Impala Properties in CDH 5.2.0
impalacatalogserverdefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Catalog Server Command Line Argument Advanced Configuration Snippet (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be added (verbatim) to Catalog Server command line flags. Key names should begin with a hyphen(-). For example: -log_filename=foo.log | catalogd_cmd_args_safety_valve | false | ||
| Catalog Server HBase Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hbase-site.xml for this role only. | catalogd_hbase_conf_safety_valve | false | ||
| Catalog Server HDFS Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hdfs-site.xml for this role only. | catalogd_hdfs_site_conf_safety_valve | false | ||
| Catalog Server Hive Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hive-site.xml for this role only. | catalogd_hive_conf_safety_valve | false | ||
| Catalog Server Hive Metastore Connection Timeout | Timeout for requests to the Hive Metastore Server from Catalog Server. Consider increasing this if you have tables with a lot of metadata and see timeout errors. | hive.metastore.client.socket.timeout | 1 hour(s) | hive_metastore_timeout | false |
| Load Catalog in Background | If true, loads catalog metadata in the background. If false, metadata is loaded lazily (on access). Only effective in CDH 5+ and Impala 1.2.4+. | load_catalog_in_background | true | load_catalog_in_background | false |
| 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 |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Catalog Server Log Directory | Directory where Catalog Server will place its log files. | log_dir | /var/log/catalogd | log_dir | false |
| Impala Catalog Server Logging Threshold | The minimum log level for Impala Catalog Server logs | INFO | log_threshold | false | |
| Catalog Server Verbose Log Level | Verbose logging level for the GLog logger. These messages are always logged at 'INFO' log level, so this setting has no effect if Logging Threshold is set to 'WARN' or above. | GLOG_v | 1 | log_verbose_level | false |
| Catalog Server Log Buffer Level | Buffer log messages logged at this level or lower (-1 means don't buffer; 0 means buffer INFO only; 1 means buffer WARNING only, ...) | logbuflevel | 0 | logbuflevel | false |
| Impala Catalog Server Max Log Size | The maximum size, in megabytes, per log file for Impala Catalog Server logs. Typically used by log4j. | 200 MiB | max_log_size | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Catalog Server Connectivity Health Test | Enables the health test that verifies the Catalog Server is connected to the StateStore | true | catalogserver_connectivity_health_enabled | false | |
| Catalog Server Connectivity Tolerance at Startup | The amount of time to wait for the Catalog Server to fully start up and connect to the StateStore before enforcing the connectivity check. | 3 minute(s) | catalogserver_connectivity_tolerance | 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 % | catalogserver_fd_thresholds | false | |
| Impala Catalog Server Host Health Test | When computing the overall Impala Catalog Server health, consider the host's health. | true | catalogserver_host_health_enabled | false | |
| Impala Catalog Server Process Health Test | Enables the health test that the Impala Catalog Server's process state is consistent with the role configuration | true | catalogserver_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) | catalogserver_startup_tolerance | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | catalogserver_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 | catalogserver_web_metric_collection_thresholds | false | |
| 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 | |
| Resident Set Size Thresholds | The health test thresholds on the resident size of the process. | Warning: Never, Critical: Never | process_resident_set_size_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 Catalog Server Web Server | Enable/Disable Catalog Server web server. This web server contains useful information about Catalog Server daemon. | enable_webserver | true | catalogd_enable_webserver | 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 |
|---|---|---|---|---|---|
| Catalog Server Service Port | Port where Catalog Server is exported. | catalog_service_port | 26000 | catalog_service_port | false |
| Catalog Server HTTP Server Port | Port where Catalog Server debug web server runs. | webserver_port | 25020 | catalogserver_webserver_port | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| 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 |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| SSL Certificate File Location | The location of the debug web server's SSL certificate file, in .pem format. If empty, webserver SSL support is not enabled. | webserver_certificate_file | webserver_certificate_file | false | |
| Catalog Server Web Server User Password | Password for Catalog Server web server authentication. | webserver_htpassword_password | webserver_htpassword_password | false | |
| Catalog Server Web Server Username | Username for Catalog Server web server authentication. | webserver_htpassword_user | webserver_htpassword_user | false |
impaladaemondefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Impala Daemon Hive Metastore Connection Timeout | Timeout for requests to the Hive Metastore Server from Impala. Consider increasing this if you have tables with a lot of metadata and see timeout errors. | hive.metastore.client.socket.timeout | 1 hour(s) | hive_metastore_timeout | false |
