[Backgroundrb-devel] Repeatedly dying with "failed to find slave socket"

[Jonathan del Strother]

I'm struggling to keep backgroundrb v2 running for more than 24  
hours.  It appears to be running fine for a while, then tries to fire  
off a worker (exactly the same worker it's been running for the past  
few hours), and it suddenly dies.  I haven't found any pattern for the  
cause of this.

In backgroundrb_server.log, the final entry is this :

20070206-10:41:45 (5189) Schedule triggered: #<struct #<Class: 
0x2afb643b56c0> job=#<Proc:0x00002afb63ed83c8 at .../vendor/plugins/ 
backgroundrb/server/lib/backgroundrb/middleman.rb:355>,  
trigger=#<BackgrounDRb::Trigger:0x2afb6546ccc0 @repeat_interval=600,  
@end_time=nil, @start_time=Tue Feb 06 03:41:45 -0800 2007>,  
earliest=Tue Feb 06 10:41:45 -0800 2007, last=Tue Feb 06 10:41:45  
-0800 2007>
20070206-10:41:45 (5189) failed to find slave socket - (RuntimeError)
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/slave-1.2.0/lib/ 
slave.rb:435:in `initialize'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/middleman.rb:210:in `new'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/middleman.rb:210:in `new_worker'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/thread_pool.rb:36:in `dispatch'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/thread_pool.rb:22:in `initialize'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/thread_pool.rb:22:in `new'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/thread_pool.rb:22:in `dispatch'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/middleman.rb:199:in `new_worker'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/middleman.rb:357:in `schedule_worker'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:46:in `call'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:46:in `run'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:40:in `each'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:40:in `run'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:35:in `loop'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:35:in `run'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:95:in `run'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:94:in `initialize'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:94:in `new'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/scheduler.rb:94:in `run'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb/middleman.rb:106:in `setup'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb_server.rb:306:in `run'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/application.rb:186:in `call'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/application.rb:186:in `start_proc'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/daemonize.rb:192:in `call'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/daemonize.rb:192:in `call_as_daemon'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/application.rb:190:in `start_proc'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/application.rb:226:in `start'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/controller.rb:69:in `run'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons.rb:182:in `run_proc'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/cmdline.rb:94:in `call'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons/cmdline.rb:94:in `catch_exceptions'
20070206-10:41:45 (5189) /usr/lib64/ruby/gems/1.8/gems/daemons-1.0.4/ 
lib/daemons.rb:181:in `run_proc'
20070206-10:41:45 (5189) .../vendor/plugins/backgroundrb/server/lib/ 
backgroundrb_server.rb:301:in `run'
20070206-10:41:45 (5189) .../script/backgroundrb:29



This happens both on my EngineYard server, and running locally on  
intel OS X 10.4.8.


Any suggestions?  Anyone else experiencing this?

Jon