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https://issues.apache.org/jira/browse/HDFS-7885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14348024#comment-14348024
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Tsz Wo Nicholas Sze commented on HDFS-7885:
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I see. The problem is only in legacy.blockreader.local, which uses the
generation stamp passed by client. Just have checked the remote block reader.
It does not have such bug.
> Datanode should not trust the generation stamp provided by client
> -----------------------------------------------------------------
>
> Key: HDFS-7885
> URL: https://issues.apache.org/jira/browse/HDFS-7885
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.2.0
> Reporter: vitthal (Suhas) Gogate
> Assignee: Tsz Wo Nicholas Sze
> Priority: Critical
>
> Datanode should not trust the generation stamp provided by client, since it
> is prefetched and buffered in client, and concurrent append may increase it.
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