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https://issues.apache.org/jira/browse/BEAM-4141?focusedWorklogId=92672&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-92672
]
ASF GitHub Bot logged work on BEAM-4141:
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Author: ASF GitHub Bot
Created on: 19/Apr/18 16:37
Start Date: 19/Apr/18 16:37
Worklog Time Spent: 10m
Work Description: wcn3 opened a new pull request #5184: BEAM-4141: Drain
source when user function processing fails.
URL: https://github.com/apache/beam/pull/5184
When the user function fails, the data is continued to be buffered up by
the data plane. Since nothing is consuming it, the data plane will
eventually block and no other data channels can be serviced, causing the
entire worker to essentially be deadlocked.
Also added a minor cleanup to refer to the self data channel as c instead of
m.
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Issue Time Tracking
-------------------
Worklog Id: (was: 92672)
Time Spent: 10m
Remaining Estimate: 0h
> Data channel deadlocks when user function fails
> -----------------------------------------------
>
> Key: BEAM-4141
> URL: https://issues.apache.org/jira/browse/BEAM-4141
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Affects Versions: Not applicable
> Reporter: Bill Neubauer
> Assignee: Bill Neubauer
> Priority: Major
> Fix For: Not applicable
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> There is a deadlock condition in the data channel code that occurs when a
> user function fails while processing an element. The producer for the data
> channel is continuing to send information across a channel, but the intended
> consumer has stopped listening. Unfortunately, this channel blocks the entire
> data channel, blocking data for any other DoFn that might be running, causing
> the whole worker to deadlock.
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