Hue Properties in CDH 5.0.0

Role groups:

hueserverdefaultgroup

Advanced

Display Name Description Related Name Default Value API Name Required
Hue Server 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 this role except client configuration. HUE_SERVER_role_env_safety_valve false
Top Banner Custom HTML An optional, custom one-line HTML code to display as a banner on top of all Hue Server web pages. Useful in displaying cluster identity of the Hue Server. banner_top_html banner_html false
Hue Server Advanced Configuration Snippet (Safety Valve) for hue_safety_valve_server.ini For advanced use only, a string to be inserted into hue_safety_valve_server.ini for this role only. hue_server_hue_safety_valve false
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
Hue Server Log Directory Directory where Hue Server will place its log files. /var/log/hue hue_server_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
Heap Dump Directory Free Space Monitoring Absolute Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Warning: 10 GiB, Critical: 5 GiB heap_dump_directory_free_space_absolute_thresholds false
Heap Dump Directory Free Space Monitoring Percentage Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured. Warning: Never, Critical: Never heap_dump_directory_free_space_percentage_thresholds 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 % hue_server_fd_thresholds false
Hue Server Host Health Test When computing the overall Hue Server health, consider the host's health. true hue_server_host_health_enabled false
Hue Server Process Health Test Enables the health test that the Hue Server's process state is consistent with the role configuration true hue_server_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
Process Swap Memory Thresholds The health test thresholds on the swap memory usage of the process. Warning: Any, Critical: Never process_swap_memory_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:
  • triggerName (mandatory) - The name of the trigger. This value must be unique for the specific role.
  • triggerExpression (mandatory) - A tsquery expression representing the trigger.
  • streamThreshold (optional) - The maximum number of streams that can satisfy a condition of a trigger before the condition fires. By default set to 0, and any stream returned causes the condition to fire.
  • enabled (optional) - By default set to 'true'. If set to 'false', the trigger will not be evaluated.
  • expressionEditorConfig (optional) - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here may lead to inconsistencies.
For example, the following JSON formatted trigger configured for a DataNode fires if the DataNode has more than 1500 file-descriptors opened:[{"triggerName": "sample-trigger", "triggerExpression": "IF (SELECT fd_open WHERE roleName=$ROLENAME and last(fd_open) > 1500) DO health:bad", "streamThreshold": 0, "enabled": "true"}]See the trigger rules documentation for more details on how to write triggers using tsquery.The JSON format is evolving and may change in the future and, as a result, backward compatibility is not guaranteed between releases at this time.		 [] 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
HiveServer2 and Impala Thrift Connection Timeout Timeout in seconds for Thrift calls to HiveServer2 and Impala. server_conn_timeout 2 minute(s) hs2_conn_timeout false
Jobsub Examples and Templates Directory Location on HDFS where the jobsub examples and templates are stored. remote_data_dir /user/hue/jobsub hue_server_remote_data_dir true
Secret Key Random string used for secure hashing in the session store. secret_key secret_key false
Local Path to SSL Certificate Path to the SSL certificate on the host running the Hue web server. This file must be readable by the Hue system user. ssl_certificate ssl_certificate false
Enable HTTPS Enable HTTPS for the Hue web server. false ssl_enable false
Local Path to SSL Private Key Path to the SSL private key on the host running the Hue web server. This file must be readable by the Hue system user. Hue only supports a key without a passphrase. ssl_private_key ssl_private_key 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
Hue HTTP Port Port to use to connect to the Hue server. http_port 8888 hue_http_port false
Bind Hue Server to Wildcard Address If enabled, the Hue server binds to the wildcard address ("0.0.0.0") for its ports. false hue_server_bind_wildcard 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

kerberosticketrenewerdefaultgroup

Advanced

Display Name Description Related Name Default Value API Name Required
Kerberos Ticket Renewer 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 this role except client configuration. KT_RENEWER_role_env_safety_valve false
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
Kerberos Ticket Renewer Log Directory Directory where Kerberos Ticket Renewer will place its log files. /var/log/hue kt_renewer_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
Heap Dump Directory Free Space Monitoring Absolute Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Warning: 10 GiB, Critical: 5 GiB heap_dump_directory_free_space_absolute_thresholds false
Heap Dump Directory Free Space Monitoring Percentage Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured. Warning: Never, Critical: Never heap_dump_directory_free_space_percentage_thresholds 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 % kt_renewer_fd_thresholds false
Kerberos Ticket Renewer Host Health Test When computing the overall Kerberos Ticket Renewer health, consider the host's health. true kt_renewer_host_health_enabled false
Kerberos Ticket Renewer Process Health Test Enables the health test that the Kerberos Ticket Renewer's process state is consistent with the role configuration true kt_renewer_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
Process Swap Memory Thresholds The health test thresholds on the swap memory usage of the process. Warning: Any, Critical: Never process_swap_memory_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:
  • triggerName (mandatory) - The name of the trigger. This value must be unique for the specific role.
  • triggerExpression (mandatory) - A tsquery expression representing the trigger.
  • streamThreshold (optional) - The maximum number of streams that can satisfy a condition of a trigger before the condition fires. By default set to 0, and any stream returned causes the condition to fire.
  • enabled (optional) - By default set to 'true'. If set to 'false', the trigger will not be evaluated.
  • expressionEditorConfig (optional) - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here may lead to inconsistencies.
For example, the following JSON formatted trigger configured for a DataNode fires if the DataNode has more than 1500 file-descriptors opened:[{"triggerName": "sample-trigger", "triggerExpression": "IF (SELECT fd_open WHERE roleName=$ROLENAME and last(fd_open) > 1500) DO health:bad", "streamThreshold": 0, "enabled": "true"}]See the trigger rules documentation for more details on how to write triggers using tsquery.The JSON format is evolving and may change in the future and, as a result, backward compatibility is not guaranteed between releases at this time.		 [] 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
Hue Keytab Renewal Interval Interval in seconds with which Hue's Kerberos ticket will get renewed. reinit_frequency 1 hour(s) keytab_reinit_frequency 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

