[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3038: Many Python 2.7 macOS builds fail with "Too many open files"

[Tahoe-LAFS]

#3038: Many Python 2.7 macOS builds fail with "Too many open files"
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     Reporter:  exarkun  |      Owner:  exarkun
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  undecided
    Component:  unknown  |    Version:  1.12.1
   Resolution:           |   Keywords:
Launchpad Bug:           |
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Comment (by exarkun):

 It seems more reproducible using tox than running trial directory.  Two
 tox runs both encountered it, two direct trial runs both passed.

 Also, using some grep magic with lsof, I see that
 allmydata.test.test_system.SystemTest?.test_upload_and_download_convergent
 seems to want to open up around 150 fds.  So if there are already ~100
 open then it's going to run into the macOS limit.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3038#comment:8>
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