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https://issues.apache.org/jira/browse/HDFS-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792352#comment-13792352
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Suresh Srinivas commented on HDFS-5343:
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Sathish, thanks for reporting this. This does seem like a bug. We limit the
length of how much can be read from the DFSOutputStream based on the length
recorded in the snapshot. I am surprised that it is not working in the cat
command. A fix along similar lines is what is needed. Let me know if you need
any help.
> 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
>
> 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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