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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7943) Append cannot handle the last block with length greater than the preferred block size
Date Tue, 17 Mar 2015 18:20:39 GMT
Jing Zhao created HDFS-7943:
-------------------------------

             Summary: Append cannot handle the last block with length greater than the preferred
block size
                 Key: HDFS-7943
                 URL: https://issues.apache.org/jira/browse/HDFS-7943
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.7.0
            Reporter: Jing Zhao
            Assignee: Jing Zhao
            Priority: Blocker


In HDFS-3689, we remove the restriction from concat that all the source files should have
the same preferred block size with the target file. This can cause a file to contain blocks
with size larger than its preferred block size.

If such block happens to be the last block of a file, and later we append data to the file
without the {{CreateFlag.NEW_BLOCK}} flag (i.e., appending data to the last block), looks
like the current client code will keep writing to the last block and never allocate a new
block.



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