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https://issues.apache.org/jira/browse/BEAM-9789?focusedWorklogId=425456&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-425456
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ASF GitHub Bot logged work on BEAM-9789:
----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Apr/20 20:24
Start Date: 20/Apr/20 20:24
Worklog Time Spent: 10m
Work Description: lostluck opened a new pull request #11468:
URL: https://github.com/apache/beam/pull/11468
Fix locking error introduced to the harness when resolving
https://issues.apache.org/jira/browse/BEAM-9618
The root is: Always check the error *before* locking. And if defer
mu.Unlock() isn't used (or as in this case, able to be used), always unlock
before returning the error.
Deadlocks can prevent the error case you're returning from being transmitted.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 425456)
Remaining Estimate: 0h
Time Spent: 10m
> Locking error in harness.go
> ---------------------------
>
> Key: BEAM-9789
> URL: https://issues.apache.org/jira/browse/BEAM-9789
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Reporter: Robert Burke
> Assignee: Robert Burke
> Priority: Major
> Fix For: Not applicable
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When there's an error on lookup or construction of an execution plan, the
> lock is accidentally held causing the worker to freeze.
> Shouldn't be user affecting, as most plans and lookups are correct without
> error, but if there's a transient GRPC issue on lookup, that might cause an
> otherwise healthy worker to deadlock.
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