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From "Liu Shaohui (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9897) A failed atomic folder rename operation can never recovery for the destination file is deleted in Wasb filesystem
Date Thu, 03 Mar 2016 14:06:18 GMT
Liu Shaohui created HDFS-9897:
---------------------------------

             Summary: A failed atomic folder rename operation can never recovery for the destination
file is deleted in Wasb filesystem
                 Key: HDFS-9897
                 URL: https://issues.apache.org/jira/browse/HDFS-9897
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Liu Shaohui
            Priority: Critical




When using Wsab file system, we found that a failed atomic folder rename operation can never
recovery for the destination file deleted in Wasb filesystem.
{code}
ls: Attempting to complete rename of file hbase/azurtst-xiaomi/data/default/YCSBTest/.tabledesc
during folder rename redo, and file was not found in source or destination.
{code}

The reason is the the file is renamed to the destination file before the crash, and the destination
file is deleted by another process after crash. So the recovery is blocked during finishing
the rename operation of this file when found the source and destination files all don't exist.

See: NativeAzureFileSystem.java #finishSingleFileRename

Another serious problem is that the recovery of atomic rename operation may delete new created
file which is same name as the source file, because the file system don't check if there are
rename operation need be redo.

Suggestions are welcomed~




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