[tor-bugs] #16296 [Onionoo]: Implement lock file in a more robust way

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#16296: Implement lock file in a more robust way
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     Reporter:  karsten  |      Owner:
         Type:  defect   |     Status:  needs_review
     Priority:  normal   |  Milestone:
    Component:  Onionoo  |    Version:
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by leeroy):

 I think I might have done something wrong the first time. I obtained a
 file channel then checked the locking and it would allow acquiring an
 exclusive lock, as well as I/O in another JVM. I now open the file using
 the file channel directly and the exclusive locking appears to work.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16296#comment:7>
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