| Impala Daemon HDFS Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hdfs-site.xml for this role only. | impala_hdfs_site_conf_safety_valve | false | ||
| Impala Daemon Hive Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hive-site.xml for this role only. | impala_hive_conf_safety_valve | false | ||
| Impala Daemon Llama Site Advanced Configuration | An XML snippet to append to llama-site.xml for Impala Daemons. This configuration only has effect on Impala versions 1.3 or greater. | impala_llama_site_conf_safety_valve | false | ||
| Impala Daemon Command Line Argument Advanced Configuration Snippet (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be added (verbatim) to Impala Daemon command-line flags. Key names should begin with a hyphen(-). For example: -log_filename=foo.log | impalad_cmd_args_safety_valve | false | ||
| Impala Daemon Fair Scheduler Advanced Configuration | An XML string to use verbatim for the contents of fair-scheduler.xml for Impala Daemons. This configuration only has effect on Impala versions 1.3 or greater. | impalad_fair_scheduler_safety_valve | false | ||
| Impala Daemon HBase Advanced Configuration Snippet (Safety Valve) | For advanced use only, a string to be inserted into hbase-site.xml for this role only. | impalad_hbase_conf_safety_valve | false | ||
| Result Cache Maximum Size | Maximum number of query results a client may request to be cached on a per-query basis to support restarting fetches. This option guards against unreasonably large result caches requested by clients. Requests exceeding this maximum will be rejected. | max_result_cache_size | 100000 | impalad_result_cache_max_size | false |
| Llama Maximum Request Attempts | Maximum number of times a request to reserve, expand, or release resources is attempted until the request is cancelled. | llama_max_request_attempts | 5 | llama_max_request_attempts | false |
| Llama Registration Timeout Seconds | Maximum number of seconds that Impala attempts to register or re-register with Llama. If registration is unsuccessful, Impala cancels the action with an error, which could result in an impalad startup failure or a cancelled query. A setting of -1 seconds means try indefinitely. | llama_registration_timeout_secs | 30 second(s) | llama_registration_timeout_secs | false |
| Llama Registration Wait Seconds | Number of seconds to wait between attempts during Llama registration. | llama_registration_wait_secs | 3 second(s) | llama_registration_wait_secs | false |
| Impala Daemon 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 | ||
| 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 |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Impala Daemon Audit Log Directory | The directory in which Impala Daemon audit event log files are written. If "Impala Audit Event Generation" property is enabled, Impala will generate its audit logs in this directory. | audit_event_log_dir | /var/log/impalad/audit | audit_event_log_dir | true |
| Enable Impala Audit Event Generation | Enables audit event generation by Impala daemons. The audit log file will be placed in the directory specified by 'Impala Daemon Audit Log Directory' parameter. | enable_audit_event_log | false | enable_audit_event_log | false |
| Impala Daemon Log Directory | Directory where Impala Daemon will place its log files. | log_dir | /var/log/impalad | log_dir | false |
| Impala Daemon Logging Threshold | The minimum log level for Impala Daemon logs | INFO | log_threshold | false | |
| Impala Daemon Verbose Log Level | Verbose logging level for the GLog logger. These messages are always logged at 'INFO' log level, so this setting has no effect if Logging Threshold is set to 'WARN' or above. | GLOG_v | 1 | log_verbose_level | false |
| Impala Daemon Log Buffer Level | Buffer log messages logged at this level or lower (-1 means don't buffer; 0 means buffer INFO only; 1 means buffer WARNING only, ...) | logbuflevel | 0 | logbuflevel | false |
| Impala Daemon Maximum Audit Log File Size | The maximum size (in queries) of the Impala Daemon audit event log file before a new one is created. | max_audit_event_log_file_size | 5000 line(s) | max_audit_event_log_file_size | false |
| Impala Daemon Max Log Size | The maximum size, in megabytes, per log file for Impala Daemon logs. Typically used by log4j. | 200 MiB | max_log_size | 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 | |
| Query Monitoring Timeout | The timeout used by the Cloudera Manager Agent's query monitor when communicating with the Impala Daemon web server, specified in seconds. | 5.0 second(s) | executing_queries_timeout_seconds | false | |
| Impala Daemon Connectivity Health Test | Enables the health test that verifies the Impala Daemon is connected to the StateStore | true | impalad_connectivity_health_enabled | false | |
| Impala Daemon Connectivity Tolerance at Startup | The amount of time to wait for the Impala Daemon to fully start up and connect to the StateStore before enforcing the connectivity check. | 3 minute(s) | impalad_connectivity_tolerance | 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 % | impalad_fd_thresholds | false | |
| Impala Daemon Host Health Test | When computing the overall Impala Daemon health, consider the host's health. | true | impalad_host_health_enabled | false | |
| Impala Daemon Ready Status Health Check | Enables the health check that determines if the Impala Daemon is ready to process queries. | true | impalad_ready_status_check_enabled | false | |
