Andrew Kyle Purtell created HBASE-25505:
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Summary: ZK watcher threads are daemonized; reconsider
Key: HBASE-25505
URL: https://issues.apache.org/jira/browse/HBASE-25505
Project: HBase
Issue Type: Brainstorming
Reporter: Andrew Kyle Purtell
On HBASE-25279 there was some discussion and difference of opinion about having
ZK watcher pool threads be daemonized. This is not necessarily a problem but
should be reconsidered.
Daemon threads are subject to abrupt termination during JVM shutdown and
therefore may be interrupted before state changes are complete or resources are
released.
As long as ZK watchers are properly closed by shutdown logic the pool threads
will be terminated in a controlled manner and the JVM will exit.
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