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https://issues.apache.org/jira/browse/HADOOP-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12657283#action_12657283
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Brian Bockelman commented on HADOOP-4866:
-----------------------------------------
Even with the second patch, the extremely high rate of the log messages in the
NN still appear.
> NameNode error in commitBlockSynchronization
> --------------------------------------------
>
> Key: HADOOP-4866
> URL: https://issues.apache.org/jira/browse/HADOOP-4866
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.19.0
> Reporter: Brian Bockelman
> Attachments: 4866_20081215.patch, 4866_20081216.patch
>
>
> 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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