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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14048) REDO operation of WASB#AtomicRename of folder should create placeholder blob for destination folder
Date Tue, 07 Mar 2017 00:53:33 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mingliang Liu updated HADOOP-14048:
-----------------------------------
    Summary: REDO operation of WASB#AtomicRename of folder should create placeholder blob
for destination folder  (was: The REDO operation of AtomicRename of folder doesn't create
a placeholder blob for destination folder)

> REDO operation of WASB#AtomicRename of folder should create 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
>         Attachments: HADOOP-14048.patch
>
>
> 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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