[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3695: Improve error messaging in integration testing

[Tahoe-LAFS]

#3695: Improve error messaging in integration testing
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     Reporter:  maylee   |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  Integration and Unit Testing
    Component:  unknown  |    Version:  n/a
   Resolution:           |   Keywords:
Launchpad Bug:           |
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Description changed by exarkun:

Old description:

> Some ideas/discussion:
> - One enduser improvement could be to turn off non-useful error messages
> - Some kind of helpful action should be suggested in an error message
> - Sysadmin logging with no error messages (set up new logger and there
> will be at least some improvement at the debug level)
> - Improve non-`Foolscap` logging (use `Eliot`-based logging?)
>
> @meejah suggests this filter:
> https://github.com/LeastAuthority/magic-
> folder/pull/306/commits/608d38748920fe856a165e9adfab54e9b43f990c

New description:

 Some ideas/discussion:
 - One enduser improvement could be to turn off non-useful error messages
 - Some kind of helpful action should be suggested in an error message
 - Sysadmin logging with no error messages (set up new logger and there
 will be at least some improvement at the debug level)
 - Switch all logging to new Twisted logging library
 - Improve non-`Foolscap` logging (use `Eliot`-based logging?)

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3695#comment:1>
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