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https://issues.apache.org/jira/browse/BEAM-8554?focusedWorklogId=340774&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-340774
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ASF GitHub Bot logged work on BEAM-8554:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 08/Nov/19 22:16
            Start Date: 08/Nov/19 22:16
    Worklog Time Spent: 10m 
      Work Description: stevekoonce commented on issue #10013: [BEAM-8554] Use 
WorkItemCommitRequest protobuf fields to signal that …
URL: https://github.com/apache/beam/pull/10013#issuecomment-552010960
 
 
   Squashed the commits.  Passing to a committer for review
   
   R: @reuvenlax
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 340774)
    Time Spent: 2.5h  (was: 2h 20m)

> Use WorkItemCommitRequest protobuf fields to signal that a WorkItem needs to 
> be broken up
> -----------------------------------------------------------------------------------------
>
>                 Key: BEAM-8554
>                 URL: https://issues.apache.org/jira/browse/BEAM-8554
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-dataflow
>            Reporter: Steve Koonce
>            Priority: Minor
>          Time Spent: 2.5h
>  Remaining Estimate: 0h
>
> +Background:+
> When a WorkItemCommitRequest is generated that's bigger than the permitted 
> size (> ~180 MB), a KeyCommitTooLargeException is logged (_not thrown_) and 
> the request is still sent to the service.  The service rejects the commit, 
> but breaks up input messages that were bundled together and adds them to new, 
> smaller work items that will later be pulled and re-tried - likely without 
> generating another commit that is too large.
> When a WorkItemCommitRequest is generated that's too large to be sent back to 
> the service (> 2 GB), a KeyCommitTooLargeException is thrown and nothing is 
> sent back to the service.
>  
> +Proposed Improvement+
> In both cases, prevent the doomed, large commit item from being sent back to 
> the service.  Instead send flags in the commit request signaling that the 
> current work item led to a commit that is too large and the work item should 
> be broken up.  



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