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From "Kousuke Saruta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5895) Temporary Index File can not be cleaned up because OutputStream doesn't close properly
Date Tue, 20 May 2014 08:35:38 GMT
Kousuke Saruta created MAPREDUCE-5895:
-----------------------------------------

             Summary: Temporary Index File can not be cleaned up because OutputStream doesn't
close properly
                 Key: MAPREDUCE-5895
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5895
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: client
    Affects Versions: 3.0.0
            Reporter: Kousuke Saruta


In TaskLog.java, Temporary Index File is created by following code.

{code}
BufferedOutputStream bos =
  new BufferedOutputStream(
    SecureIOUtils.createForWrite(tmpIndexFile, 0644));
DataOutputStream dos = new DataOutputStream(bos);
{code}

The code is surrounded by try-finally so if some Exception/ERROR is thrown between constructing
bos and dos, temporary file is not cleaned up.
I met the situation that when a thread ran, OOM was thrown after bos created and temporary
file is not cleaned up. At different time, another thread executed same logic and fail because
of FileAlreadyExistsException.



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