[tor-bugs] #28927 [Core Tor]: TB 8.5a6 using obfs4 did not leave dormant mode on request

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#28927: TB 8.5a6 using obfs4 did not leave dormant mode on request
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     Reporter:  traumschule  |      Owner:  (none)
         Type:  defect       |     Status:  new
     Priority:  Medium       |  Milestone:
    Component:  Core Tor     |    Version:  Tor: 0.3.5.5-alpha
     Severity:  Normal       |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |   Reviewer:
      Sponsor:               |
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 Today a long running TB 8.5a6 using obfs4 repeatedly logged about being in
 dormant mode and did not build any circuits for existing and new tabs
 until the bridge was disabled. Then everything worked again.

 Tor version: 0.3.5.5-alpha (git-a2ecc19ab923f34c) running on Linux with
 Libevent 2.1.8-stable, OpenSSL 1.0.2q, Zlib 1.2.8, Liblzma N/A, and
 Libzstd N/A.

 Related: #2149, #25375, #28335, #28847, #28849

 Steps to reproduce:
 1. Start a fresh TB 8.5a6 with {{{--debug --log}}} and enable obfs4.
 2. Use it for some days.
 3. Let it run idle for some hours.
 Step 2 may be optional, the computer was suspended several times but not
 the day this bug happened.

 Will add the exact message when it happens again.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28927>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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