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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7263) Snapshot read of an appended file returns more bytes than the file length.
Date Fri, 17 Oct 2014 22:39:33 GMT
Konstantin Shvachko created HDFS-7263:
-----------------------------------------

             Summary: Snapshot read of an appended file returns more bytes than the file length.
                 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


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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