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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7885) Datanode should not trust the generation stamp provided by client
Date Fri, 06 Mar 2015 19:06:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14350732#comment-14350732
] 

Hudson commented on HDFS-7885:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #7271 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/7271/])
HDFS-7885. Datanode should not trust the generation stamp provided by client. Contributed
by Tsz Wo Nicholas Sze. (jing9: rev 24db0812be64e83a48ade01fc1eaaeaedad4dec0)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockReaderLocalLegacy.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> 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
>             Fix For: 2.7.0
>
>         Attachments: h7885_20150305.patch, h7885_20150306.patch
>
>
> 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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