Zhihua Deng created HIVE-27692:
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Summary: Explore removing the always task from embedded HMS
Key: HIVE-27692
URL: https://issues.apache.org/jira/browse/HIVE-27692
Project: Hive
Issue Type: Improvement
Components: Standalone Metastore
Reporter: Zhihua Deng
Assignee: Zhihua Deng
The always tasks are running in the leader HMS now, the properties for
configuring the leader should only belong to HMS, other engines such as
Spark/Impala don't need to know these properties. For most cases, the engine
only cares about the hive.metastore.uris.
Every time when a new apps uses an embedded Metastore, it will start the HMS
always tasks by default. Imaging we have hundreds of apps, then hundreds of
pieces of tasks are running, this will put extra burden to the underlying
databases, such as the flooding queries, connection limit.
I think we can remove always tasks from the embeded Metastore, the always task
will be taken care of by the standalone Metastore and a standalone Metastore
should be here in production environment.
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