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Posted to common-issues@hadoop.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2012/06/06 22:23:23 UTC

[jira] [Commented] (HADOOP-8486) Resource leak - Close the open resource handles (File handles) before throwing the exception from the SequenceFile constructor

    [ https://issues.apache.org/jira/browse/HADOOP-8486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290368#comment-13290368 ] 

Bikas Saha commented on HADOOP-8486:
------------------------------------

If I understand this right, Hive tries to create this object to validate file format and the creation fails often enough for a lot of tests to fail because of this issue. Isn't there a better way to validate the file format.

Back to this, are you sure about calling close() on a partially constructed object?

You are checking for in!=null but there is no explicit initialization of in to null to inform programmers about this dependency. Java default initializes in to null and so this works.
                
> Resource leak - Close the open resource handles (File handles) before throwing the exception from the SequenceFile constructor
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8486
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8486
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs, io
>    Affects Versions: 1.0.2
>            Reporter: Kanna Karanam
>         Attachments: HADOOP-8486-branch-1-win.patch
>
>
> I noticed this problem while I am working on porting HIVE to work on windows. Hive is attempting to create this class object to validate the file format and end up with resource leak. Because of this leak, we can’t move, rename or delete the files on windows when there is an open file handle whereas in UNIX we can perform all these operation with no issues even with open file handles.
> Please suggest me if you similar issues in any other places.

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