This is a Service Monitor health test that checks if the Cloudera Manager descriptor has been refreshed recently. The Cloudera Manager descriptor is used to pass configuration information from the Cloudera Manager Server to the Service Monitor. If the descriptor becomes stale, Service Monitor operation may be impacted because the Service Monitor will receive information about new hosts, roles, and services, or changes to existing hosts, roles, and services. A stale descriptor usually indicates problems communicating with the Cloudera Manager Server but can also indicate performance problems or a bug. Consult the Service Monitor log and the Cloudera Manager Server log for more information. This test can be configured using the Cloudera Manager Descriptor Age Thresholds Cloudera Manager Service Monitor setting.

Short Name: Cloudera Manager Descriptor Age

This is a Service Monitor health test that checks if the Cloudera Manager metric schema has been refreshed recently. If the metric schema becomes stale, Service Monitor operation may be impacted because the Service Monitor will not receive information about new metrics and changes to existing metrics. A stale metric schema usually indicates problems communicating with the Cloudera Manager Server but can also indicate performance problems or a bug. Consult the Service Monitor log and the Cloudera Manager Server log for more information. This test can be configured using the Cloudera Manager Metric Schema Age Thresholds Cloudera Manager Service Monitor setting.

Short Name: Cloudera Manager Metric Schema Age

This Service Monitor health test checks that the number of file descriptors used does not rise above some percentage of the Service Monitor 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 Service Monitor monitoring setting.

Short Name: File Descriptors

This Service Monitor health test checks that the filesystem containing the heap dump directory of this Service Monitor has sufficient free space. This test can be configured using the Heap Dump Directory Free Space Monitoring Absolute Thresholds and Heap Dump Directory Free Space Monitoring Percentage Thresholds Service Monitor monitoring settings.

Short Name: Heap Dump Directory Free Space

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

Short Name: Host Health

This Service Monitor health test checks that the filesystem containing the log directory of this Service Monitor 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 Service Monitor monitoring settings.

Short Name: Log Directory Free Space

This Service Monitor health test checks that the Service Monitor threads are not experiencing long scheduling pauses. The test uses a pause monitoring thread in the Service Monitor that tracks scheduling delay by noting if it is run on its requested schedule. If the thread is not run on its requested schedule, the delay is noted and considered pause time. The health test checks that no more than some percentage of recent time is spent paused. A failure of this health test may indicate that the Service Monitor is not getting enough CPU resources, or that it is spending too much time doing garbage collection. Inspect the Service Monitor logs for any pause monitor output and check garbage collection metrics exposed by the Service Monitor. This test can be configured using the Pause Duration Thresholds and Pause Duration Monitoring Period Service Monitor monitoring settings.

Short Name: Pause Duration

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

Short Name: Process Status

This Service Monitor health test checks that no messages are being dropped by the role stage of the Service Monitor pipeline. A failure of this health test indicates a problem with the Service Monitor. This may indicate a configuration problem or a bug in the Service Monitor. This test can be configured using the Service Monitor Role Pipeline Monitoring Time Period monitoring setting.

Short Name: Role Pipeline

This is a Service Monitor health test that checks that the filesystem containing the Service Monitor Storage Directory of this Service Monitor has sufficient free space. See the Service Monitor Storage Directory description on the Service Monitor configuration page for more information on this directory type. This test can be configured using the Service Monitor Storage Directory Free Space Monitoring Absolute Thresholds and Service Monitor Storage Directory Free Space Monitoring Percentage Thresholds Service Monitor monitoring settings.

Short Name: Service Monitor Storage Directory Free Space

This Service Monitor health test checks the amount of swap memory in use by the role. A failure of this health test may indicate that your machine is overloaded. This test can be configured using the Process Swap Memory Thresholds monitoring settings.

Short Name: Swap Memory Usage

This Service Monitor health test checks that the Service Monitor has not recently exited unexpectedly. The test returns "Bad" health if the number of unexpected exits exceeds a critical threshold. For example, if this test is configured with a critical threshold of 1, this test returns "Good" health if there have been no unexpected exits recently. If 1 or more unexpected exits occured recently, this test returns "Bad" health. The test also indicates whether any of the exits were caused by an OutOfMemory error if the Cloudera Manager Kill When Out of Memory monitoring setting is enabled. This test can be configured using the Unexpected Exits Thresholds and Unexpected Exits Monitoring Period Service Monitor monitoring settings.

Short Name: Unexpected Exits

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. Failure of this health test may indicate a problem with the web server of the Service Monitor, a misconfiguration of the Service Monitor, or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the Service Monitor for more detail. If the test failure message indicates a communication problem, the Cloudera Manager Agent's HTTP requests to the Service Monitor's web server are failing or timing out. If the test's failure message indicates an unexpected response, the Service Monitor's web server responded to the Cloudera Manager Agent's request, but the response could not be interpreted for some reason. This test can be configured using the Web Metric Collection Service Monitor monitoring setting.

Short Name: Web Server Status