Impala Health Tests

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

Impala Catalog Server Role Health Test

Description

When computing the overall IMPALA health, consider Impala Catalog Server's health

Template Name

impala_catalogserver_health_enabled

Default Value

true

Unit(s)

no unit

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 Daemon Health

Healthy Impala Daemon Monitoring Thresholds

Description

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.

Template Name

impala_impalads_healthy_thresholds

Default Value

critical:90.0, warning:95.0

Unit(s)

PERCENT

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

Short Name: Impala Llama ApplicationMaster Health

Healthy Impala Llama ApplicationMaster Monitoring Thresholds

Description

The health test thresholds of the overall Impala Llama ApplicationMaster health. The check returns "Concerning" health if the percentage of "Healthy" Impala Llama ApplicationMasters falls below the warning threshold. The check is unhealthy if the total percentage of "Healthy" and "Concerning" Impala Llama ApplicationMasters falls below the critical threshold.

Template Name

impala_llamas_healthy_thresholds

Default Value

critical:51.0, warning:99.0

Unit(s)

PERCENT

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

Impala StateStore Role Health Test

Description

When computing the overall IMPALA health, consider Impala StateStore's health

Template Name

impala_statestore_health_enabled

Default Value

true

Unit(s)

no unit