Tracer Health Tests

Tracer File Descriptors

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

Tracer Host Health

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

Short Name: Host Health

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

Tracer Process Status

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

Short Name: Process Status

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

Tracer Swap Memory Usage

This Tracer 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

Property Name Description Template Name Default Value Unit
Process Swap Memory Thresholds The health test thresholds on the swap memory usage of the process. process_swap_memory_thresholds critical:never, warning:any BYTES

Tracer Unexpected Exits

This Tracer health test checks that the Tracer 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 Tracer 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