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Posted to commits@samza.apache.org by "Jagadish (JIRA)" <ji...@apache.org> on 2018/05/15 19:49:01 UTC

[jira] [Closed] (SAMZA-1643) StreamPartitionCountMonitor should only restart/shut down the job if partition count increases

     [ https://issues.apache.org/jira/browse/SAMZA-1643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jagadish closed SAMZA-1643.
---------------------------

> StreamPartitionCountMonitor should only restart/shut down the job if partition count increases
> ----------------------------------------------------------------------------------------------
>
>                 Key: SAMZA-1643
>                 URL: https://issues.apache.org/jira/browse/SAMZA-1643
>             Project: Samza
>          Issue Type: Bug
>            Reporter: Prateek Maheshwari
>            Assignee: Prateek Maheshwari
>            Priority: Major
>
> Make StreamPartitionCountMonitor less aggressive and only restart (stateless) or shut down (stateful) the job if partition count increases.
> In some versions of KafkaConsumer, partitionFor(topic) can return a count lower than the configured number of partitions if the broker it asks has recently restarted.
> The only downside of not restarting the job on partition count decreases is that some containers may be idle.



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