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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6602) PendingDeletionBlocks on SBN keeps increasing
Date Wed, 25 Jun 2014 20:19:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14043993#comment-14043993
] 

Kihwal Lee commented on HDFS-6602:
----------------------------------

Block report processing is actually okay. All types of block report processing goes through
{{BlockManager#processReportedBlock()}} and any report from future is queued.  It is {{delete()}}
that causes this queue to be populated. After collecting all blocks to be invalidated, {{BlockManager#removeBlock()}}
 is called, which calls {{addToInvalidates()}}.  If NN is in standby, {{addToInvalidates()}}
should not be called.


> PendingDeletionBlocks on SBN keeps increasing
> ---------------------------------------------
>
>                 Key: HDFS-6602
>                 URL: https://issues.apache.org/jira/browse/HDFS-6602
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.5.0
>            Reporter: Kihwal Lee
>            Priority: Critical
>
> PendingDeletionBlocks is from BlockManager.invalidateBlocks.numBlocks(). It
> means this data structure is populated, but IBR (incremental block reports) do not cause
deleted blocks to be removed from it. As a result, the heap usage keeps increasing.



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