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https://issues.apache.org/jira/browse/HDFS-7886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354411#comment-14354411
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Konstantin Shvachko commented on HDFS-7886:
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Yi, when DN restarts it sends a block report. Right after registering. If you
call {{triggerBlockReports()}}, it will send the block report again, but this
is not necessary, because block report already happened. Or I didn't understand
why second block report is needed.
Plamen, I agree we should investigate the race in HDFS-7906.
For this jira can we fix the test. We need something different from
{{waitActive()}} to ensure that DNs have indeed restarted.
> TestFileTruncate#testTruncateWithDataNodesRestart runs timeout sometimes
> ------------------------------------------------------------------------
>
> Key: HDFS-7886
> URL: https://issues.apache.org/jira/browse/HDFS-7886
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 2.7.0
> Reporter: Yi Liu
> Assignee: Plamen Jeliazkov
> Priority: Minor
> Attachments: HDFS-7886.patch
>
>
> https://builds.apache.org/job/PreCommit-HDFS-Build/9730//testReport/
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