Impala Llama ApplicationMaster Health Tests

Impala Llama ApplicationMaster File Descriptors

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

Impala Llama ApplicationMaster Heap Dump Directory Free Space

This Impala Llama ApplicationMaster health test checks that the filesystem containing the heap dump directory of this Impala Llama ApplicationMaster 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 Impala Llama ApplicationMaster 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

Impala Llama ApplicationMaster Host Health

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

Short Name: Host Health

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

Impala Llama ApplicationMaster Log Directory Free Space

This Impala Llama ApplicationMaster health test checks that the filesystem containing the log directory of this Impala Llama ApplicationMaster 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 Llama ApplicationMaster 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 Llama ApplicationMaster Process Status

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

Short Name: Process Status

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

Impala Llama ApplicationMaster Swap Memory Usage

This Impala Llama ApplicationMaster 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

Impala Llama ApplicationMaster Unexpected Exits

This Impala Llama ApplicationMaster health test checks that the Impala Llama ApplicationMaster 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 Impala Llama ApplicationMaster 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