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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/10/01 19:23:00 UTC
[jira] [Work logged] (BEAM-12979) [Go SDK] Avoid shallow copying
CacheToken protobufs in statecache.go
[ https://issues.apache.org/jira/browse/BEAM-12979?focusedWorklogId=659121&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-659121 ]
ASF GitHub Bot logged work on BEAM-12979:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Oct/21 19:22
Start Date: 01/Oct/21 19:22
Worklog Time Spent: 10m
Work Description: jrmccluskey opened a new pull request #15639:
URL: https://github.com/apache/beam/pull/15639
…ken reading bug, single-elm cache
Change the side input caching implementation to handle ReStreams instead of ReusableInputs to help avoid concurrency issues, also cleans up issues with shallow copying CacheToken protobufs and makes sure an appropriate key is set for the single-element cache in pardo.
------------------------
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`ValidatesRunner` compliance status (on master branch)
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Examples testing status on various runners
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Post-Commit SDK/Transform Integration Tests Status (on master branch)
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Issue Time Tracking
-------------------
Worklog Id: (was: 659121)
Remaining Estimate: 0h
Time Spent: 10m
> [Go SDK] Avoid shallow copying CacheToken protobufs in statecache.go
> --------------------------------------------------------------------
>
> Key: BEAM-12979
> URL: https://issues.apache.org/jira/browse/BEAM-12979
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Reporter: Daniel Oliveira
> Assignee: Jack McCluskey
> Priority: P2
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Copying protobuf messages should be avoided because it causes a ton of subtle bugs, especially when mutexes inside the object get copied. We should be using pointers instead.
> Some spots where copies of CacheTokens are made instead of pointers:
> [https://github.com/apache/beam/blob/f051cd91d46e5dab0ca48f108b27d9d87e6e5e8f/sdks/go/pkg/beam/core/runtime/harness/statecache/statecache.go#L92]
> [https://github.com/apache/beam/blob/f051cd91d46e5dab0ca48f108b27d9d87e6e5e8f/sdks/go/pkg/beam/core/runtime/harness/statecache/statecache.go#L124]
> [https://github.com/apache/beam/blob/f051cd91d46e5dab0ca48f108b27d9d87e6e5e8f/sdks/go/pkg/beam/core/runtime/harness/statecache/statecache_test.go#L119]
> This isn't an exhaustive list, but it covers some of the major instances. Should be easy enough to ctrl+f "fnpb.ProcessBundleRequest_CacheToken" and just make sure it's used as a pointer wherever possible.
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