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

service_wide

Advanced

Display Name Description Related Name Default Value API Name Required
Enable Django Debug Mode In debug mode, Django displays a detailed traceback when an exception occurs. Debugging information may contain sensitive data. Django remembers every SQL query it executes in debug mode, which will rapidly consume memory. django_debug_mode false django_debug_enable false
Enable Debugging of Internal Server Error Responses Enable debug output in HTTP Internal Server Error (status 500) responses. Debugging information may contain sensitive data. If Enable Django Debug Mode is set, this is automatically enabled. http_500_debug_mode false http_500_debug_enable false
Hue 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. hue_service_env_safety_valve false
Hue Service Advanced Configuration Snippet (Safety Valve) for hue_safety_valve.ini For advanced use only, a string to be inserted into hue_safety_valve.ini. Applies to configurations of all roles in this service except client configuration. hue_service_safety_valve false
System Group The group that this service's processes should run as. hue process_groupname true
System User The user that this service's processes should run as. hue process_username true
Enable Usage Data Collection When you enable anonymous usage data collection Hue tracks anonymised pages and application versions in order to gather information about each application's usage levels. The data collected does not include any hostnames or IDs. Data collection option is available on CDH 4.4 and later deployments. collect_usage true usage_data_collection_enable false

Database

Display Name Description Related Name Default Value API Name Required
Hue Database Directory If the database is SQLite3, this is the filename of the database to use, and the directory of this file must be writable by the 'hue' user. dir /var/lib/hue/desktop.db database_dir false
Database Dump File File where the database gets dumped to or loaded from. /tmp/hue_database_dump.json database_dump_file true
Hue Database Hostname Name of host where the Hue database is running. Not necessary for SQLite3. host localhost database_host false
Hue Database Name Name of Hue database. name hue database_name false
Hue Database Password Password for Hue database. Not necessary for SQLite3. password database_password false
Hue Database Port Port on host where the Hue database is running. Not necessary for SQLite3. port 3306 database_port false
Hue Database Type Type of database used for Hue engine sqlite3 database_type false
Hue Database Username The username to use to log into the Hue database. Not necessary for SQLite3. user hue database_user false

Monitoring

Display Name Description Related Name Default Value API Name Required
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
Beeswax Server Role Health Test When computing the overall HUE health, consider Beeswax Server's health true hue_beeswax_server_health_enabled false
Healthy Hue Server Monitoring Thresholds The health test thresholds of the overall Hue Server health. The check returns "Concerning" health if the percentage of "Healthy" Hue Servers falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Hue Servers falls below the critical threshold. Warning: 99.0 %, Critical: 51.0 % hue_hue_servers_healthy_thresholds false
Healthy Kerberos Ticket Renewer Monitoring Thresholds The health test thresholds of the overall Kerberos Ticket Renewer health. The check returns "Concerning" health if the percentage of "Healthy" Kerberos Ticket Renewers falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Kerberos Ticket Renewers falls below the critical threshold. Warning: 99.0 %, Critical: 51.0 % hue_kt_renewers_healthy_thresholds 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:
  • triggerName (mandatory) - The name of the trigger. This value must be unique for the specific service.
  • triggerExpression (mandatory) - A tsquery expression representing the trigger.
  • streamThreshold (optional) - The maximum number of streams that can satisfy a condition of a trigger before the condition fires. By default set to 0, and any stream returned causes the condition to fire.
  • enabled (optional) - By default set to 'true'. If set to 'false', the trigger will not be evaluated.
  • expressionEditorConfig (optional) - Metadata for the trigger editor. If present, the trigger should only be edited from the Edit Trigger page; editing the trigger here may lead to inconsistencies.
For example, the followig JSON formatted trigger fires if there are more than 10 DataNodes with more than 500 file-descriptors opened:[{"triggerName": "sample-trigger", "triggerExpression": "IF (SELECT fd_open WHERE roleType = DataNode and last(fd_open) > 500) DO health:bad", "streamThreshold": 10, "enabled": "true"}]See the trigger rules documentation for more details on how to write triggers using tsquery.The JSON format is evolving and may change in the future and, as a result, backward compatibility is not guaranteed between releases at this time.		 [] 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

