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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9917) IBR accumulate more objects when SNN was down for sometime.
Date Tue, 05 Apr 2016 02:15:26 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15225529#comment-15225529
] 

Hudson commented on HDFS-9917:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9555 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9555/])
HDFS-9917. IBR accumulate more objects when SNN was down for sometime. (vinayakumarb: rev
818d6b799eead13a17a0214172df60a269b046fb)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBPOfferService.java


> 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
>             Fix For: 2.7.3
>
>         Attachments: HDFS-9917-02.patch, HDFS-9917-branch-2.7-002.patch, HDFS-9917-branch-2.7.patch,
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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