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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4679) Namenode operation checks should be done in a consistent manner
Date Wed, 10 Apr 2013 01:31:14 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Suresh Srinivas updated HDFS-4679:
----------------------------------

    Attachment: HDFS-4679.patch

Updated patch with unit test changed to expecte SafeModeException from setTimes operation.
                
> 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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