[tor-bugs] #23693 [Core Tor/Tor]: 0.3.1.7: Assertion threadpool failed in cpuworker_queue_work

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#23693: 0.3.1.7: Assertion threadpool failed in cpuworker_queue_work
-------------------------------------------------+-------------------------
 Reporter:  alif                                 |          Owner:  nickm
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.4.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.1.9
 Severity:  Normal                               |     Resolution:
 Keywords:  prop286, 034-triage-20180328,        |  Actual Points:
  034-must crash 033-backport 032-backport       |
  031-backport                                   |
Parent ID:                                       |         Points:
 Reviewer:  asn                                  |        Sponsor:
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Comment (by teor):

 Maybe we will deprecate DirPort some time in the future. Maybe we won't,
 There are bootstrapping and diagnostic issues.

 But here are some questions we can answer right now:
 * Do we support DirPort without ORPort?
 * If we do, when was the last Tor release that it actually worked?
 * Why don't we have any tests for DirPort only operation?

 As far as I can tell, people who get this bug seem to be setting DirPort
 as a workaround.
 They don't actually want to serve descriptors, they just want them
 available locally.

 If we can't find a use case that involves serving descriptors, I think we
 should:
 * fix the hibernation options so they allow people to download descriptors
 every hour if that's what they need, then
 * deprecate DirPort-only operation

 But I'm not sure if we can remove features as a backport, so we are stuck
 with fixing crashes like this (or saying "don't do that").

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23693#comment:34>
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