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



#4015: BwAuthority postgres scanner freezes with changes from #3679 TorCtl Event
Parsing Rewrite
---------------------+------------------------------------------------------
 Reporter:  aagbsn   |          Owner:  mikeperry
     Type:  defect   |         Status:  new      
 Priority:  normal   |      Milestone:           
Component:  Torflow  |        Version:           
 Keywords:           |         Parent:  #3679    
   Points:           |   Actualpoints:           
---------------------+------------------------------------------------------
 BwAuthority, postgres, and the changes in #3679 provide the perfect storm
 for more BwAuthority freezes.

 Initially everything works fine, but 2 days later 2 of my scanners had
 halted. I restarted them and another froze in about a day.

 This looks similar to the problem arma raises in #3834, where the scanner
 freezes without WARN, ERROR, so it may be db locking related:

 {{{
 INFO[Tue Sep 13 16:16:38 2011]:Waiting on consensus result: False
 DEBUG[Tue Sep 13 16:16:38 2011]:Deleting ignored stream: 12028
 INFO[Tue Sep 13 16:16:38 2011]:Newdesc timer is up. Assuming we have full
 consensus
 INFO[Tue Sep 13 16:16:38 2011]:Consensus change... Updating rank history
 }}}

 This problem appears to have been introduced or exposed with these
 changes. The bwauth VM and my testing vm have not frozen with the old
 Event Parsing code.

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