[jira] [Updated] (KAFKA-4510) StreamThread must finish rebalance in state PENDING_SHUTDOWN

["Matthias J. Sax (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-4510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias J. Sax updated KAFKA-4510:
-----------------------------------
    Status: Patch Available  (was: In Progress)

> StreamThread must finish rebalance in state PENDING_SHUTDOWN
> ------------------------------------------------------------
>
>                 Key: KAFKA-4510
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4510
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Matthias J. Sax
>            Assignee: Matthias J. Sax
>
> If a Streams application runs with multiple threads within one JVM and the application gets stopped. this can triggers a rebalance when the first threads finishes processing because not all thread shut down at the same time.
> Because we try to reuse tasks, on rebalance task are not closed immediately in order for a potential reuse (if a task gets assigned the its original thread). However, if a thread is in state {{PENDING_SHUTDOWN}} it does finish the rebalance operation completely and thus does not release the suspended task and the application exits with not all locks released.



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