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https://issues.apache.org/jira/browse/HDFS-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13880862#comment-13880862
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Uma Maheswara Rao G commented on HDFS-5343:
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{code}
ToolRunner.run(conf, shell, new String[] { "-cat",
+ "/TestSnapshotFileLength/sub1/.snapshot/snapshot1/file1" });
+ assertEquals(bao.size(), BLOCKSIZE);
+ System.setOut(psBackup);
{code}
here System.setOut must be in try finally. Keep ToolRunner execution in try and
keep System.setOut in finally. Previous comment said about unnecessary catching
of exception.
> 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-5343-0003.patch, HDFS-5343-0004.patch,
> HDFS-5343-0005.patch, HDFS-5343-002.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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