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https://issues.apache.org/jira/browse/BEAM-7442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16853077#comment-16853077
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Maximilian Michels commented on BEAM-7442:
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I didn't know you wanted to work on this. Let me know if the fix works for you
or if you have any difficulties. You should be able to assign yourself to other
issues now.
> Bounded Reads for Flink Runner fails with OOM
> ---------------------------------------------
>
> Key: BEAM-7442
> URL: https://issues.apache.org/jira/browse/BEAM-7442
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Akshay Iyangar
> Assignee: Akshay Iyangar
> Priority: Major
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> When Flink runner is reading from a bounded source and if the total number of
> files are huge and the count is more. FlinkRunner throws an OOM error. This
> is happening because the current implementation doesn't read them
> sequentially but simultaneously thus causing all of the files to be in memory
> which quickly breaks the cluster.
> Solution : To wrap `UnboundedReadFromBoundedSource` class by a wrapper to see
> that when the stream is a bounded source we make it read it sequentially
> using a queue.
>
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