[tor-bugs] #4015 [Torflow]: BwAuthority postgres scanner freezes with changes from #3679 TorCtl Event Parsing Rewrite

[Tor Bug Tracker & Wiki]

#4015: BwAuthority postgres scanner freezes with changes from #3679 TorCtl Event
Parsing Rewrite
---------------------+------------------------------------------------------
 Reporter:  aagbsn   |          Owner:  mikeperry
     Type:  defect   |         Status:  new      
 Priority:  major    |      Milestone:           
Component:  Torflow  |        Version:           
 Keywords:           |         Parent:  #3679    
   Points:           |   Actualpoints:           
---------------------+------------------------------------------------------

Comment(by mikeperry):

 Replying to [comment:2 mikeperry]:
 > Thoughts on ways to force a traceback/logs out of this piece of shit:
 >
 > kill -SIGINT child_pid  # To cause a KeyboardInterrupt traceback in a
 random python thread
 > kill -SIGKILL tor_pid   # To generate a traceback inside the read loop
 due to closed control port
 > kill -SIGHUP tor_pid    # To cause tor to send some random control port
 events during re-init
 >
 > Any others we can try?

 ps -eLf will give us the thread ids of the bw scanner children. We can try
 sending SIGINT, SIGALRM.

 We could also try attaching gdb and running "thread apply all backtrace"
 to get the actual python backtraces. Maybe those will yield clues.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4015#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online