Exclusive locking actually can lock already locked file.
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                 Key: JRUBY-952
                 URL: http://jira.codehaus.org/browse/JRUBY-952
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules
    Affects Versions: JRuby 1.0.0RC1
            Reporter: Ola Bini
            Assignee: Ola Bini
            Priority: Minor
             Fix For: JRuby 1.0.0


If doing an exclusive lock on the same file from two JRuby processes, you will 
actually get a lock on both files. The reason for this is that the open code in 
IOHandlerSeekable actaully deleted the file when it was supposed to truncate 
it. The solution was to just truncate the existing file instead.

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