpath | false |
| YARN Service Advanced Configuration Snippet (Safety Valve) for core-site.xml | For advanced use only, a string to be inserted into core-site.xml. Applies to configurations of all roles in this service except client configuration. | yarn_core_site_safety_valve | false | ||
| Fair Scheduler Configuration Rules | A list specifying the rules to run to determine which Fair Scheduler configuration to use. Typically edited using the Rules configuration UI. | [] | yarn_fs_schedule_rules | false | |
| Fair Scheduler Allocations | JSON representation of all the configurations that the Fair Scheduler can take on across all schedules. Typically edited using the Pools configuration UI. | defaultMinSharePreemptionTimeout:null, defaultQueueSchedulingPolicy:null, fairSharePreemptionTimeout:null, queueMaxAppsDefault:null, queuePlacementRules:null, queues:[aclAdministerApps:null, aclSubmitApps:null, minSharePreemptionTimeout:null, name:root, queues:[aclAdministerApps:null, aclSubmitApps:null, minSharePreemptionTimeout:null, name:default, queues:[], schedulablePropertiesList:[impalaMaxMemory:null, impalaMaxQueuedQueries:null, impalaMaxRunningQueries:null, maxResources:null, maxRunningApps:null, minResources:null, scheduleName:default, weight:null], schedulingPolicy:null], schedulablePropertiesList:[impalaMaxMemory:null, impalaMaxQueuedQueries:null, impalaMaxRunningQueries:null, maxResources:null, maxRunningApps:null, minResources:null, scheduleName:default, weight:null], schedulingPolicy:null], userMaxAppsDefault:null, users:[] | yarn_fs_scheduled_allocations | false | |
| YARN Service Advanced Configuration Snippet (Safety Valve) for hadoop-policy.xml | For advanced use only, a string to be inserted into hadoop-policy.xml. Applies to configurations of all roles in this service except client configuration. | yarn_hadoop_policy_config_safety_valve | false | ||
| YARN Service Advanced Configuration Snippet (Safety Valve) for yarn-site.xml | For advanced use only, a string to be inserted into yarn-site.xml. Applies to configurations of all roles in this service except client configuration. | yarn_service_config_safety_valve | false | ||
| YARN Service Environment Advanced Configuration Snippet (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be inserted into a role's environment. Applies to configurations of all roles in this service except client configuration. | yarn_service_env_safety_valve | false | ||
| YARN Service MapReduce Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into mapred-site.xml. Applies to configurations of all roles in this service except client configuration. | yarn_service_mapred_safety_valve | false | ||
| YARN (MR2 Included) Service Advanced Configuration Snippet (Safety Valve) for ssl-client.xml | For advanced use only, a string to be inserted into ssl-client.xml. Applies to configurations of all roles in this service except client configuration. | yarn_ssl_client_safety_valve | false | ||
| YARN (MR2 Included) Service Advanced Configuration Snippet (Safety Valve) for ssl-server.xml | For advanced use only, a string to be inserted into ssl-server.xml. Applies to configurations of all roles in this service except client configuration. | yarn_ssl_server_safety_valve | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Admin Users Applications List Visibility Settings | Controls which applications an admin user can see in the applications list view | ALL | admin_application_list_settings | true | |
| Enable Log Event Capture | When set, each role identifies important log events and forwards them to Cloudera Manager. | true | catch_events | false | |
| Enable Service Level Health Alerts | When set, Cloudera Manager will send alerts when the health of this service reaches the threshold specified by the EventServer setting eventserver_health_events_alert_threshold | true | enable_alerts | false | |
| Enable Configuration Change Alerts | When set, Cloudera Manager will send alerts when this entity's configuration changes. | false | enable_config_alerts | false | |
| Log Event Retry Frequency | The frequency in which the log4j event publication appender will retry sending undelivered log events to the Event server, in seconds | 30 | log_event_retry_frequency | false | |
| Service Triggers | The configured triggers for this service. This is a JSON formatted list of triggers. These triggers are evaluated as part as the
health system. Every trigger expression is parsed, and if the trigger condition is met, the list of actions provided in the trigger expression is executed. Each trigger has all of the following
fields:
|
[] | service_triggers | true | |
