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Posted to issues@flink.apache.org by "Chesnay Schepler (Jira)" <ji...@apache.org> on 2022/09/22 14:39:00 UTC

[jira] [Commented] (FLINK-29397) Race condition in StreamTask can lead to NPE if changelog is disabled

    [ https://issues.apache.org/jira/browse/FLINK-29397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17608298#comment-17608298 ] 

Chesnay Schepler commented on FLINK-29397:
------------------------------------------

This is trivially reproducible by disabling the changelog int he StreamTaskTest.

> Race condition in StreamTask can lead to NPE if changelog is disabled
> ---------------------------------------------------------------------
>
>                 Key: FLINK-29397
>                 URL: https://issues.apache.org/jira/browse/FLINK-29397
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Task
>    Affects Versions: 1.16.0
>            Reporter: Chesnay Schepler
>            Assignee: Chesnay Schepler
>            Priority: Blocker
>             Fix For: 1.16.0
>
>
> {{StreamTask#processInput}} contains a branch where the changelogWriterAvailabilityProvider is accessed without a null check; this field however is nullable in case the changelog is disabled.



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