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https://issues.apache.org/jira/browse/HADOOP-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656685#action_12656685
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Konstantin Shvachko commented on HADOOP-4866:
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I meant that there should be the same exception on the other side. If you go to
your data-node 172.16.1.162 and check it in the logs there.
> NameNode error in commitBlockSynchronization
> --------------------------------------------
>
> Key: HADOOP-4866
> URL: https://issues.apache.org/jira/browse/HADOOP-4866
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Brian Bockelman
>
> The NameNode continuously has an error in the commitBlockSynchronization.
> This happens for ~5 blocks at a rate of 5-10Hz. I have no idea when this
> started happening because this has been going on for days, well past the
> start of our current logs.
> This appears to be a new symptom in 0.19.0, but I have no idea what could be
> causing it.
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