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https://issues.apache.org/jira/browse/HDFS-15737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18043418#comment-18043418
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ASF GitHub Bot commented on HDFS-15737:
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github-actions[bot] closed pull request #2562: HDFS-15737. Don't remove
datanodes from outOfServiceNodeBlocks while checking in DatanodeAdminManager
URL: https://github.com/apache/hadoop/pull/2562
> Don't remove datanodes from outOfServiceNodeBlocks while checking in
> DatanodeAdminManager
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-15737
> URL: https://issues.apache.org/jira/browse/HDFS-15737
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Ye Ni
> Assignee: Ye Ni
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> With CyclicIteration, remove an item while iterating causes either dead loop
> or ConcurrentModificationException.
> This item should be removed by
> {{toRemove.add(dn);}}
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