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https://issues.apache.org/jira/browse/HDFS-4849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13688325#comment-13688325
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Konstantin Shvachko commented on HDFS-4849:
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Suresh, I still don't see what is wrong with the patch I provided. This is
about 30 line change (excluding tests), it is not a new feature, it is not
incompatible, doesn't change semantics and passes all tests. Sorry in advance
if I did not understand what scared you. I am trying to, so that I could fix
the problem and get a new patch.
Arun, if you need to proceed with the release please do. It's the prerogative
of RM to include or not certain patches. You asked to mark jiras blockers to
attract attention so I did. I thought Suresh had some concrete suggestions,
which I could have quickly corrected. But it is something else.
> Idempotent create and append operations.
> ----------------------------------------
>
> Key: HDFS-4849
> URL: https://issues.apache.org/jira/browse/HDFS-4849
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.0.4-alpha
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Priority: Blocker
> Attachments: idempotentCreate.patch, idempotentCreate.patch,
> idempotentCreate.patch
>
>
> create, append and delete operations can be made idempotent. This will reduce
> chances for a job or other app failures when NN fails over.
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