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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6537) Proposal for exceptions thrown by FileContext and Abstract File System
Date Wed, 03 Mar 2010 02:55:27 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sanjay Radia updated HADOOP-6537:
---------------------------------

      Resolution: Fixed
    Release Note: Detailed exceptions declared in FileContext and AbstractFileSystem
          Status: Resolved  (was: Patch Available)

+1 Committed. Thanks Suresh

> Proposal for exceptions thrown by FileContext and Abstract File System
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-6537
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6537
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jitendra Nath Pandey
>            Assignee: Suresh Srinivas
>             Fix For: 0.22.0
>
>         Attachments: hdfs-717.1.patch, hdfs-717.2.patch, hdfs-717.3.patch, hdfs-717.4.patch,
hdfs-717.patch, hdfs-717.patch
>
>
> Currently the APIs in FileContext throw only IOException. Going forward these APIs will
throw more specific exceptions.
> This jira proposes following hierarchy of exceptions to be thrown by FileContext and
AFS (Abstract File System) classes.
> InterruptedException  (java.lang.InterruptedException)
> IOException
>                 /* Following exceptions extend IOException */
>                 FileNotFoundException
>                 FileAlreadyExistsException
>                 DirectoryNotEmptyException
>                 NotDirectoryException
>                 AccessDeniedException
>                 IsDirectoryException
>                 InvalidPathNameException
>                 
>                 FileSystemException
>                                      /* Following exceptions extend FileSystemException
*/
>                                      FileSystemNotReadyException
>                                      ReadOnlyFileSystemException
>                                      QuotaExceededException
>                                      OutOfSpaceException
>                 RemoteException   (java.rmi.RemoteException)
> Most of the IOExceptions above are caused by invalid user input, while FileSystemException
is thrown when FS is in such a state that the requested operation cannot proceed.
> Please note that the proposed RemoteException is from standard java rmi package, which
also extends IOException.
>                             
> HDFS throws many exceptions which are not in the above list. The DFSClient will unwrap
the exceptions thrown by HDFS, and any exception not in the above list will be thrown as IOException
or FileSystemException.

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