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From "NITIN VERMA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14048) The REDO operation of AtomicRename of folder doesn't create a placeholder blob for destination folder
Date Thu, 02 Feb 2017 07:42:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15849592#comment-15849592
] 

NITIN VERMA commented on HADOOP-14048:
--------------------------------------

I am testing the patch and will submit a fix soon.

> The REDO operation of AtomicRename of folder doesn't create a placeholder blob for destination
folder
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14048
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14048
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/azure
>            Reporter: NITIN VERMA
>            Assignee: NITIN VERMA
>
> While doing manual testing, I realized that the crash recovery of AtomicRename operation
of a folder in AzureNativeFileSystem doesn't create a placeholder property blob for destination
folder. Due to this bug, the destination folder can not be renamed again.
> Below is how I tested this:
> 1. Create a test directory as "/test/A"
> 2. Create 15 block blobs in "/test/A" folder.
> 3. Run "hadoop fs -mv /test/A /test/B" command and crash it as soon as /test/A-RenamePending.json
file is created.
> 4. Now run "hadoop fs -lsr /test" command, which should complete the pending rename operation
(redo) as a part of crash recovery. 
> 5. The REDO method copies the pending files from source folder to destination folder
(by consulting A-RenamePending.json file), but it doesn't create a 0-byte property blob for
/test/B folder, which is a bug as that folder will not be usable for many operations. 



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