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https://issues.apache.org/jira/browse/HDFS-3605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413690#comment-13413690
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Uma Maheswara Rao G commented on HDFS-3605:
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Hi Todd,
Attached a patch which I am thiking of currently.
{quote}
I think we should separate the discussion of a potential optimization from the
discussion of fixing this bug.
{quote}
Sure. Infact that is not an optimization, its required in the approach which I
am thinking.
Please take a look and correct me, if I miss something in the patch as you and
Jitendra involved in that changes mainly.
Thanks a lot,
Uma
> Block mistakenly marked corrupt during edit log catchup phase of failover
> -------------------------------------------------------------------------
>
> Key: HDFS-3605
> URL: https://issues.apache.org/jira/browse/HDFS-3605
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, name-node
> Affects Versions: 2.0.0-alpha, 2.0.1-alpha
> Reporter: Brahma Reddy Battula
> Assignee: Todd Lipcon
> Attachments: HDFS-3605.patch, TestAppendBlockMiss.java
>
>
> Open file for append
> Write data and sync.
> After next log roll and editlog tailing in standbyNN close the append stream.
> Call append multiple times on the same file, before next editlog roll.
> Now abruptly kill the current active namenode.
> Here block is missed..
> this may be because of All latest blocks were queued in StandBy Namenode.
> During failover, first OP_CLOSE was processing the pending queue and adding
> the block to corrupted block.
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