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https://issues.apache.org/jira/browse/HDFS-8000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391120#comment-14391120
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Colin Patrick McCabe commented on HDFS-8000:
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Have you tried benchmarking load time with debug logging off, and the initial
java heap size set to a larger value? That might help.
> Potential deadlock #HeartbeatManager
> ------------------------------------
>
> Key: HDFS-8000
> URL: https://issues.apache.org/jira/browse/HDFS-8000
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Attachments: NNtd.out
>
>
> Cluster loaded with 90000000+ Blocks
> Restart DN
> access NN UI..Then NN will got Hang
> Will attach td..
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