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https://issues.apache.org/jira/browse/HDFS-8000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14385843#comment-14385843
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Brahma Reddy Battula commented on HDFS-8000:
--------------------------------------------
Thanks for taking look into this issue...
{quote}
It appears that you have debug logging enabled for block state changes. Is that
right?
{quote}
Yes, As DN is not getting registering with NN, I had started NN in debug
mode...Since I configured 48 datadir's and have 90000000+ Blocks,,DN is taking
more time for block scanning and cluster is non-functional..
{quote}
Perhaps the logging could be moved outside of the lock, similar to what we've
done in other recent patches.
{quote}
Yes,.Moving out always Good..
Here one more question is NN is taking 50 mins to load 7 GB fsimage..Which I
need to look more...
> 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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