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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9357) Fallback to default authority if not specified in FileContext
Date Wed, 03 Apr 2013 19:45:19 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HADOOP-9357:
--------------------------------

     Target Version/s: 2.0.5-beta
    Affects Version/s: 2.0.0-alpha
        Fix Version/s:     (was: 2.0.4-alpha)
         Hadoop Flags: Incompatible change,Reviewed  (was: Reviewed)
    
> Fallback to default authority if not specified in FileContext
> -------------------------------------------------------------
>
>                 Key: HADOOP-9357
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9357
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>            Priority: Minor
>         Attachments: hadoop-9357-1.patch, hadoop-9357-2.patch, hadoop-9357-3.patch, hadoop-9357-testfixup.patch
>
>
> Currently, FileContext adheres rather strictly to RFC2396 when it comes to parsing absolute
URIs (URIs with a scheme). If a user asks for a URI like "hdfs:///tmp", FileContext will error
while FileSystem will add the authority of the default FS (e.g. turn it into "hdfs://defaultNN:port/tmp").

> This is technically correct, but FileSystem's behavior is nicer for users and okay based
on 5.2.3 in the RFC, so lets do it in FileContext too:
> {noformat}
> For backwards
> compatibility, an implementation may work around such references
> by removing the scheme if it matches that of the base URI and the
> scheme is known to always use the  syntax.  The parser
> can then continue with the steps below for the remainder of the
> reference components.  Validating parsers should mark such a
> misformed relative reference as an error.
> {noformat}

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