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https://issues.apache.org/jira/browse/BEAM-10329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17165848#comment-17165848
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Beam JIRA Bot commented on BEAM-10329:
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This issue is assigned but has not received an update in 30 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Dataflow runner does not reserve timestamp of Create.Timestamped() in batch
> stateful dofn
> -----------------------------------------------------------------------------------------
>
> Key: BEAM-10329
> URL: https://issues.apache.org/jira/browse/BEAM-10329
> Project: Beam
> Issue Type: Bug
> Components: runner-dataflow
> Reporter: Yichi Zhang
> Assignee: Yichi Zhang
> Priority: P2
> Labels: stale-assigned
> Time Spent: 1h
> Remaining Estimate: 0h
>
> When run a test pipeline such as
> {code:java}
> public void testTimestampedValue() throws Exception {
> final String timerId = "foo";
> DoFn<KV<String, Long>, KV<Long, Instant>> statefn =
> new DoFn<KV<String, Long>, KV<Long, Instant>>() {
> @TimerId(timerId)
> private final TimerSpec spec =
> TimerSpecs.timer(TimeDomain.EVENT_TIME);
> @ProcessElement
> public void processElement(
> @TimerId(timerId) Timer timer,
> @Timestamp Instant timestamp,
> OutputReceiver<KV<Long, Instant>> r) {
> r.output(KV.of(3L, timestamp));
> }
> @OnTimer(timerId)
> public void onTimer(@Timestamp Instant timestamp,
> OutputReceiver<KV<Long, Instant>> r) {
> // do nothing. Since whether timer is involved doesn’t make
> difference
> }
> };
> PCollection<KV<Long, Instant>> output =
> pipeline
> .apply(Create.timestamped(TimestampedValue.of(KV.of("hello",
> 37L), new Instant(123L))))
> .apply(ParDo.of(statefn));
> PAssert.that(output).containsInAnyOrder(KV.of(3L, new Instant(123L)));
> pipeline.run();
> }
> {code}
> On dataflow with fnapi, the timestamp of output in PAssert won't match.
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