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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8000) Potential deadlock #HeartbeatManager
Date Sun, 29 Mar 2015 16:36:53 GMT

    [ 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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