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Date: Mon, 21 Mar 2016 18:37:25 +0000 (UTC)
From: "Tsz Wo Nicholas Sze (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12947894.1457408015000.7907.1458585445631@Atlassian.JIRA>
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Subject: [jira] [Commented] (HDFS-9917) IBR accumulate more objects when SNN
 was down for sometime.
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    [ https://issues.apache.org/jira/browse/HDFS-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15204843#comment-15204843 ] 

Tsz Wo Nicholas Sze commented on HDFS-9917:
-------------------------------------------

[~brahmareddy], your proposal on reRegister() sounds great, thanks.

> 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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