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https://issues.apache.org/jira/browse/FLINK-20654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17253921#comment-17253921
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Matthias commented on FLINK-20654:
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[This
build|https://dev.azure.com/mapohl/flink/_build/results?buildId=140&view=logs&j=0a15d512-44ac-5ba5-97ab-13a5d066c22c&t=634cd701-c189-5dff-24cb-606ed884db87&l=3882]
failed due to a {{EOFException}}.
> Unaligned checkpoint recovery may lead to corrupted data stream
> ---------------------------------------------------------------
>
> Key: FLINK-20654
> URL: https://issues.apache.org/jira/browse/FLINK-20654
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.12.0
> Reporter: Arvid Heise
> Assignee: Roman Khachatryan
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.13.0, 1.12.1
>
>
> Fix of FLINK-20433 shows potential corruption after recovery for all
> variations of UnalignedCheckpointITCase.
> To reproduce, run UCITCase a couple hundreds times. The issue showed for me
> in:
> - execute [Parallel union, p = 5]
> - execute [Parallel union, p = 10]
> - execute [Parallel cogroup, p = 5]
> - execute [parallel pipeline with remote channels, p = 5]
> with decreasing frequency.
> The issue manifests as one of the following issues:
> - stream corrupted exception
> - EOF exception
> - assertion failure in NUM_LOST or NUM_OUT_OF_ORDER
> - (for union) ArithmeticException overflow (because the number that should be
> [0;100000] has been mis-deserialized)
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