| Impala Daemon Ready Status Startup Tolerance | The amount of time at Impala Daemon startup allowed for the Impala Daemon to start accepting new queries for processing. | 3 minute(s) | impalad_ready_status_check_startup_tolerance | false | |
| Impala Daemon Process Health Test | Enables the health test that the Impala Daemon's process state is consistent with the role configuration | true | impalad_scm_health_enabled | false | |
| Impala Scratch Directories Free Space Monitoring Absolute Thresholds | The health test thresholds for monitoring of free space on the filesystems that contain Impala's scratch directories. | Warning: 10 GiB, Critical: 5 GiB | impalad_scratch_directories_free_space_absolute_thresholds | false | |
| Impala Scratch Directories Free Space Monitoring Percentage Thresholds | Configures the health check thresholds for monitoring free space on the filesystems that contain Impala's scratch directories. Specified as a percentage of the capacity on the filesystem. This setting is not used if a Scratch Directories Free Space Monitoring Absolute Thresholds setting is configured. | Warning: Never, Critical: Never | impalad_scratch_directories_free_space_percentage_thresholds | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | impalad_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 | impalad_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 | |
| Resident Set Size Thresholds | The health test thresholds on the resident size of the process. | Warning: Never, Critical: Never | process_resident_set_size_thresholds | false | |
| Query Monitoring Period | The polling period of the Impala query monitor in the Cloudera Manager Agent, specified in seconds. If set to zero, query monitoring is disabled. | 1.0 second(s) | query_monitoring_period_seconds | 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 |
|---|---|---|---|---|---|
| Impala Daemon Query Options Advanced Configuration Snippet (Safety Valve) | A list of key-value pairs of additional query options to pass to the Impala Daemon command line, separated by ','. | default_query_options | default_query_options | false | |
| Impala Daemons Load Balancer | Address of the load balancer used for Impala Daemons. Should be specified in host:port format. | impalad_load_balancer | false | ||
| Local UDF Library Dir | User-defined function (UDF) libraries are copied from HDFS into this local directory. | local_library_dir | /var/lib/impala/udfs | local_library_dir | false |
| Impala Daemon Scratch Directories | Directories where Impala Daemon will write data such as spilling information to disk to free up memory. This can potentially be large amounts of data. | scratch_dirs | scratch_dirs | 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 |
|---|---|---|---|---|---|
| Impala Daemon Backend Port | Port on which ImpalaBackendService is exported. | be_port | 22000 | be_port | false |
| Impala Daemon Beeswax Port | Port on which Beeswax client requests are served by Impala Daemons. | beeswax_port | 21000 | beeswax_port | false |
| Impala Daemon HiveServer2 Port | Port on which HiveServer2 client requests are served by Impala Daemons. | hs2_port | 21050 | hs2_port | false |
| Enable Impala Daemon Web Server | Enable or disable the Impala Daemon web server. This web server contains useful information about Impala Daemon. | enable_webserver | true | impalad_enable_webserver | false |
| Impala Daemon HTTP Server Port | Port where Impala debug web server runs. | webserver_port | 25000 | impalad_webserver_port | false |
| Llama Callback Port | Port where Llama notification callback should be started | llama_callback_port | 28000 | llama_callback_port | false |
| StateStoreSubscriber Service Port | Port where StateStoreSubscriberService is running. | state_store_subscriber_port | 23000 | state_store_subscriber_port | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Impala Daemon Memory Limit | Memory limit in bytes for Impala Daemon, enforced by the daemon itself. If reached, queries running on the Impala Daemon may be killed. Leave it blank to let Impala pick its own limit. Use a value of -1 B to specify no limit. | mem_limit | impalad_memory_limit | 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 |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Disk Spill Encryption | Encrypt and verify the integrity of all data spilled to disk as part of a query. This feature is only supported for Impala 2.0+ and CDH 5.2+ (which includes Impala 2.0). | disk_spill_encryption | false | disk_spill_encryption | false |
| LDAP Server Certificate | The location on disk of the certificate, in .pem format, used to confirm the authenticity of the LDAP server certificate. If not set, Impala by default trusts all certificates supplied by the LDAP server. | ldap_ca_certificate | impalad_ldap_ca_certificate | false | |
| SSL Certificate File Location | The location of the debug webserver's SSL certificate file, in .pem format. If empty, webserver SSL support is not enabled. | webserver_certificate_file | webserver_certificate_file | false | |
| Impala Daemon Web Server User Password | Password for Impala Daemon webserver authentication. | webserver_htpassword_password | webserver_htpassword_password | false | |
| Impala Daemon Web Server Username | Username for Impala Daemon webserver authentication. | webserver_htpassword_user | webserver_htpassword_user | false |
impalallamaapplicationmasterdefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Resource Caching | Whether Llama should cache allocated resources on release. | llama.am.cache.enabled | true | llama_am_cache_enabled | false |
