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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5343) When cat command is issued on snapshot files getting unexpected result
Date Tue, 15 Oct 2013 07:59:44 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13794974#comment-13794974

Jing Zhao commented on HDFS-5343:

Besides, some comments for the new unit test part:
# We may want to increase the timeout value from 6s to maybe 60s. 6s is too short and it can
even cause timeout in my laptop.
# Instead of calling read(long, byte[], int, int), we should call read(byte[], int, int) to
reproduce the bug. Otherwise the new unit test can pass even without the fix (since for "-cat"
the unit test does not check result).
# Need to clean the imports section.
# We can call DFSTestUtil#createFile and DFSTestUtil#appendFile to make the test code shorter
and cleaner.

> When cat command is issued on snapshot files getting unexpected result
> ----------------------------------------------------------------------
>                 Key: HDFS-5343
>                 URL: https://issues.apache.org/jira/browse/HDFS-5343
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>            Reporter: sathish
>            Assignee: sathish
>         Attachments: HDFS-5343-001.patch
> first if we create one file with some file length and take the snapshot of that file,and
again append some data through append method to that file,then if we do cat command operation
on snapshot of that file,in general it should dispaly the data what we added with create operation,but
it is displaying the total data i.e. create +_ appended data.
> but if we do the same operation and if we read the contents of snapshot file through
input stream it is just displaying the data created in snapshoted files.
> in this the behaviour of cat command and reading through inputstream is getting different

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