BIND 10 #134: xfrout not killed by SIGTERM

[BIND 10 Development]

#134: xfrout not killed by SIGTERM
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 Reporter:  jreed         |        Owner:     
     Type:  defect        |       Status:  new
 Priority:  major         |    Milestone:     
Component:  Unclassified  |   Resolution:     
 Keywords:                |    Sensitive:  0  
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Comment(by shane):

 Replying to [comment:4 shane]:
 > To do this "properly", bind10 should do something like this:
 >
 >   * Send a shutdown request to all processes
 >   * Wait for processes to die
 >   * When they all die, exit
 >   * If more than X seconds pass, send SIGTERM to all processes
 >   * Wait for processes to die
 >   * When they all die, exit
 >   * If more than X seconds pass, send SIGKILL to all processes
 >   * Wait for processes to die

 Additionally, we should probably kill msgq last, in case some process
 needs it to exit. This complicates things a bit.

 def terminate(processes, timeout=2.0):
     for process in processes:
         ask_politely_to_exit
     reap_all_processes(timeout)
     for process in processes:
         process.kill(SIGTERM)
     reap_all_processes(timeout)
     for process in processes:
         process.kill(SIGKILL)
     reap_all_processes(timeout)


 def shutdown():
     to_terminate = processes
     to_terminate.remove(msgq)
     terminate(to_terminate)
     terminate(msgq)

 Note this could slow things down if msgq was being unruly, but that is
 unlikely. :)

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Ticket URL: <http://bind10.isc.org/ticket/134#comment:5>
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