Wenzhe Zhou created IMPALA-12286:
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Summary: Make leader election robust for Impala CatalogD
Key: IMPALA-12286
URL: https://issues.apache.org/jira/browse/IMPALA-12286
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 4.3.0
Reporter: Wenzhe Zhou
Assignee: Wenzhe Zhou
statestore is responsible for electing a leader catalogd when CatalogD is
enabled for an Impala cluster with a pair of catalogd in active-passive mode.
When a new leader catalogd is elected, statestore notify all coordinators and
catalogds for the new leader catalogd in thrift RPCs. But RPCs could be failed
due to network condition. We have to resend RPCs to the coordinators and
catalogds if they are still in the cluster. Otherwise, catalogds don't know
their new roles, and the coordinators still access old leader catalogd.
We also need to rename metric name ""catalog-server.ha-active-status" to
"catalog-server.active-status".
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