| Service Monitor Derived Configs Advanced Configuration Snippet (Safety Valve) | For advanced use only, a list of derived configuration properties that will be used by the Service Monitor instead of the default ones. | smon_derived_configs_safety_valve | false | ||
| Non-Admin Users Applications List Visibility Settings | Controls which applications non-admin users can see in the applications list view | ALL | user_application_list_settings | true | |
| Active ResourceManager Detection Window | The tolerance window used in YARN service tests that depend on detection of the active ResourceManager. | 3 minute(s) | yarn_active_resourcemanager_detecton_window | false | |
| YARN Application Aggregates | Controls the aggregate metrics generated for YARN applications. The structure is a JSON list of the attributes to aggregate and the entities to aggregate to. For example, if the attributeName is 'maps_completed' and the aggregationTargets is ['USER'] then the Service Monitor will create the metric 'yarn_application_maps_completed_rate' and, every ten minutes, will record the total maps completed for each user across all their YARN applications. By default it will also record the number of applications submitted ('apps_submitted_rate') for both users and pool. For a full list of the supported attributes see the YARN search page. Note that the valid aggregation targets are USER, YARN_POOL, and YARN (the service), and that these aggregate metrics can be viewed on both the reports and charts search pages. | [ attributeName: maps_total, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: reduces_total, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: cpu_milliseconds, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: mb_millis_maps, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: mb_millis_reduces, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: vcores_millis_maps, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: vcores_millis_reduces, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: file_bytes_read, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: file_bytes_written, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: hdfs_bytes_read, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: hdfs_bytes_written, aggregationTargets: [USER, YARN_POOL, YARN] , attributeName: cm_cpu_milliseconds, aggregationTargets: [USER] ] | yarn_application_aggregates | false | |
| JobHistory Server Role Health Test | When computing the overall YARN health, consider JobHistory Server's health | true | yarn_jobhistoryserver_health_enabled | false | |
| Healthy NodeManager Monitoring Thresholds | The health test thresholds of the overall NodeManager health. The check returns "Concerning" health if the percentage of "Healthy" NodeManagers falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" NodeManagers falls below the critical threshold. | Warning: 95.0 %, Critical: 90.0 % | yarn_nodemanagers_healthy_thresholds | false | |
| ResourceManager Activation Startup Tolerance | The amount of time after ResourceManager(s) start that the lack of an active ResourceManager will be tolerated. This is an advanced option that does not often need to be changed. | 3 minute(s) | yarn_resourcemanager_activation_startup_tolerance | false | |
| Active ResourceManager Role Health Check | When computing the overall YARN service health, whether to consider the active ResourceManager's health. | true | yarn_resourcemanagers_health_enabled | false | |
| Standby ResourceManager Health Check | When computing the overall YARN service health, whether to consider the health of the standby ResourceManager. | true | yarn_standby_resourcemanager_health_enabled | false |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| HDFS Service | Name of the HDFS service that this YARN service instance depends on | hdfs_service | true | ||
| Enable ResourceManager ACLs | Whether users and groups specified in Admin ACL should be checked for authorization to perform admin operations. | yarn.acl.enable | true | yarn_acl_enable | false |
| Admin ACL | ACL that determines which users and groups can submit and kill applications in any pool, and can issue commands on ResourceManager roles. | yarn.admin.acl | * | yarn_admin_acl | false |
| Enable Log Aggregation | Whether to enable log aggregation | yarn.log-aggregation-enable | true | yarn_log_aggregation_enable | false |
| Log Aggregation Retention Period | How long to keep aggregation logs before deleting them. | yarn.log-aggregation.retain-seconds | 7 day(s) | yarn_log_aggregation_retain_seconds | false |
| RM-HA Cluster ID | Cluster ID used when ResourceManager is Highly Available. | yarn.resourcemanager.cluster-id | yarnRM | yarn_rm_ha_cluster_id | false |
