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https://issues.apache.org/jira/browse/HADOOP-6537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837092#action_12837092
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Sanjay Radia commented on HADOOP-6537:
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* AbstractFileSystem
** createFileSystem - you removed the javadoc for the args.
** fix the spelling error: throw new HadoopIllegalArgumentException("Unkown
CreateOpts of type " +
** createInternal - missing FileNotFoundException, ParentNotDirectory
** create, mkdir - missing ParentNotDirectory
** getFileLinkStatus - missing FileNotFoundException
** setVerifyChecksum - should not throw FileNotFoundException
* FileContext
** getFileLinkStatus and getLinkTarget - missing FileNotFoundException,
AccessDeniesEx, FileSystemNotSupportedEx
** mkdir - javadoc, ist line:
*** "Make the given file and all non-existent parents into directories."
Change to
*** "Make(create) a directory"
** createSymlink - missing detailed exceptions - same as create.
** exists(f) - should it return false instead of
UnsupportedFileSystemException?
** getContentSummary, listStatus(all variations), globStatus(??) - add the
UnresolvedLinkE
** copy - ParentNotDir, FileNotFound, UnresolvedLinkE
> 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.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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