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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7263) Snapshot read can reveal future bytes for appended files.
Date Fri, 14 Aug 2015 14:36:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14697117#comment-14697117
] 

Hudson commented on HDFS-7263:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #2214 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/2214/])
HDFS-7263. Snapshot read can reveal future bytes for appended files. Contributed by Tao Luo.
(vinayakumarb: rev fa2641143c0d74c4fef122d79f27791e15d3b43f)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> Snapshot read can reveal future bytes for appended files.
> ---------------------------------------------------------
>
>                 Key: HDFS-7263
>                 URL: https://issues.apache.org/jira/browse/HDFS-7263
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.5.0
>            Reporter: Konstantin Shvachko
>            Assignee: Tao Luo
>             Fix For: 2.7.0, 2.6.1
>
>         Attachments: HDFS-7263.patch, HDFS-7263.patch, HDFS-7263.patch, TestSnapshotRead.java
>
>
> The following sequence of steps will produce extra bytes, that should not be visible,
because they are not in the snapshot.
> * Create a file of size L, where {{L % blockSize != 0}}.
> * Create a snapshot
> * Append bytes to the file
> * Read file in the snapshot (not the current file)
> * You will see the bytes are read beoynd the original file size L



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