Other

Display Name Description Related Name Default Value API Name Required
Blacklist Comma-separated list of regular expressions, which match any prefix of 'host:port/path' of requested proxy target. This does not support matching GET parameters. blacklist () blacklist false
Hue Web Server Threads Number of threads used by the Hue web server. cherrypy_server_threads 50 cherrypy_server_threads false
Default Site Encoding Default encoding for site data. default_site_encoding utf default_site_encoding false
Default User Group The name of a default group that users will be added to at creation time. default_user_group default_user_group false
HBase Service Name of the HBase service that this Hue service instance depends on hbase_service false
HDFS Temporary Directory HDFS directory used for storing temporary files. temp_dir /tmp hdfs_tmp_dir false
Hive Service Name of the Hive service that this Hue service instance depends on hive_service true
HBase Thrift Server Thrift server to use for HBase app. hue_hbase_thrift false
HDFS Web Interface Role HTTPFS role or Namenode (if webhdfs is enabled) that hue can use to communicate with HDFS. webhdfs_url hue_webhdfs true
Impala Service Name of the Impala service that this Hue service instance depends on impala_service false
Oozie Service Name of the Oozie service that this Hue service instance depends on oozie_service true
Solr Service Name of the Solr service that this Hue service instance depends on solr_service false
Sqoop Service Name of the Sqoop service that this Hue service instance depends on sqoop_service false
Time Zone Time zone name. time_zone America/Los_Angeles time_zone false
User Augmentor Class that defines extra accessor methods for user objects. user_augmentor desktop.auth.backend.DefaultUserAugmentor user_augmentor false
Whitelist Comma-separated list of regular expressions, which match 'host:port' of requested proxy target. whitelist (localhost|127\.0\.0\.1):(50030|50070|50060|50075) whitelist false
ZooKeeper Service Name of the ZooKeeper service that this Hue service instance depends on zookeeper_service false

Security

Display Name Description Related Name Default Value API Name Required
Authentication Backend Mode of authenticating login credentials. Select desktop.auth.backend.LdapBackend to use LDAP to authenticate login credentials. LDAP requires you to also set the LDAP URL, NT Domain, and optionally LDAP certificate if you are using secure LDAP. Select desktop.auth.backend.PamBackend to use PAM to authenticate login credentials. backend desktop.auth.backend.AllowFirstUserDjangoBackend auth_backend false
LDAP Search Base The distinguished name to use as a search base for finding users and groups. This should be similar to 'dc=hadoop,dc=mycompany,dc=com'. base_dn base_dn false
LDAP Bind User Distinguished name of the user to bind as. Not required if the LDAP server supports anonymous searches. For Active Directory, this would be similar to 'hadoop-admin@mycompany.com'. bind_dn bind_dn false
LDAP Bind Password The password of the bind user. bind_password bind_password false
Create LDAP users on login Create users in Hue when they try to login with their LDAP credentials. For use when using LdapBackend for Hue authentication. create_users_on_login true create_users_on_login false
LDAP Group Filter Base filter for searching for groups. For Active Directory, this is typically '(objectClass=group)'. group_filter group_filter false
LDAP Group Membership Attribute The attribute of the group object that identifies the members of the group. For Active Directory, this is typically 'member'. group_member_attr group_member_attr false
LDAP Group Name Attribute The group name attribute in the LDAP schema. For Active Directory, this is typically 'cn'. group_name_attr group_name_attr false
Kerberos Principal Kerberos principal short name used by all roles of this service. hue kerberos_princ_name true
LDAP Certificate LDAP certificate for authentication over TLS ldap_cert ldap_cert false
LDAP URL The URL of the LDAP Server; similar to 'ldap://auth.mycompany.com' or 'ldaps://auth.mycompany.com'. ldap_url ldap_url false
LDAP Username Pattern LDAP Username Pattern for use with non-Active Directory LDAP implementations. Must contain the special '<username>' string for replacement during authentication. ldap_username_pattern ldap_username_pattern false
NT Domain Only applies to Active Directory. The Active Directory Domain will be similar to 'MYCOMPANY.COM'. nt_domain nt_domain false
Use Search Bind Authentication Search Bind Authentication connects to the LDAP server using credentials provided in the 'bind_dn' and 'bind_password' configurations. If these configurations are not set, then an anonymous search is performed. search_bind_authentication false search_bind_authentication false
Use StartTLS Whether to use StartTLS (as opposed to ldaps) to communicate securely with the LDAP server. This is only effective when the LDAP certificate is specified. use_start_tls true use_start_tls false
LDAP User Filter The base filter for searching for users. For Active Directory, this is typically '(objectClass=user)'. user_filter user_filter false
LDAP Username Attribute The username attribute in the LDAP schema. For Active Directory, this is typically 'sAMAccountName'. user_name_attr user_name_attr false