JobHistory Server Health Tests

JobHistory Server File Descriptors

This JobHistory Server health test checks that the number of file descriptors used does not rise above some percentage of the JobHistory Server file descriptor limit. A failure of this health test may indicate a bug in either Hadoop or Cloudera Manager. Contact Cloudera support. This test can be configured using the File Descriptor Monitoring Thresholds JobHistory Server monitoring setting.

Short Name: File Descriptors

Property Name	Description	Template Name	Default Value	Unit
File Descriptor Monitoring Thresholds	The health test thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit.	jobhistory_fd_thresholds	critical:70.0, warning:50.0	PERCENT

JobHistory Server GC Duration

This JobHistory Server health test checks that the JobHistory Server is not spending too much time performing Java garbage collection. It checks that no more than some percentage of recent time is spent performing Java garbage collection. A failure of this health test may indicate a capacity planning problem or misconfiguration of the JobHistory Server. This test can be configured using the Garbage Collection Duration Thresholds and Garbage Collection Duration Monitoring Period JobHistory Server monitoring settings.

Short Name: GC Duration

Property Name	Description	Template Name	Default Value	Unit
Garbage Collection Duration Monitoring Period	The period to review when computing the moving average of garbage collection time.	jobhistory_gc_duration_window	5	MINUTES
Garbage Collection Duration Thresholds	The health test thresholds for the weighted average time spent in Java garbage collection. Specified as a percentage of elapsed wall clock time.	jobhistory_gc_duration_thresholds	critical:60.0, warning:30.0	no unit

JobHistory Server Host Health

This JobHistory Server health test factors in the health of the host upon which the JobHistory Server is running. A failure of this test means that the host running the JobHistory Server is experiencing some problem. See that host's status page for more details.This test can be enabled or disabled using the JobHistory Server Host Health Test JobHistory Server monitoring setting.

Short Name: Host Health

Property Name	Description	Template Name	Default Value	Unit
JobHistory Server Host Health Test	When computing the overall JobHistory Server health, consider the host's health.	jobhistory_host_health_enabled	true	no unit

JobHistory Server Log Directory Free Space

This JobHistory Server health test checks that the filesystem containing the log directory of this JobHistory Server has sufficient free space. This test can be configured using the Log Directory Free Space Monitoring Absolute Thresholds and Log Directory Free Space Monitoring Percentage Thresholds JobHistory Server monitoring settings.

Short Name: Log Directory Free Space

Property Name	Description	Template Name	Default Value	Unit
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.	log_directory_free_space_absolute_thresholds	critical:5.36870912E9, warning:1.073741824E10	BYTES
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.	log_directory_free_space_percentage_thresholds	critical:never, warning:never	PERCENT

JobHistory Server Process Status

This JobHistory Server health test checks that the Cloudera Manager Agent on the JobHistory Server host is heart beating correctly and that the process associated with the JobHistory Server role is in the state expected by Cloudera Manager. A failure of this health test may indicate a problem with the JobHistory Server process, a lack of connectivity to the Cloudera Manager Agent on the JobHistory Server host, or a problem with the Cloudera Manager Agent. This test can fail either because the JobHistory Server has crashed or because the JobHistory Server will not start or stop in a timely fashion. Check the JobHistory Server logs for more details. If the test fails because of problems communicating with the Cloudera Manager Agent on the JobHistory Server host, check the status of the Cloudera Manager Agent by running /etc/init.d/cloudera-scm-agent status on the JobHistory Server host, or look in the Cloudera Manager Agent logs on the JobHistory Server host for more details. This test can be enabled or disabled using the JobHistory Server Process Health Test JobHistory Server monitoring setting.

Short Name: Process Status

Property Name	Description	Template Name	Default Value	Unit
JobHistory Server Process Health Test	Enables the health test that the JobHistory Server's process state is consistent with the role configuration	jobhistory_scm_health_enabled	true	no unit

JobHistory Server Unexpected Exits

This JobHistory Server health test checks that the JobHistory Server has not recently exited unexpectedly. The test returns "Bad" health if the number of unexpected exits goes above a critical threshold. For example, if this test is configured with a critical threshold of 1, this test would return "Good" health if there have been no unexpected exits recently. If there has been 1 or more unexpected exits recently, this test would return "Bad" health. This test can be configured using the Unexpected Exits Thresholds and Unexpected Exits Monitoring Period JobHistory Server monitoring settings.

Short Name: Unexpected Exits

Property Name	Description	Template Name	Default Value	Unit
Unexpected Exits Monitoring Period	The period to review when computing unexpected exits.	unexpected_exits_window	5	MINUTES
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.	unexpected_exits_thresholds	critical:any, warning:never	no unit

JobHistory Server Web Server Status

This JobHistory Server health test checks that the web server of the JobHistory Server is responding quickly to requests by the Cloudera Manager Agent, and that the Cloudera Manager Agent can collect metrics from the web server. A failure of this health test may indicate a problem with the web server of the JobHistory Server, a misconfiguration of the JobHistory Server or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the JobHistory Server for more detail. If the test's failure message indicates a communication problem, this means that the Cloudera Manager Agent's HTTP requests to the JobHistory Server's web server are failing or timing out. These requests are completely local to the JobHistory Server's host, and so should never fail under normal conditions. If the test's failure message indicates an unexpected response, then the JobHistory Server's web server responded to the Cloudera Manager Agent's request, but the Cloudera Manager Agent could not interpret the response for some reason. This test can be configured using the Web Metric Collection JobHistory Server monitoring setting.

Short Name: Web Server Status

Property Name	Description	Template Name	Default Value	Unit
Web Metric Collection	Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server.	jobhistory_web_metric_collection_enabled	true	no unit
Web Metric Collection Duration	The health test thresholds on the duration of the metrics request to the web server.	jobhistory_web_metric_collection_thresholds	critical:never, warning:10000.0	MILLISECONDS