[tor-bugs] #31331 [Core Tor/sbws]: scanner integration test fails some times because the test Web server is not multi-threaded

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#31331: scanner integration test fails some times because the test Web server is
not multi-threaded
-------------------------------+-------------------------------
     Reporter:  juga           |      Owner:  (none)
         Type:  defect         |     Status:  new
     Priority:  Medium         |  Milestone:  sbws: unspecified
    Component:  Core Tor/sbws  |    Version:  sbws: 1.1.0
     Severity:  Normal         |   Keywords:
Actual Points:                 |  Parent ID:
       Points:  1              |   Reviewer:
      Sponsor:                 |
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 Because the Python Web server used for the integration tests is not multi-
 threaded, some relays' circuits timeout.
 Most of the cases, this is desired since in a public network this would
 happen too.
 It is not desired in the case that the integration test check for a
 concrete relay measurement success, which is
 `tests/integration/core/test_scanner.py::test_measure_relay_with_maxadvertisedbandwidth`
 (https://travis-ci.org/torproject/sbws/jobs/565274602#L1971).
 This case can be solved by checking the descriptor bandwidth, not the
 measurement.
 Ideally, the Python Web server should be changed to be multi-threaded and
 shutting down some relays for the cases where the tests check failures.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31331>
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