[tor-bugs] #11553 [Tor]: Be more verbose when warning about not finding a circuit ID

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#11553: Be more verbose when warning about not finding a circuit ID
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     Reporter:  ra       |      Owner:
         Type:           |     Status:  needs_review
  enhancement            |  Milestone:  Tor: 0.2.5.x-final
     Priority:  major    |    Version:  Tor: 0.2.5.3-alpha
    Component:  Tor      |   Keywords:  tor-relay 024-backport 023-backport
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
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Comment (by nickm):

 b) I think that if this does turn out to be ignorable, we can downrate it
 even further.

 c) Hm. I don't have a great justification.  For any good N, N/2 and N*2
 are probably good choices too.  Basically, I wanted a number that wasn't
 too high, but which still gave a pretty small chance of failure when the
 space started to fill up.  For N=64, there's a one-in-a-million failure
 chance when the space is 80% full, and a one-in-850 chance when the space
 is 90% full, and a one-in-26 chance when the space is 95% full.  That
 seemed okay.

 d) So as to avoid spamming the log with junk.  I guess we could refine it
 to rate-limit it per channel.

 ra, are you able to test this patch over the weekend?  I'd like to know
 what kind of results it reports, and whether it indicates a possible bug
 in the #7351 code.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11553#comment:12>
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