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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3030) InMemoryFileSystem.reserveSpaceWithChecksum does not look at failures while reserving space for the file in question
Date Mon, 17 Mar 2008 06:47:24 GMT
InMemoryFileSystem.reserveSpaceWithChecksum does not look at failures while reserving space
for the file in question
--------------------------------------------------------------------------------------------------------------------

                 Key: HADOOP-3030
                 URL: https://issues.apache.org/jira/browse/HADOOP-3030
             Project: Hadoop Core
          Issue Type: Bug
          Components: fs
            Reporter: Devaraj Das
             Fix For: 0.17.0


The return statement code in InMemoryFileSystem.reserveSpaceWithCheckSum looks like
{noformat}
  return (mfs.reserveSpace(f, size) && mfs.reserveSpace(getChecksumFile(f), checksumSize));
{noformat}

This should be broken up to check for successful reserveSpace for each of the components.
In some cases, we might reserve space for the first component and fail while doing the same
for the second (checksum file). This will lead to wastage of space since we don't un-reserve
the space we got for the first component. This usually won't happen due to the policy associated
with creating a file in the InMemoryFileSystem (since the checksum component is usually very
small) but still it should be fixed.

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