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Bharath Vissapragada commented on HBASE-25505: ---------------------------------------------- Agree with the opinion. Marking them as daemon just for convenience masks the root problem of an orderly shutdown. I'd prefer to fix the root cause instead. > 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 > Priority: Major > > 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. -- This message was sent by Atlassian Jira (v8.3.4#803005)