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Posted to jira@kafka.apache.org by "Guozhang Wang (JIRA)" <ji...@apache.org> on 2018/12/07 00:57:00 UTC

[jira] [Resolved] (KAFKA-7709) ConcurrentModificationException occurs when iterating through multiple partitions in Sender.getExpiredInflightBatches

     [ https://issues.apache.org/jira/browse/KAFKA-7709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guozhang Wang resolved KAFKA-7709.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.1.1
                   2.2.0

Thanks [~markcho] for your contribution!

> ConcurrentModificationException occurs when iterating through multiple partitions in Sender.getExpiredInflightBatches
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-7709
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7709
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 2.1.0
>            Reporter: Mark Cho
>            Priority: Major
>             Fix For: 2.2.0, 2.1.1
>
>
> In Sender.getExpiredInflightBatches method, delivery.timeout on multiple partitions causes ConcurrentModificationException due to the underlying Java collection being mutated while being iterated on.
> In Java HashMap, you cannot mutate the underlying map while iterating through it, as this will cause ConcurrentModificationException.



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