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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8422) FileSystem#getDefaultBlockSize and Replication don't use the given path
Date Wed, 23 May 2012 20:19:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13281870#comment-13281870
] 

Eli Collins commented on HADOOP-8422:
-------------------------------------

One reason I'm not super thrilled with backporting the new APIs from HADOOP-8014 to branch-1
and introducing uses of them in other projects like HBase is that it means new HBase releases
won't work on all but the most recent releases of 1.x. This is a rare / unfortunate case where
federation violates the FileSystem API (which assumes there's a default file system associated
with a FileSystem object) so users who want to support federation have to give up working
transparently on older releases. Don't see a great alternative though, and at least this gives
people a transition path.

Here's my proposal:
# Deprecate the FileSystem#getDefault* and getServerDefault methods that don't take a Path
in trunk and branch-2 since these uses aren't valid (their programs will break if the user
ever switches to using viewfs) 
# Add the methods that take a Path to branch-1 for the Hadoop 1.1 release so people can transition

Reasonable?
                
> FileSystem#getDefaultBlockSize and Replication don't use the given path
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-8422
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8422
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 1.0.3
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>            Priority: Minor
>
> The javadocs for FileSystem#getDefaultBlockSize and FileSystem#getDefaultReplication
claim that "The given path will be used to locate the actual filesystem" however they both
ignore the path.

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