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Posted to issues@flink.apache.org by "Yun Tang (JIRA)" <ji...@apache.org> on 2019/07/03 07:32:00 UTC

[jira] [Commented] (FLINK-13072) RocksDBStateBachend is not thread safe and data loss silently

    [ https://issues.apache.org/jira/browse/FLINK-13072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877586#comment-16877586 ] 

Yun Tang commented on FLINK-13072:
----------------------------------

[~zicat] After a quick look, I believe this is not a RocksDBStateBackend bug but the {{input.iterator()}} not thread safe. You could print the details when you get {{mapState}} in your {{valueCount}} method each time, and you could find the two {{mapState}} are not updated consistently.

> RocksDBStateBachend is not thread safe and data loss silently
> -------------------------------------------------------------
>
>                 Key: FLINK-13072
>                 URL: https://issues.apache.org/jira/browse/FLINK-13072
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / State Backends
>    Affects Versions: 1.8.0, 1.8.1
>            Reporter: lynn1.zhang
>            Priority: Blocker
>         Attachments: flink-demo.zip
>
>
> I create 2 mapstates in one operator, then create 2 threads in apply method, each thread operate each map state(the operator is same), the expect result is that 2 state have the same result but not. I upload the code, please help to try it.



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