| ZooKeeper Service | Name of the ZooKeeper service that this YARN service instance depends on | zookeeper_service | false |
Proxy
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Llama Proxy User Groups | Comma-delimited list of groups that you want to allow the Llama (AM for Impala) user to impersonate. The default '*' allows all groups. To disable entirely, use a string that doesn't correspond to a group name, such as '_no_group_'. | hadoop.proxyuser.llama.groups | * | llama_proxy_user_groups_list | false |
| Llama Proxy User Hosts | Comma-delimited list of hosts where you want to allow the Llama (AM for Impala) user to impersonate other users. The default '*' allows all hosts. To disable entirely, use a string that doesn't correspond to a host name, such as '_no_host'. | hadoop.proxyuser.llama.hosts | * | llama_proxy_user_hosts_list | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| UNIX User for Nonsecure Mode with Linux Container Executor | UNIX user that containers run as when Linux-container-executor is used in nonsecure mode. | yarn.nodemanager.linux-container-executor.nonsecure-mode.local-user | nobody | yarn_nodemanager_linux_container_executor_nonsecure_mode_local_user | false |
| Allow Undeclared Pools | When set to true, pools specified in applications but not explicitly configured, are created at runtime with default settings. When set to false, applications specifying pools not explicitly configured run in a pool named default. This setting applies when an application explicitly specifies a pool and when the application runs in a pool named with the username associated with the application. | yarn.scheduler.fair.allow-undeclared-pools | true | yarn_scheduler_fair_allow_undeclared_pools | false |
| Use CGroups for Resource Management | Whether YARN creates a cgroup per container, thereby isolating the CPU usage of containers. When set, yarn.nodemanager.linux-container-executor.resources-handler.class is configured to org.apache.hadoop.yarn.server.nodemanager.util.CgroupsLCEResourcesHandler. The host (in Cloudera Manager) must have cgroups enabled. The number of shares allocated to all YARN containers is configured by adjusting the CPU shares value of the Node Manager in the Resource Management configuration group. | yarn.nodemanager.linux-container-executor.resources-handler.class | false | yarn_service_cgroups | false |
| Always Use Linux Container Executor | Whether YARN uses the Linux Container Executor both in secure (Kerberos) and insecure (not Kerberos) environments. Cgroups enforcement only works when the Linux Container Executor is used. | yarn.nodemanager.container-executor.class | false | yarn_service_lce_always | false |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Authentication for HTTP Web-Consoles | Enables authentication for hadoop HTTP web-consoles for all roles of this service. Note: This is effective only if security is enabled for the HDFS service. | false | hadoop_secure_web_ui | false | |
| SSL Client Truststore File Location | Path to the truststore file used when roles of this service act as SSL clients. Overrides the cluster-wide default truststore location set in HDFS. This truststore must be in JKS format. The truststore contains certificates of trusted servers, or of Certificate Authorities trusted to identify servers. The contents of the truststore can be modified without restarting any roles. By default, changes to its contents are picked up within ten seconds. If not set, the default Java truststore is used to verify certificates. | ssl.client.truststore.location | ssl_client_truststore_location | false | |
| SSL Client Truststore File Password | Password for the SSL client truststore. Overrides the cluster-wide default truststore password set in HDFS. | ssl.client.truststore.password | ssl_client_truststore_password | false | |
| Hadoop SSL Server Keystore Key Password | Password that protects the private key contained in the server keystore used for encrypted shuffle and encrypted web UIs. Applies to all configurations of daemon roles of this service. | ssl.server.keystore.keypassword | ssl_server_keystore_keypassword | false | |
| Hadoop SSL Server Keystore File Location | Path to the keystore file containing the server certificate and private key used for encrypted shuffle and encrypted web UIs. Applies to configurations of all daemon roles of this service. | ssl.server.keystore.location | ssl_server_keystore_location | false | |
| Hadoop SSL Server Keystore File Password | Password for the server keystore file used for encrypted shuffle and encrypted web UIs. Applies to configurations of all daemon roles of this service. | ssl.server.keystore.password | ssl_server_keystore_password | false |