| Resource Caching Idle Timeout | Timeout policy for resources being cached. | llama.am.cache.eviction.timeout.policy.idle.timeout.ms | 30 second(s) | llama_am_cache_eviction_timeout_policy_idle_timeout_ms | false |
| Anti-Deadlock Backoff Percentage | Percentage of resources that will be backed off by the Impala ApplicationMaster anti-deadlock logic. Random reservations will be backed off until the percentage of backed off resources reaches this percentage. | llama.am.gang.anti.deadlock.backoff.percent | 30 % | llama_am_gang_anti_deadlock_backoff_percent | false |
| Anti-Deadlock Maximum Delay | Maximum amount of time the backed off reservations will be in 'backed off' state. The actual amount time is a random value between the minimum and the maximum. | llama.am.gang.anti.deadlock.max_delay_ms | 30 second(s) | llama_am_gang_anti_deadlock_max_delay_ms | false |
| Anti-Deadlock Minimum Delay | Minimum amount of time the backed off reservations will be in 'backed off' state. The actual amount time is a random value between the minimum and the maximum. | llama.am.gang.anti.deadlock.min_delay_ms | 10 second(s) | llama_am_gang_anti_deadlock_min_delay_ms | false |
| Anti-Deadlock No Allocation Limit Interval | Interval of time without any new allocation that will trigger the Impala ApplicationMaster anti-deadlock logic. | llama.am.gang.anti.deadlock.no.allocation.limit.ms | 30 second(s) | llama_am_gang_anti_deadlock_no_allocation_limit_ms | false |
| Enable Resource Cache Normalization | Whether to break resource requests into smaller requests of standard size before the resource cache. The sizes are taken from Yarn settings Container Memory Increment and Container Virtual CPU Cores Increment. | llama.am.resource.normalizing.enabled | true | llama_am_resource_normalizing_enabled | false |
| Maximum Client Notification Retries | Maximum number of retries for a client notification. After the maximum number of client notification retries has been reached without success the client is considered lost and all its reservations are released. A successful client notification resets the retries count. | llama.am.server.thrift.client.notifier.max.retries | 5 | llama_am_server_thrift_client_notifier_max_retries | false |
| Client Notification Retry Interval | Client notification retry interval, in milliseconds. | llama.am.server.thrift.client.notifier.retry.interval.ms | 5 second(s) | llama_am_server_thrift_client_notifier_retry_interval_ms | false |
| Impala Llama ApplicationMaster Advanced Configuration Snippet (Safety Valve) for llama-site.xml | For advanced use only, a string to be inserted into llama-site.xml for this role only. | llama_config_valve | false | ||
| Fair Scheduler XML Advanced Configuration Snippet (Safety Valve) | Enter an XML string that will be inserted verbatim into the Fair Scheduler allocations file. Overrides the configuration set using the Pools configuration UI. This configuration only has effect on Impala versions 1.3 or greater. | llama_fair_scheduler_safety_valve | false | ||
| Java Configuration Options for Llama 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. | llama_java_opts | false | ||
| Impala Llama ApplicationMaster 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. | true | process_auto_restart | true | |
| Llama System Group | The group that the Llama processes should run as. | llama | process_groupname | true | |
| Llama System User | The user that the Llama process should run as. | llama | process_username | true |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Llama Log Directory | Directory where Llama will place its log files. | llama_log_dir | /var/log/impala-llama | llama_log_dir | false |
| Impala Llama ApplicationMaster Logging Threshold | The minimum log level for Impala Llama ApplicationMaster logs | INFO | log_threshold | false | |
| Impala Llama ApplicationMaster Maximum Log File Backups | The maximum number of rolled log files to keep for Impala Llama ApplicationMaster logs. Typically used by log4j. | 10 | max_log_backup_index | false | |
| Impala Llama ApplicationMaster Max Log Size | The maximum size, in megabytes, per log file for Impala Llama ApplicationMaster logs. Typically used by log4j. | 200 MiB | max_log_size | 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 % | llama_fd_thresholds | false | |
| Impala Llama ApplicationMaster Host Health Test | When computing the overall Impala Llama ApplicationMaster health, consider the host's health. | true | llama_host_health_enabled | false | |
| Impala Llama ApplicationMaster Process Health Test | Enables the health test that the Impala Llama ApplicationMaster's process state is consistent with the role configuration | true | llama_scm_health_enabled | 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 | |
| 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 |
|---|---|---|---|---|---|
| Core Queues | Queues Llama ApplicationMaster should connect to at start up. | llama.am.core.queues | llama_am_core_queues | false | |
| Administrative Interface ACLs | ACL for Impala ApplicationMaster admins. The ACL is a comma-separated list of user and group names. The user and group list is separated by a blank. For e.g. "alice,bob users,wheel". A special value of "*" means all users are allowed. These take effect only if security is enabled. | llama.am.server.thrift.admin.acl | * | llama_am_server_thrift_admin_acl | false |
