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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3030) InMemoryFileSystem.reserveSpaceWithChecksum does not look at failures while reserving space for the file in question
Date Mon, 17 Mar 2008 14:43:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579459#action_12579459

Hadoop QA commented on HADOOP-3030:

-1 overall.  Here are the results of testing the latest attachment 
against trunk revision 619744.

    @author +1.  The patch does not contain any @author tags.

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests -1.  The patch failed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1982/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1982/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1982/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1982/console

This message is automatically generated.

> 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
>            Assignee: Devaraj Das
>             Fix For: 0.17.0
>         Attachments: hadoop-3030.patch
> 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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