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https://issues.apache.org/jira/browse/PHOENIX-7223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Istvan Toth resolved PHOENIX-7223.
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Fix Version/s: 5.2.0
5.1.4
Resolution: Fixed
Committed to master and 5.1.
Thanks for the review [~vjasani].
> Make Sure Tools Always Close HBase Connections on Exit
> ------------------------------------------------------
>
> Key: PHOENIX-7223
> URL: https://issues.apache.org/jira/browse/PHOENIX-7223
> Project: Phoenix
> Issue Type: Bug
> Components: core
> Affects Versions: 5.2.0, 5.1.4
> Reporter: Istvan Toth
> Assignee: Istvan Toth
> Priority: Minor
> Fix For: 5.2.0, 5.1.4
>
>
> When using the Netty connection implementation in ZooKeeper the JVM hangs on
> exit if the ZK Connection is not shut down explicitly.
> While this should be fixed in some future ZK version, -we can fix it short
> term- by doing the right thing, and not leaving Connections open when exiting.
> While this is fine as a general cleanup, it doesn't solve the ZK hang issue,
> as the HBase Connections are kept open in the cached CQSI objects.
> Update 2:
> The actual problem is that we throw an exception from the Tool's main thread,
> which causes an ungraceful shutdown.
> If we catch the error, and return a non-zero exit code, then the JVM will
> shut down normall, and the shutdown hook will close the CQSI objects.
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