Wenzhe Zhou created IMPALA-12155:
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Summary: Support Impala CatalogD HA
Key: IMPALA-12155
URL: https://issues.apache.org/jira/browse/IMPALA-12155
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Wenzhe Zhou
Assignee: Wenzhe Zhou
To support catalog HA, we need to have two CatalogD in HA pair, and add the
preemptive behavior for Catalogd. When CatalogD HA is enabled, the preemptive
behavior allows the CatalogD with the higher priority to become active and the
paired CatalogD becomes standby. The active CatalogD acts as the source of
metadata and provides catalog service for the Impala cluster. When active
CatalogD is not healthy, the standby CatalogD will take over catalog service.
Preemption is disabled on the CatalogD when it is not running as HA pair.
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