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https://issues.apache.org/jira/browse/HADOOP-6537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831198#action_12831198
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Suresh Srinivas commented on HADOOP-6537:
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@Philip - Your comment is not very clear. Current proposal does not use
FileSystemException. As regards to local and Hadoop, the APIs are the same. Not
sure about the issue you have with it.
> 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.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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