| Client ACLs | ACL for Impala ApplicationMaster clients. The ACL is a comma-separated list of user and group names. The user and group list is separated by a blank. For e.g. "alice,bob users,wheel". A special value of "*" means all users are allowed. These take effect only if security is enabled. | llama.am.server.thrift.client.acl | * | llama_am_server_thrift_client_acl | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Queue Expiration Age | Time in milliseconds after which Llama will discard its AM for a queue that has been empty of reservations. Does not apply to queues specified with the Core Queues property. | llama.am.queue.expire.ms | 5 minute(s) | llama_am_queue_expire_ms | false |
| AM Heartbeat Interval | Llama ApplicationMaster heartbeat interval, in milliseconds. On each heartbeat the ApplicationMaster submits new reservations to YARN ResourceManager and gets updates from it. | llama.am.server.thrift.client.notifier.heartbeat.ms | 5 second(s) | llama_am_server_thrift_client_notifier_heartbeat_ms | false |
| Thrift Server Maximum Threads | Maximum number of threads used by the Llama ApplicationMaster auxiliary service uses for serving client requests. | llama.am.server.thrift.server.max.threads | 50 | llama_am_server_thrift_server_max_threads | false |
| Thrift Server Minimum Threads | Minimum number of threads used by the Llama ApplicationMaster auxiliary service uses for serving client requests. | llama.am.server.thrift.server.min.threads | 10 | llama_am_server_thrift_server_min_threads | false |
| Thrift Transport Timeout | Socket time, in milliseconds, used Llama ApplicationMaster auxiliary service for all its server and client Thrift connections. | llama.am.server.thrift.transport.timeout.ms | 1 minute(s) | llama_am_server_thrift_transport_timeout_ms | false |
| 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 |
|---|---|---|---|---|---|
| Llama Thrift Admin Port | Port on which the Llama ApplicationMaster listens to administrative requests on its administrative Thrift interface. | llama.am.server.thrift.admin.address | 15002 | llama_am_server_thrift_admin_address | false |
| Bind Impala Llama ApplicationMaster to Wildcard Address | If enabled, the Impala Llama ApplicationMaster binds to the wildcard address ("0.0.0.0") on all of its ports. | false | llama_bind_wildcard | false | |
| Llama HTTP Port | Port on which the Llama ApplicationMaster listens to HTTP requests. | llama.am.server.thrift.http.address | 15001 | llama_http_port | false |
| Llama Thrift Port | Port on which the Llama ApplicationMaster serves its Thrift interface. | llama.am.server.thrift.address | 15000 | llama_port | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Java Heap Size of Impala Llama ApplicationMaster in Bytes | Maximum size in bytes for the Java Process heap memory. Passed to Java -Xmx. | 256 MiB | llama_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 |
impalastatestoredefaultgroup
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| 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 | |
| Statestore Command Line Argument Advanced Configuration Snippet (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be added (verbatim) to StateStore command line flags. | statestore_cmd_args_safety_valve | false |
Logs
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| StateStore Log Directory | Directory where StateStore will place its log files. | log_dir | /var/log/statestore | log_dir | false |
| Impala StateStore Logging Threshold | The minimum log level for Impala StateStore logs | INFO | log_threshold | false | |
| StateStore Verbose Log Level | Verbose logging level for the GLog logger. These messages are always logged at 'INFO' log level, so this setting has no effect if Logging Threshold is set to 'WARN' or above. | GLOG_v | 1 | log_verbose_level | false |
| StateStore Log Buffer Level | Buffer log messages logged at this level or lower (-1 means don't buffer; 0 means buffer INFO only; 1 means buffer WARNING only, ...) | logbuflevel | 0 | logbuflevel | false |
| Impala StateStore Max Log Size | The maximum size, in megabytes, per log file for Impala StateStore logs. Typically used by log4j. | 200 MiB | max_log_size | 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 | |
| Resident Set Size Thresholds | The health test thresholds on the resident size of the process. | Warning: Never, Critical: Never | process_resident_set_size_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 | |
| 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 % | statestore_fd_thresholds | false | |
| Impala StateStore Host Health Test | When computing the overall Impala StateStore health, consider the host's health. | true | statestore_host_health_enabled | false | |
| Impala StateStore Process Health Test | Enables the health test that the Impala StateStore's process state is consistent with the role configuration | true | statestore_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) | statestore_startup_tolerance | false | |
| Web Metric Collection | Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. | true | statestore_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 | statestore_web_metric_collection_thresholds | false | |
| 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 StateStore Web Server | Enable/Disable StateStore web server. This web server contains useful information about StateStore daemon. | enable_webserver | true | statestore_enable_webserver | 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 | ||
