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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9917) IBR accumulate more objects when SNN was down for sometime.
Date Fri, 01 Apr 2016 02:39:25 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinayakumar B updated HDFS-9917:
--------------------------------
    Affects Version/s: 2.7.2

> IBR accumulate more objects when SNN was down for sometime.
> -----------------------------------------------------------
>
>                 Key: HDFS-9917
>                 URL: https://issues.apache.org/jira/browse/HDFS-9917
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.2
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>            Priority: Critical
>         Attachments: HDFS-9917.patch
>
>
> SNN was down for sometime because of some reasons..After restarting SNN,it became unreponsive
because 
> - 29 DN's sending IBR in each 5 million ( most of them are delete IBRs), where as each
datanode had only ~2.5 million blocks.
> - GC can't trigger on this objects since all will be under RPC queue. 
> To recover this( to clear this objects) ,restarted all the DN's one by one..This issue
happened in 2.4.1 where split of blockreport was not available.



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