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https://issues.apache.org/jira/browse/BEAM-14244?focusedWorklogId=752853&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-752853
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ASF GitHub Bot logged work on BEAM-14244:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Apr/22 12:46
Start Date: 05/Apr/22 12:46
Worklog Time Spent: 10m
Work Description: steveniemitz commented on code in PR #17262:
URL: https://github.com/apache/beam/pull/17262#discussion_r842741457
##########
runners/flink/src/test/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperatorTest.java:
##########
@@ -305,7 +305,10 @@ public void processElement(
eventTimerWithOutputTimestamp
.withOutputTimestamp(timerOutputTimestamp)
.set(timerTimestamp);
-
processingTimer.offset(Duration.millis(timerTimestamp.getMillis())).setRelative();
+ processingTimer
Review Comment:
> this seems inconsistent with how event-time timers work, which set output
timestamp based on the fire timestamp (by default). Do we have a reason for
such a difference?
My guess would be that "firing timestamp" is in a different time domain
here, so element input timestamp is the only thing that can be used that's in
the event time domain to set the hold on.
> And what about looping processing-time timers, where there is actually no
element?
The output timestamp of the timer (the timer executing the OnTimer callback)
is
[used](https://github.com/apache/beam/blob/master/runners/core-java/src/main/java/org/apache/beam/runners/core/SimpleDoFnRunner.java#L674).
I actually do agree that the default being the output watermark if the
output timestamp on the timer is unset makes more sense. This would also
remove the need for a watermark hold at all, and remove a source of confusion
around processing time timers. It seems like it'd be a larger change though.
Issue Time Tracking
-------------------
Worklog Id: (was: 752853)
Time Spent: 1h 10m (was: 1h)
> Processing time timers should use outputTimestamp rather than input watermark
> for their timestamp
> -------------------------------------------------------------------------------------------------
>
> Key: BEAM-14244
> URL: https://issues.apache.org/jira/browse/BEAM-14244
> Project: Beam
> Issue Type: Bug
> Components: runner-core, sdk-java-core
> Reporter: Steve Niemitz
> Assignee: Steve Niemitz
> Priority: P1
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> Currently processing time timers ignore the outputTimestamp and instead use
> the input watermark at the time they fire. This is wrong because the input
> watermark can have advanced arbitrarily far past the actual output timestamp
> when it fires.
> The correct behavior should be to instead use the outputTimestamp the timer
> was configured to fire with.
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