Navigator Server Health Checks

Navigator Server File Descriptors

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

Short Name: File Descriptors

Property Name Description Template Name Default Value Unit
File Descriptor Monitoring Thresholds The health check thresholds of the number of file descriptors used. Specified as a percentage of file descriptor limit. navigator_fd_thresholds critical:70.000000, warning:50.000000 PERCENT

Navigator Server Host Health

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

Short Name: Host Health

Property Name Description Template Name Default Value Unit
Navigator Host Health Check When computing the overall Navigator health, consider the host's health. navigator_host_health_enabled true no unit

Navigator Server Log Directory Free Space

This Navigator Server health check checks that the filesystem containing the log directory of this Navigator 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 Navigator 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 check thresholds for monitoring of free space on the filesystem that contains this role's log directory. log_directory_free_space_absolute_thresholds critical:5368709120.000000, warning:10737418240.000000 BYTES
Log Directory Free Space Monitoring Percentage Thresholds The health check 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

Navigator Server Process Status

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

Short Name: Process Status

Property Name Description Template Name Default Value Unit
Navigator Process Health Check Enables the health check that the Navigator's process state is consistent with the role configuration navigator_scm_health_enabled true no unit

Navigator Server Unexpected Exits

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