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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7659) fs -getmerge isn't guaranteed to work well over non-HDFS filesystems
Date Tue, 20 Sep 2011 07:06:09 GMT
fs -getmerge isn't guaranteed to work well over non-HDFS filesystems
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                 Key: HADOOP-7659
                 URL: https://issues.apache.org/jira/browse/HADOOP-7659
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
    Affects Versions: 0.20.204.0
            Reporter: Harsh J
            Priority: Minor
             Fix For: 0.24.0


When you use {{fs -getmerge}} with HDFS, you are guaranteed file list sorting (part-00000,
part-00001, onwards). When you use the same with other FSes we bundle, the ordering of listing
is not guaranteed at all. This is cause of http://download.oracle.com/javase/6/docs/api/java/io/File.html#list()
which we use internally for native file listing.

This should either be documented as a known issue on -getmerge help pages/mans, or a consistent
ordering (similar to HDFS) must be applied atop the listing. I suspect the latter only makes
it worthy for what we include - while other FSes out there still have to deal with this issue.
Perhaps we need a recommendation doc note added to our API?

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