[tor-bugs] #5512 [Stem]: Runner triggering occasional integ stacktrace

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#5512: Runner triggering occasional integ stacktrace
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 Reporter:  atagar  |          Owner:  atagar
     Type:  defect  |         Status:  new   
 Priority:  minor   |      Milestone:        
Component:  Stem    |        Version:        
 Keywords:          |         Parent:        
   Points:          |   Actualpoints:        
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 On rare occasions (roughly 1-2% of the time?) the integration tests end
 with the following stacktrace....

 {{{
 Exception in thread Tor Listener (most likely raised during interpreter
 shutdown):
 Traceback (most recent call last):
   File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
   File "/usr/lib/python2.7/threading.py", line 505, in run
   File "/home/atagar/Desktop/stem/stem/control.py", line 385, in
 _reader_loop
 <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute
 'socket'
 }}}

 This is a nonsensical stacktrace complaining about a missing module
 attribute. Most likely the problem is that the runner's reading daemon is
 outliving the tor process and encountering this during the interpretor
 shutdown.

 This should not happen. We should be joining on all runners after each
 test so either that isn't the case somewhere or there is a bug that is
 preventing the runner thread from being joined.

 First we should write a script that reliably reproduces this issue
 (probably running the integ tests a couple hundred times or however many
 are needed to reliably get this stacktrace). Second we should skip
 individual runner integration tests to narrow down which is causing this
 this stacktrace. Once we've narrowed down the haystack we can look at
 dealing with the issue.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5512>
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