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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4679) Namenode operation checks should be done in a consistent manner
Date Wed, 10 Apr 2013 22:57:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13628395#comment-13628395
] 

Hudson commented on HDFS-4679:
------------------------------

Integrated in Hadoop-trunk-Commit #3589 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/3589/])
    HDFS-4679. Namenode operation checks should be done in a consistent manner. Contributed
by Suresh Srinivas. (Revision 1466721)

     Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1466721
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSafeMode.java

                
> Namenode operation checks should be done in a consistent manner
> ---------------------------------------------------------------
>
>                 Key: HDFS-4679
>                 URL: https://issues.apache.org/jira/browse/HDFS-4679
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>         Attachments: HDFS-4679.patch, HDFS-4679.patch
>
>
> Different operations performs checks in different order. I propose consistently checking
the following in namenode operations:
> # Print debug log related to the operation
> # validate the input parameters, file names
> # Grab read or write lock
> #* check if system is ready for read or write operation
> #* check if system is in safemode (for write operations)
> #* check permissions to see if the user is owner, has access or is super user privileges
> # Release the lock

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