Flume Agent Health Tests

Flume Agent File Descriptors

This Agent health test checks that the number of file descriptors used does not rise above some percentage of the Agent 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 Agent 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.	flume_agent_fd_thresholds	critical:70.0, warning:50.0	PERCENT

Flume Agent Host Health

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

Short Name: Host Health

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

Flume Agent Log Directory Free Space

This Agent health test checks that the filesystem containing the log directory of this Agent 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 Agent 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

Flume Agent Process Status

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

Short Name: Process Status

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

Flume Agent Unexpected Exits

This Agent health test checks that the Agent 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 Agent 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

Flume Agent Web Server Status

This health test checks that the role's web 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 Agent, a misconfiguration of the Agent or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the Agent 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 Agent's web server are failing or timing out. If the test's failure message indicates an unexpected response, then the Agent's web server responded to the Cloudera Manager Agent's request, but the response could not interpreted for some reason. This test can be configured using the Web Metric Collection Agent 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.	agent_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.	agent_web_metric_collection_thresholds	critical:never, warning:10000.0	MILLISECONDS