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https://issues.apache.org/jira/browse/HDFS-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15194518#comment-15194518
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Brahma Reddy Battula commented on HDFS-9917:
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Before Full BR, all pending IBRs will be flushed.
In current problem case, size of IBR itself is huge than FBR,IBR itself failed.
because NN was not able to process it completely. thats why it kept
accumulating.
> 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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