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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-8838) [WINDOWS] FileLink assumptions are broken under NTFS
Date Sat, 29 Jun 2013 01:48:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-8838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Enis Soztutar updated HBASE-8838:

    Attachment: hbase-8838_v1.patch

Attaching a simple patch which makes TestFileLink pass on windows by first ensuring that the
reader is closed before rename. 

As per the description, I think we do not need to change the underlying FileLink assumptions
at this point. 
> [WINDOWS] FileLink assumptions are broken under NTFS
> ----------------------------------------------------
>                 Key: HBASE-8838
>                 URL: https://issues.apache.org/jira/browse/HBASE-8838
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>         Attachments: hbase-8838_v1.patch
> FileLink assumes that underlying files can be moved while there are open readers. Windows
does not allow the file which has active readers to be moved unless the file is opened in
shared mode. JDK6 and 7 open the file in exclusive mode by default, so moving the file while
there are readers is not possible. 
> Hadoop-on-windows copies the file, if it cannot perform the rename. This will cause duplication,
and the original file not being deleted. 
> This affects the unit test TestFileLink. On local mode over NTFS, reading from snapshot
files and replication might cause issues, but I don't think it has any other implications
on hbase+hdfs on windows.

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