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https://issues.apache.org/jira/browse/HADOOP-9597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666025#comment-13666025
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Suresh Srinivas commented on HADOOP-9597:
-----------------------------------------
Jerry, please do not open jiras for asking questions. Jiras are for reporting
problem.
FileSystem.java is not well documented and is implemented differently by
different file systems. My recommendation would be to follow
DistributedFileSystem implementation. You could also use FileContext javadoc to
guide in what exception to throw.
> FileSystem open() API is not clear if FileNotFoundException is throw when the
> path does not exist
> -------------------------------------------------------------------------------------------------
>
> Key: HADOOP-9597
> URL: https://issues.apache.org/jira/browse/HADOOP-9597
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation, fs
> Affects Versions: 2.0.4-alpha
> Reporter: Jerry He
> Priority: Minor
> Fix For: 2.0.4.1-alpha
>
>
> The current FileSystem open() method throws a generic IOException in its API
> specification.
> Some FileSystem implementations (DFS, RawLocalFileSystem ...) throws more
> specific FileNotFoundException if the path does not exist. Some throws
> IOException only (FTPFileSystem, HftpFileSystem ...).
> If we have a new FileSystem implementation, what should we follow exactly for
> open()?
> What should the application expect in this case.
>
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