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