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Posted to hdfs-dev@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2014/10/18 00:39:33 UTC

[jira] [Created] (HDFS-7263) Snapshot read of an appended file returns more bytes than the file length.

Konstantin Shvachko created HDFS-7263:
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             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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