[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2149: "tahoe start" emits an error message when tahoe is already running

[Tahoe-LAFS]

#2149: "tahoe start" emits an error message when tahoe is already running
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     Reporter:  zooko           |      Owner:  daira
         Type:  enhancement     |     Status:  assigned
     Priority:  normal          |  Milestone:  1.12.0
    Component:  code-nodeadmin  |    Version:  1.10.0
   Resolution:                  |   Keywords:  usability error cli
Launchpad Bug:                  |
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Comment (by daira):

 ... and there isn't any "don't complain if already running" option to
 `twistd`.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2149#comment:16>
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