[ https://issues.apache.org/jira/browse/BEAM-8543?focusedWorklogId=441499&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-441499 ]
ASF GitHub Bot logged work on BEAM-8543: ---------------------------------------- Author: ASF GitHub Bot Created on: 04/Jun/20 19:59 Start Date: 04/Jun/20 19:59 Worklog Time Spent: 10m Work Description: rehmanmuradali opened a new pull request #11924: URL: https://github.com/apache/beam/pull/11924 ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [ ] [**Choose reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and mention them in a comment (`R: @username`). - [ ] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`, where you replace `BEAM-XXX` with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue. - [ ] Update `CHANGES.md` with noteworthy changes. - [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). 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For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 441499) Remaining Estimate: 0h Time Spent: 10m > Dataflow streaming timers are not strictly time ordered when set earlier > mid-bundle > ----------------------------------------------------------------------------------- > > Key: BEAM-8543 > URL: https://issues.apache.org/jira/browse/BEAM-8543 > Project: Beam > Issue Type: Bug > Components: runner-dataflow > Affects Versions: 2.13.0 > Reporter: Jan Lukavský > Assignee: Rehman Murad Ali > Priority: P2 > Time Spent: 10m > Remaining Estimate: 0h > > Let's suppose we have the following situation: > - statful ParDo with two timers - timerA and timerB > - timerA is set for window.maxTimestamp() + 1 > - timerB is set anywhere between <windowStart, windowEnd), let's denote that > timerB.timestamp > - input watermark moves to BoundedWindow.TIMESTAMP_MAX_VALUE > Then the order of timers is as follows (correct): > - timerB > - timerA > But, if timerB sets another timer (say for timerB.timestamp + 1), then the > order of timers will be: > - timerB (timerB.timestamp) > - timerA (BoundedWindow.TIMESTAMP_MAX_VALUE) > - timerB (timerB.timestamp + 1) > Which is not ordered by timestamp. The reason for this is that when the input > watermark update is evaluated, the WatermarkManager,extractFiredTimers() will > produce both timerA and timerB. That would be correct, but when timerB sets > another timer, that breaks this. -- This message was sent by Atlassian Jira (v8.3.4#803005)