| StateStore Worker Threads | Number of worker threads for the thread manager underlying the State Store Thrift server. | state_store_num_server_worker_threads | 4 | state_store_num_server_worker_threads | false |
| Maximum StateStore Pending Tasks | Maximum number of tasks allowed to be pending at the thread manager underlying the State Store Thrift server (0 allows infinitely many pending tasks) | state_store_pending_task_count_max | 0 | state_store_pending_task_count_max | false |
Ports and Addresses
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| StateStore Service Port | Port where StateStoreService is exported. | state_store_port | 24000 | state_store_port | false |
| StateStore HTTP Server Port | Port where StateStore debug web server runs. | webserver_port | 25010 | statestore_webserver_port | false |
Resource Management
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| 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 |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| SSL Certificate File Location | The location of the debug webserver's SSL certificate file, in .pem format. If empty, webserver SSL support is not enabled. | webserver_certificate_file | webserver_certificate_file | false | |
| Statestore Web Server User Password | Password for Statestore webserver authentication. | webserver_htpassword_password | webserver_htpassword_password | false | |
| Statestore Web Server Username | Username for Statestore webserver authentication. | webserver_htpassword_user | webserver_htpassword_user | false |
service_wide
Admission Control
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Dynamic Resource Pools | Use Dynamic Resource Pools to configure Impala admission control or RM for this Impala service. These features are only supported in Impala 1.3 or later deployments. | false | admission_control_enabled | false | |
| Admission Control Queue Timeout | Maximum amount of time (in milliseconds) that a request waits to be admitted before timing out. Must be a positive integer. | queue_wait_timeout_ms | 1 minute(s) | admission_control_queue_timeout | false |
| Single Pool Max Queued Queries | Configures the maximum number of queued queries for admission control when using a single pool. -1 or 0 disables queuing, i.e. incoming requests are rejected if they can not be executed immediately. Ignored when Dynamic Resource Pools for Admission Control is enabled. | default_pool_max_queued | 200 | admission_control_single_pool_max_queued | false |
| Single Pool Max Running Queries | Configures the maximum number of concurrently running queries for admission control when using a single pool. -1 indicates no limit and 0 indicates all incoming requests will be rejected. Ignored when Dynamic Resource Pools for Admission Control is enabled. | default_pool_max_requests | 200 | admission_control_single_pool_max_requests | false |
| Single Pool Mem Limit | Configures the max memory of running queries for admission control when using a single pool. -1 or 0 indicates no limit. Ignored when Dynamic Resource Pools for Admission Control is enabled. | default_pool_mem_limit | -1 B | admission_control_single_pool_mem_limit | false |
| Enable Impala Admission Control | Use Impala Admission Control to throttle Impala requests. Unless 'Enable Dynamic Resource Pools' is enabled, Impala uses a single, default pool that is configured using the Single Pool configurations below. These features are only supported in Impala 1.3 or later deployments. | false | all_admission_control_enabled | false |
Advanced
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Core Dump | Used to generate a core dump to get more information about an Impala crash. Unless otherwise configured system wide using /proc/sys/kernel/core_pattern, the dump is generated in the 'current directory' of the Impala process (usually a subdirectory of the /var/run/cloudera-scm-agent/process directory). The core file can be very large. | false | enable_core_dump | false | |
| Maximum HBase Client Retries | Maximum number of HBase client retries for Impala. Used as a maximum for all operations such as fetching of the root region from the root RegionServer, getting a cell's value, and starting a row update. Overrides configuration in the HBase service. | hbase.client.retries.number | 3 | hbase_client_retries_number | false |
| HBase RPC Timeout | Timeout in milliseconds for all HBase RPCs made by Impala. Overrides configuration in HBase service. | hbase.rpc.timeout | 3 second(s) | hbase_rpc_timeout | false |
| Impala Command Line Argument Advanced Configuration Snippet (Safety Valve) | For advanced use only, key-value pairs (one on each line) to be added (verbatim) to Impala Daemon command-line flags. Applies to all roles in this service. Key names should begin with a hyphen(-). For example: -log_filename=foo.log | impala_cmd_args_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. This configuration only has effect on Impala versions 1.3 or greater. | [] | impala_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. This configuration only has effect on Impala versions 1.3 or greater. | 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:[] | impala_scheduled_allocations | false | |
| Impala 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. | impala_service_env_safety_valve | false | ||
| Impala Service Advanced Configuration Snippet (Safety Valve) for sentry-site.xml | For advanced use only, a string to be inserted into sentry-site.xml. Applies to configurations of all roles in this service except client configuration. | impalad_sentry_safety_valve | false | ||
