Impala Health Tests

Impala Assignment Locality

This is an Impala service-level health test that checks that a sufficient percentage of recent assignments are operating on local data. The test returns "Concerning" or "Bad" health if the number of assignments operating on local data falls below a warning or critical thresholds. The number of assignments observed during the test's window must be above a configured minimum number of assignments for the test to be enabled. A failure of this health test may indicate problems with the configuration of the Impala service. Check that each Impala Daemon is co-located with a DataNode, and that the IP address of each Impala Daemon matches the IP address of its co-located DataNode. This test can be configured using the Assignment Locality Ratio Thresholds, Assignment Locality Monitoring Period and Assignment Locality Minimum Assignments Impala service-wide monitoring settings.

Short Name: Assignment Locality

Property Name	Description	Template Name	Default Value	Unit
Assignment Locality Minimum Assignments	The minimum number of assignments that must occur during the test time period before the threshold values will be checked. Until this number of assignments have been observed in the test time period the health test will be disabled.	impala_assignment_locality_minimum	10	no unit
Assignment Locality Monitoring Period	The time period over which to compute the assignment locality ratio. Specified in minutes.	impala_assignment_locality_window	15	MINUTES
Assignment Locality Ratio Thresholds	The health test thresholds for assignment locality. Specified as a percentage of total assignments.	impala_assignment_locality_thresholds	critical:5.0, warning:80.0	PERCENT

Impala Catalog Server Health

This Impala service-level health test checks for the presence of a running, healthy Impala Catalog Server. The test returns "Bad" health if the service is running and the Impala Catalog Server is not running. In all other cases it returns the health of the Impala Catalog Server. A failure of this health test indicates a stopped or unhealthy Impala Catalog Server. Check the status of the Impala Catalog Server for more information. This test can be enabled or disabled using the Impala Catalog Server Role Health Test Impala Catalog Server service-wide monitoring setting.

Short Name: Impala Catalog Server Health

Property Name	Description	Template Name	Default Value	Unit
Impala Catalog Server Role Health Test	When computing the overall IMPALA health, consider Impala Catalog Server's health	impala_catalogserver_health_enabled	true	no unit

Impala Daemons Health

This is a Impala service-level health test that checks that enough of the Impala Daemons in the cluster are healthy. The test returns "Concerning" health if the number of healthy Impala Daemons falls below a warning threshold, expressed as a percentage of the total number of Impala Daemons. The test returns "Bad" health if the number of healthy and "Concerning" Impala Daemons falls below a critical threshold, expressed as a percentage of the total number of Impala Daemons. For example, if this test is configured with a warning threshold of 95% and a critical threshold of 90% for a cluster of 100 Impala Daemons, this test would return "Good" health if 95 or more Impala Daemons have good health. This test would return "Concerning" health if at least 90 Impala Daemons have either "Good" or "Concerning" health. If more than 10 Impala Daemons have bad health, this test would return "Bad" health. A failure of this health test indicates unhealthy Impala Daemons. Check the status of the individual Impala Daemons for more information. This test can be configured using the Impala Impala service-wide monitoring setting.

Short Name: Impala Daemons Health

Property Name	Description	Template Name	Default Value	Unit
Healthy Impala Daemon Monitoring Thresholds	The health test thresholds of the overall Impala Daemon health. The check returns "Concerning" health if the percentage of "Healthy" Impala Daemons falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Impala Daemons falls below the critical threshold.	impala_impalads_healthy_thresholds	critical:90.0, warning:95.0	PERCENT

Impala Llama ApplicationMaster (beta) Health

This Impala service-level health test checks for the presence of a running, healthy Impala Llama ApplicationMaster (beta). The test returns "Bad" health if the service is running and the Impala Llama ApplicationMaster (beta) is not running. In all other cases it returns the health of the Impala Llama ApplicationMaster (beta). A failure of this health test indicates a stopped or unhealthy Impala Llama ApplicationMaster (beta). Check the status of the Impala Llama ApplicationMaster (beta) for more information. This test can be enabled or disabled using the Impala Llama ApplicationMaster (beta) Role Health Test Impala Llama ApplicationMaster (beta) service-wide monitoring setting.

Short Name: Impala Llama ApplicationMaster (beta) Health

Property Name	Description	Template Name	Default Value	Unit
Impala Llama ApplicationMaster (beta) Role Health Test	When computing the overall IMPALA health, consider Impala Llama ApplicationMaster (beta)'s health	impala_llama_health_enabled	true	no unit

Impala StateStore Health

This Impala service-level health test checks for the presence of a running, healthy Impala StateStore. The test returns "Bad" health if the service is running and the Impala StateStore is not running. In all other cases it returns the health of the Impala StateStore. A failure of this health test indicates a stopped or unhealthy Impala StateStore. Check the status of the Impala StateStore for more information. This test can be enabled or disabled using the Impala StateStore Role Health Test Impala StateStore service-wide monitoring setting.

Short Name: Impala StateStore Health

Property Name	Description	Template Name	Default Value	Unit
Impala StateStore Role Health Test	When computing the overall IMPALA health, consider Impala StateStore's health	impala_statestore_health_enabled	true	no unit