Hive Metastore Server Health Tests

Hive Metastore Server Audit Pipeline Test

This Hive Metastore Server health test checks that the Auditing for the Hive Metastore Server role is getting processed correctly and is not blocked. A failure of this health test may indicate a problem with the audit pipeline of Hive Metastore Server process. This test can fail either because the Cloudera Audit Server is not accepting audits, or the Cloudera Manager Agent on the Hive Metastore Server host isn't able to send audits because of some network issue. Check the Cloudera Manager Agent logs and Cloudera Audit Server logs for more details. This test can be enabled or disabled using the Navigator Audit Pipeline Health Check Hive Metastore Server monitoring setting.

Short Name: Audit Pipeline Test

Property Name Description Template Name Default Value Unit
Monitoring Period For Audit Failures The period to review when checking if audits are blocked and not getting processed. mgmt_navigator_failure_window 20 MINUTES
Navigator Audit Failure Thresholds The health test thresholds for failures encountered when monitoring audits within a recent period specified by the mgmt_navigator_failure_window configuration for the role. The value that can be specified for this threshold is the number of bytes of audits data that is left to be sent to audit server. mgmt_navigator_failure_thresholds critical:any, warning:never BYTES
Navigator Audit Pipeline Health Check Enable test of audit events processing pipeline. This will test if audit events are not getting processed by Audit Server for a role that generates audit. mgmt_navigator_status_check_enabled true no unit

Hive Metastore Server File Descriptors

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

Hive Metastore Server Heap Dump Directory Free Space

This Hive Metastore Server health test checks that the filesystem containing the heap dump directory of this Hive Metastore Server has sufficient free space. This test can be configured using the Heap Dump Directory Free Space Monitoring Absolute Thresholds and Heap Dump Directory Free Space Monitoring Percentage Thresholds Hive Metastore Server monitoring settings.

Short Name: Heap Dump Directory Free Space

Property Name Description Template Name Default Value Unit
Heap Dump Directory Free Space Monitoring Absolute Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. heap_dump_directory_free_space_absolute_thresholds critical:5.36870912E9, warning:1.073741824E10 BYTES
Heap Dump Directory Free Space Monitoring Percentage Thresholds The health test thresholds for monitoring of free space on the filesystem that contains this role's heap dump directory. Specified as a percentage of the capacity on that filesystem. This setting is not used if a Heap Dump Directory Free Space Monitoring Absolute Thresholds setting is configured. heap_dump_directory_free_space_percentage_thresholds critical:never, warning:never PERCENT

Hive Metastore Server Hive Metastore Canary

The Hive Metastore health test checks every 5 minutes that a client can connect and perform basic operations. The operations include:
  • Creating a database
  • Creating a table within that database with several types of columns and two partition keys
  • Creating a number of partitions
  • Dropping both the table and the database.

The database is created under the /user/hue/.cloudera_manager_hive_metastore_canary/<Hive Metastore role name> / and is named "cloudera_manager_metastore_canary_test_db". The test returns "Bad" health if any of these operations fail. The test returns "Concerning" health if an unknown failure happens. The canary publishes a metric 'canary_duration' for the time it took for the canary to complete. The following example trigger, defined for the Hive Metastore role configuration group, changes the health to "Bad" when the time it takes for the canary to finish the testing tasks is longer than 10 seconds:

"IF (SELECT canary_duration WHERE entityName=$ROLENAME AND category = ROLE and last(canary_duration) > 10s) DO health:bad"

A failure of this health test might indicate that the Hive Metastore is failing basic operations. Check the logs of the Hive Metastore and the Cloudera Manager Service Monitor for more details. This test can be enabled or disabled using the Hive Metastore Canary Health Test Hive Metastore monitoring setting.

Short Name: Hive Metastore Canary

Property Name Description Template Name Default Value Unit
Hive Metastore Canary Health Test Enables the health test that checks that basic Hive Metastore operations succeed metastore_canary_health_enabled true no unit

Hive Metastore Server Host Health

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

Short Name: Host Health

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

Hive Metastore Server Log Directory Free Space

This Hive Metastore Server health test checks that the filesystem containing the log directory of this Hive Metastore 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 Hive Metastore 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 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

Hive Metastore Server Pause Duration

This Hive Metastore Server health test checks that the Hive Metastore Server threads are not experiencing long scheduling pauses. The test uses a pause monitoring thread in the Hive Metastore Server that tracks scheduling delay by noting if it is run on its requested schedule. If the thread is not run on its requested schedule, the delay is noted and considered pause time. The health test checks that no more than some percentage of recent time is spent paused. A failure of this health test may indicate that the Hive Metastore Server is not getting enough CPU resources, or that it is spending too much time doing garbage collection. Inspect the Hive Metastore Server logs for any pause monitor output and check garbage collection metrics exposed by the Hive Metastore Server. This test can be configured using the Pause Duration Thresholds and Pause Duration Monitoring Period Hive Metastore Server monitoring settings.

Short Name: Pause Duration

Property Name Description Template Name Default Value Unit
Pause Duration Monitoring Period The period to review when computing the moving average of extra time the pause monitor spent paused. hivemetastore_pause_duration_window 5 MINUTES
Pause Duration Thresholds The health test thresholds for the weighted average extra time the pause monitor spent paused. Specified as a percentage of elapsed wall clock time. hivemetastore_pause_duration_thresholds critical:60.0, warning:30.0 no unit

Hive Metastore Server Process Status

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

Short Name: Process Status

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

Hive Metastore Server Swap Memory Usage

This Hive Metastore 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

Property Name Description Template Name Default Value Unit
Process Swap Memory Thresholds The health test thresholds on the swap memory usage of the process. This takes precedence over the host level threshold. process_swap_memory_thresholds critical:never, warning:200.0 BYTES

Hive Metastore Server Unexpected Exits

This Hive Metastore Server health test checks that the Hive Metastore Server 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 Hive Metastore 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 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