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Date: Tue, 8 Mar 2016 03:33:40 +0000 (UTC)
From: "Brahma Reddy Battula (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
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Subject: [jira] [Created] (HDFS-9917) IBR accumulate more objects when SNN
 was down for sometime.
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Brahma Reddy Battula created HDFS-9917:
------------------------------------------

             Summary: 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
            Reporter: Brahma Reddy Battula
            Assignee: Brahma Reddy Battula


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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