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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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