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https://issues.apache.org/jira/browse/SAMZA-744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14654965#comment-14654965
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Yan Fang commented on SAMZA-744:
--------------------------------
added some comments in the RB. Thank you. :)
> Samza shutdown sequence throws exception
> ----------------------------------------
>
> Key: SAMZA-744
> URL: https://issues.apache.org/jira/browse/SAMZA-744
> Project: Samza
> Issue Type: Bug
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Yi Pan (Data Infrastructure)
> Assignee: Yi Pan (Data Infrastructure)
> Fix For: 0.10.0
>
> Attachments: SAMZA-744-0.patch
>
>
> The current shutdown sequence has a problematic sequence for changelog
> attached stores:
> {code}
> } finally {
> info("Shutting down.")
> shutdownConsumers
> shutdownTask
> shutdownProducers
> shutdownStores
> shutdownLocalityManager
> shutdownOffsetManager
> shutdownMetrics
> info("Shutdown complete.")
> }
> {code}
> If the KV-stores has pending writes in cache and a changelog attached,
> shutdownStores will try to flush the store, which results in invoking
> producer.send(). However, the producers are already shutdown according to the
> above sequence. We need to move the shutdownProducers later than any shutdown
> procedure that would possibly flushing out pending writes to the system
> streams.
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