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From "Reinier Kip (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-2831) Possible bug in Beam+Flink memory management, disk spillover
Date Thu, 31 Aug 2017 19:49:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-2831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149496#comment-16149496
] 

Reinier Kip commented on BEAM-2831:
-----------------------------------

[~aljoscha] Yes! The pipeline consistently succeeds with this change. Thanks for your effort.
I suspect we will intregrate this replacement coder while we wait for the fix to come out.
Do you foresee any consequences due to the considerations you wrote near the bottom?

> Possible bug in Beam+Flink memory management, disk spillover
> ------------------------------------------------------------
>
>                 Key: BEAM-2831
>                 URL: https://issues.apache.org/jira/browse/BEAM-2831
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>    Affects Versions: 2.0.0, 2.1.0
>         Environment: Flink 1.2.1 and 1.3.0, Java HotSpot and OpenJDK 8, macOS 10.12.6
and unknown Linux
>            Reporter: Reinier Kip
>            Assignee: Aljoscha Krettek
>
> I’ve been running a Beam pipeline on Flink. Depending on the dataset size and the heap
memory configuration of the jobmanager and taskmanager, I may run into an EOFException, which
causes the job to fail.
> As [discussed on Flink's mailinglist|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/EOFException-related-to-memory-segments-during-run-of-Beam-pipeline-on-Flink-td15255.html]
(stacktrace enclosed), Flink catches these EOFExceptions and activates disk spillover. Because
Beam wraps these exceptions, this mechanism fails, the exception travels up the stack, and
the job aborts.
> Hopefully this is enough information and this is something that can be adjusted for in
Beam. I'd be glad to provide more information where needed.



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