| Impala Client Advanced Configuration Snippet (Safety Valve) for navigator.client.properties | For advanced use only, a string to be inserted into the client configuration for navigator.client.properties. | navigator_client_config_safety_valve | false | ||
| Impala System Group (except Llama) | The group that this Impala's processes should run as (except Llama, which has its own group). | impala | process_groupname | true | |
| Impala System User (except Llama) | The user that this Impala's processes should run as (except Llama, which has its own user). | impala | process_username | true | |
| Use Debug Build | Use debug build of Impala binaries when starting roles. Useful when performing diagnostic activities to get more information in the stacktrace or core dump. | false | use_debug_build | false |
Cloudera Navigator
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable Audit Collection | Enable collection of audit events from the service's roles. | true | navigator_audit_enabled | false | |
| Event Filter | Event filters are defined in a JSON object like the following: { "defaultAction" : ("accept", "discard"),
"rules" : [ { "action" : ("accept", "discard"), "fields" : [ { "name" : "fieldName", "match" : "regex" } ] } ] } A filter has a default action and a list of rules, in order of precedence. Each
rule defines an action, and a list of fields to match against the audit event. A rule is "accepted" if all the listed field entries match the audit event. At that point, the action declared by the
rule is taken. If no rules match the event, the default action is taken. Actions default to "accept" if not defined in the JSON object. The following is the list of fields that can be filtered for
Impala events:
|
navigator.event.filter | navigator_audit_event_filter | false | |
| Queue Policy | Action to take when the audit event queue is full. Drop the event or shutdown the affected process. | navigator.batch.queue_policy | DROP | navigator_audit_queue_policy | false |
| Event Tracker | Configures the rules for event tracking and coalescing. This feature is used to define equivalency between different audit events.
When events match, according to a set of configurable parameters, only one entry in the audit list is generated for all the matching events. Tracking works by keeping a reference to events when they
first appear, and comparing other incoming events against the "tracked" events according to the rules defined here. Event trackers are defined in a JSON object like the following: { "timeToLive" : [integer], "fields" : [ { "type" : [string], "name" : [string] } ] } Where:
|
navigator_event_tracker | navigator_event_tracker | false |
Monitoring
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Admin Users Query List Visibility Settings | Controls which queries admin users can see in the queries list view | ALL | admin_query_list_settings | true | |
| 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 | |
| Assignment Locality Minimum Assignments | The minimum number of assignments that must occur during the test time period before the threshold values will be checked. Until this number of assignments have been observed in the test time period the health test will be disabled. | 10 | impala_assignment_locality_minimum | false | |
| Assignment Locality Ratio Thresholds | The health test thresholds for assignment locality. Specified as a percentage of total assignments. | Warning: 80.0 %, Critical: 5.0 % | impala_assignment_locality_thresholds | false | |
| Assignment Locality Monitoring Period | The time period over which to compute the assignment locality ratio. Specified in minutes. | 15 minute(s) | impala_assignment_locality_window | false | |
| Impala Catalog Server Role Health Test | When computing the overall IMPALA health, consider Impala Catalog Server's health | true | impala_catalogserver_health_enabled | false | |
| Healthy Impala Daemon Monitoring Thresholds | The health test thresholds of the overall Impala Daemon health. The check returns "Concerning" health if the percentage of "Healthy" Impala Daemons falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Impala Daemons falls below the critical threshold. | Warning: 95.0 %, Critical: 90.0 % | impala_impalads_healthy_thresholds | false | |
| Healthy Impala Llama ApplicationMaster Monitoring Thresholds | The health test thresholds of the overall Impala Llama ApplicationMaster health. The check returns "Concerning" health if the percentage of "Healthy" Impala Llama ApplicationMasters falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Impala Llama ApplicationMasters falls below the critical threshold. | Warning: 99.0 %, Critical: 51.0 % | impala_llamas_healthy_thresholds | false | |
| Impala Query Aggregates | Controls the aggregate metrics generated for Impala queries. The structure is a JSON list of the attributes to aggregate and the entities to aggregate to. For example, if the attributeName is 'hdfs_bytes_read' and the aggregationTargets is ['USER'] then the Service Monitor will create the metric 'impala_query_hdfs_bytes_read_rate' and, every ten minutes, will record the total hdfs bytes read for each user across all their Impala queries. By default it will also record the number of queries issues ('num_impala_queries_rate') for both users and pool. For a full list of the supported attributes see the Impala search page. Note that the valid aggregation targets are USER, YARN_POOL, and IMPALA (the service), and that these aggregate metrics can be viewed on both the reports and charts search pages. | [ attributeName: hdfs_bytes_read, aggregationTargets: [USER, YARN_POOL, IMPALA] , attributeName: hdfs_bytes_written, aggregationTargets: [USER, YARN_POOL, IMPALA] , attributeName: thread_cpu_time, aggregationTargets: [USER, YARN_POOL, IMPALA] , attributeName: bytes_streamed, aggregationTargets: [USER, YARN_POOL, IMPALA] , attributeName: cm_cpu_milliseconds, aggregationTargets: [USER] ] | impala_query_aggregates | false | |
