Impala StateStore Health Tests

Impala StateStore File Descriptors

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

Impala StateStore Host Health

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

Short Name: Host Health

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

Impala StateStore Log Directory Free Space

This Impala StateStore health test checks that the filesystem containing the log directory of this Impala StateStore 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 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 test thresholds for monitoring of free space on the filesystem that contains this role's log directory. log_directory_free_space_absolute_thresholds critical:5.36870912E9, warning:1.073741824E10 BYTES
Log Directory Free Space Monitoring Percentage Thresholds The health test 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 Process Status

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

Short Name: Process Status

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

Impala StateStore Resident Set Size

This Impala StateStore health test checks that the size of the resident set does not rise above a configured threshold value. A failure of this health test may indicates that the Impala StateStore 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. Increased Impala StateStore memory consumption may be caused by an increased workload on the Impala service, or by a bug in the Impala StateStore software. To avoid failures of this health test, free up additional memory for this Impala StateStore process and increase the Resident Set Size Thresholds monitoring setting. This test can be configured using the Resident Set Size Thresholds Impala StateStore monitoring setting.

Short Name: Resident Set Size

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

Impala StateStore Unexpected Exits

This Impala StateStore health test checks that the Impala StateStore 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 Impala StateStore 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

Impala StateStore Web Server Status

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 Impala StateStore, a misconfiguration of the Impala StateStore or a problem with the Cloudera Manager Agent. Consult the Cloudera Manager Agent logs and the logs of the Impala StateStore for more detail. If the test's failure message indicates a communication problem, the Cloudera Manager Agent's HTTP requests to the Impala StateStore's web server are failing or timing out. If the test's failure message indicates an unexpected response, the Impala StateStore'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 Impala StateStore monitoring setting.

Short Name: Web Server Status

Property Name Description Template Name Default Value Unit
Web Metric Collection Enables the health test that the Cloudera Manager Agent can successfully contact and gather metrics from the web server. statestore_web_metric_collection_enabled true no unit
Web Metric Collection Duration The health test thresholds on the duration of the metrics request to the web server. statestore_web_metric_collection_thresholds critical:never, warning:10000.0 MILLISECONDS