Impala StateStore Daemon Health Checks

Impala StateStore Daemon File Descriptors

This Impala StateStore Daemon health check checks that the number of file descriptors used does not rise above some percentage of the Impala StateStore Daemon 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 Impala StateStore Daemon 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. statestore_fd_thresholds critical:70.000000, warning:50.000000 PERCENT

Impala StateStore Daemon Host Health

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

Short Name: Host Health

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

Impala StateStore Daemon Log Directory Free Space

This Impala StateStore Daemon health check checks that the filesystem containing the log directory of this Impala StateStore Daemon 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 Impala StateStore Daemon 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

Impala StateStore Daemon Process Status

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

Short Name: Process Status

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

Impala StateStore Daemon Resident Set Size

This Impala StateStore Daemon health check checks that the size of the resident set does not rise above a configured threshold value. A failure of this health check may indicates that the Impala StateStore Daemon process is consuming more memory than expected. It is possible that that unexpected memory consumption may lead to swapping and decreased performance for processes running on the same host as this Impala StateStore Daemon. Increased Impala StateStore Daemon memory consumption may be caused by an increased workload on the Impala service, or by a bug in the Impala StateStore Daemon software. To avoid failures of this health check, free up additional memory for this Impala StateStore Daemon process and increase the Resident Set Size Thresholds monitoring setting. This test can be configured using the Resident Set Size Thresholds Impala StateStore Daemon monitoring setting.

Short Name: Resident Set Size

Property Name Description Template Name Default Value Unit
Resident Set Size Thresholds The health check thresholds on the resident size of the process. process_resident_set_size_thresholds critical:never, warning:never BYTES

Impala StateStore Daemon Unexpected Exits

This Impala StateStore Daemon health check checks that the Impala StateStore Daemon 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 Impala StateStore Daemon 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

Impala StateStore Daemon Web Server Status

This Impala StateStore Daemon health check checks that the web server of the Impala StateStore Daemon 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 check may indicate a problem with the web server of the Impala StateStore Daemon, a misconfiguration of the Impala StateStore Daemon or a problem with the Cloudera Manager agent. Consult the Cloudera Manager agent logs and the logs of the Impala StateStore Daemon 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 Impala StateStore Daemon's web server are failing or timing out. These requests are completely local to the Impala StateStore Daemon's host, and so should never fail under normal conditions. If the test's failure message indicates an unexpected response, then the Impala StateStore Daemon's web server responded to the Cloudera Manager Agent's request, but the Cloudera Manager Agent could not interpret the response for some reason. This test can be configured using the Web Metric Collection Impala StateStore Daemon monitoring setting.

Short Name: Web Server Status

Property Name Description Template Name Default Value Unit
Web Metric Collection Enables the health check that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. statestore_web_metric_collection_enabled true no unit