Tablet Server Health Tests

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

Short Name: File Descriptors

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

Short Name: Host Health

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

Short Name: Process Status

This Tablet Server 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 Tablet Server health test checks that the Tablet 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 Tablet Server monitoring settings.

Short Name: Unexpected Exits