| Impala StateStore Role Health Test | When computing the overall IMPALA health, consider Impala StateStore's health | true | impala_statestore_health_enabled | 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 Query List Visibility Settings | Controls which queries a non-admin user can see in the queries list view | ALL | user_query_list_settings | true |
Other
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| HBase Service | Name of the HBase service that this Impala service instance depends on | hbase_service | false | ||
| HDFS Service | Name of the HDFS service that this Impala service instance depends on | hdfs_service | true | ||
| Hive Service | Name of the Hive service that this Impala service instance depends on | hive_service | true | ||
| Sentry Service | Name of the Sentry service that this Impala service instance depends on. If selected, Impala uses this Sentry service to look up authorization privileges. Before enabling Sentry, read the requirements and configuration steps in Setting Up The Sentry Service . | sentry_service | false | ||
| YARN Service for Resource Management | Name of YARN service to use for resource management integration between Impala and YARN. This service dependency and the existence of a Llama role is required for using said integration. | yarn_service | false | ||
| Zookeeper Service for Llama HA | Name of the Zookeeper service to use for leader election and fencing when Llama is configured for High Availability. This service dependency is required when more than one Llama role is present. | zookeeper_service | false |
Performance
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable HDFS Short Circuit Read | Enable HDFS short circuit read. This allows a client co-located with the DataNode to read HDFS file blocks directly. This gives a performance boost to distributed clients that are aware of locality. | dfs.client.read.shortcircuit | true | dfs_client_read_shortcircuit | false |
| StateStoreSubscriber Timeout | Time in seconds before Impala Daemon or Catalog Server times out with the StateStore. | statestore_subscriber_timeout_seconds | 30 second(s) | statestore_subscriber_timeout | false |
Policy File-Based Sentry
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Proxy User Configuration | Specifies the set of authorized proxy users (users who can impersonate other users during authorization) and whom they are allowed to impersonate. Input is a semicolon-separated list of key=value pairs of authorized proxy users to the user(s) they can impersonate. These users are specified as a comma separated list of short usernames, or '*' to indicate all users. For example: joe=alice,bob;hue=*;admin=*. Only valid when Sentry is enabled. | authorized_proxy_user_config | hue=* | impala_authorized_proxy_user_config | false |
| Enable Sentry Authorization using Policy Files | Use Sentry to enable role-based, fine-grained authorization. This configuration enables Sentry using policy files. To enable Sentry using Sentry service instead, add Sentry service as a dependency to Impala service. Sentry service provides concurrent and secure access to authorization policy metadata and is the recommended option for enabling Sentry. Sentry is supported only on Impala 1.1 or later deployments. | impala.sentry.enabled | false | sentry_enabled | false |
Security
| Display Name | Description | Related Name | Default Value | API Name | Required |
|---|---|---|---|---|---|
| Enable SSL for Impala Client Services | Enable support for encrypted client-server communication using Secure Socket Layer (SSL) for Impala client services. This is only applicable to non-Kerberos environments. | client_services_ssl_enabled | false | client_services_ssl_enabled | false |
| Enable LDAP Authentication | If true, LDAP-based authentication for users is enabled. | enable_ldap_auth | false | enable_ldap_auth | false |
| Enable LDAP TLS | If true, attempts to establish a TLS (Transport Layer Security) connection with the ldap server. Only supported in Impala 1.4 or CDH 5.1 or higher. Not required when using an LDAP URI with prefix: ldaps://. | ldap_tls | false | enable_ldap_tls | false |
| LDAP URI | The URI of the LDAP server to use if LDAP is enabled. Typically, the URI should be prefixed with ldap:// or ldaps://. The URI can optionally specify the port, for example: ldap://ldap_server.example.com:389. ldaps is only supported in Impala 1.4 or CDH 5.1 or higher, and usually requires that you specify a port. | ldap_uri | ldap://ldap_server.example.com | impala_ldap_uri | false |
| Kerberos Re-init Interval | Number of minutes between reestablishing our ticket with the Kerberos server. | kerberos_reinit_interval | 1 hour(s) | kerberos_reinit_interval | false |
| SSL Server Private Key | Local path to the SSL private key file. | ssl_private_key | ssl_private_key | false | |
| SSL Server Certificate | Local path to the SSL server certificate file. | ssl_server_certificate | ssl_server_certificate | false |