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Posted to issues@beam.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/04/30 19:05:00 UTC
[jira] [Work logged] (BEAM-7192) Elements buffered during
checkpointing may not be partitioned correctly
[ https://issues.apache.org/jira/browse/BEAM-7192?focusedWorklogId=235479&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-235479 ]
ASF GitHub Bot logged work on BEAM-7192:
----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Apr/19 19:04
Start Date: 30/Apr/19 19:04
Worklog Time Spent: 10m
Work Description: mxm commented on pull request #8441: [BEAM-7192] Fix partitioning of buffered elements during checkpointing
URL: https://github.com/apache/beam/pull/8441
When a Flink checkpoint is taken, the current bundle is finalized. The
finalization happens when the checkpoint barrier has already been sent
downstream; emitting elements at this point would violate the checkpoint barrier
alignment.
When elements are emitted during checkpointing they are buffered until the
checkpoint is complete. We should ensure that they are keyed correctly and
emission of the buffered elements does not interfere with any concurrent state
requests (in case of portability).
Post-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
Lang | SDK | Apex | Dataflow | Flink | Gearpump | Samza | Spark
--- | --- | --- | --- | --- | --- | --- | ---
Go | [](https://builds.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/) | --- | --- | --- | --- | --- | ---
Java | [](https://builds.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Streaming/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python_Verify/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python3_Verify/lastCompletedBuild/) | --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/) <br> [](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Python_PVR_Flink_Cron/lastCompletedBuild/) | --- | --- | ---
Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
--- |Java | Python | Go | Website
--- | --- | --- | --- | ---
Non-portable | [](https://builds.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Python_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Go_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Website_Cron/lastCompletedBuild/)
Portable | --- | [](https://builds.apache.org/job/beam_PreCommit_Portable_Python_Cron/lastCompletedBuild/) | --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 235479)
Time Spent: 10m
Remaining Estimate: 0h
> Elements buffered during checkpointing may not be partitioned correctly
> -----------------------------------------------------------------------
>
> Key: BEAM-7192
> URL: https://issues.apache.org/jira/browse/BEAM-7192
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Priority: Major
> Fix For: 2.13.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When a Flink checkpoint is taken, the current bundle is finalized. The finalization happens when the checkpoint barrier has already been sent downstream; emitting elements at this point would violate the checkpoint barrier alignment.
> When elements are emitted during checkpointing they are buffered until the checkpoint is complete. We should ensure that they are keyed correctly and emission of the buffered elements does not interfere with any concurrent state requests (in case of portability).
>
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