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https://issues.apache.org/jira/browse/TEZ-1714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bikas Saha resolved TEZ-1714.
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Resolution: Fixed
Fixed elsewhere
> Locking issue with StateChangeNotifier
> --------------------------------------
>
> Key: TEZ-1714
> URL: https://issues.apache.org/jira/browse/TEZ-1714
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Bikas Saha
> Priority: Critical
>
> The StateChangeNotifier takes a read lock and notifies listeners using a
> direct method call. This notification could lead to the listener being
> complete. At this point, it may decide to unregister from further status
> updates and this should be allowed. However unregister tries to take a write
> lock on the StateChangeNotifier and the result is a deadlock.
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