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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/04/05 20:20:00 UTC
[jira] [Updated] (HDDS-1398) Concurrency issue in
SCMConnectionManager#getValues
[ https://issues.apache.org/jira/browse/HDDS-1398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDDS-1398:
---------------------------------
Labels: pull-request-available (was: )
> Concurrency issue in SCMConnectionManager#getValues
> ---------------------------------------------------
>
> Key: HDDS-1398
> URL: https://issues.apache.org/jira/browse/HDDS-1398
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Doroszlai, Attila
> Assignee: Doroszlai, Attila
> Priority: Major
> Labels: pull-request-available
>
> {{testStartStopDatanodeStateMachine}} is flaky, causing [occasional pre-commit build failures|https://builds.apache.org/job/hadoop-multibranch/job/PR-691/1/artifact/out/patch-unit-hadoop-hdds_container-service.txt]. HDDS-1332 added some logging to find out more about the cause.
> I think the problem is not test-specific, and is caused by the following: {{SCMConnectionManager#scmMachines}} is a plain {{HashMap}}, guarded by a {{ReadWriteLock}} in most places where it's used, except {{getValues()}}. The method also returns the values collection without any write protection (though currently none of the callers modify it).
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