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https://issues.apache.org/jira/browse/BEAM-2140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065663#comment-16065663
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Kenneth Knowles commented on BEAM-2140:
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Yes, your last comment is the reason. If the watermark of the Create doesn't
advance past _n_, then as far as ParDo(read forever) knows, it could receive a
topic timestamped _n_ that will result in pulling elements from pubsub
timestamped _n_. So you have a stuck pipeline. This highlights the issue we've
discussed that a per-PCollection watermark is not really ideal for SDF, but I
think that scope is too big for this ticket.
> Fix SplittableDoFn ValidatesRunner tests in FlinkRunner
> -------------------------------------------------------
>
> Key: BEAM-2140
> URL: https://issues.apache.org/jira/browse/BEAM-2140
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> As discovered as part of BEAM-1763, there is a failing SDF test. We disabled
> the tests to unblock the open PR for BEAM-1763.
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