BIND 10 #589: resolver is not closing connections

[BIND 10 Development]

#589: resolver is not closing connections
-------------------------------------+-------------------------------------
           Reporter:  jreed          |                      Owner:
               Type:  defect         |                     Status:  new
           Priority:  blocker        |                  Milestone:  feature
          Component:  Unclassified   |  backlog item
          Sensitive:  0              |                   Keywords:
Add Hours to Ticket:  0              |  Estimated Number of Hours:  0
        Total Hours:  0              |                  Billable?:  1
                                     |                  Internal?:  0
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 {{{
 [b10-resolver] Server failed: Too many open files
 [bind10] Process b10-resolver (PID 25251) terminated, exit status = 256
 [bind10] Resurrected b10-resolver (PID 321)
 }}}

 Growing:

 {{{
 t1:bind10$ fstat | grep b10-resolver | wc -l
       49
 t1:bind10$ fstat | grep b10-resolver | wc -l
       64
 }}}

 {{{
 t1:bind10$ fstat | grep b10-resolver | tail -3
 root     b10-resolver 27119   66* internet stream tcp ffff800001f41948
 127.0.0.1:53 <-> 127.0.0.1:55490
 root     b10-resolver 27119   67* internet stream tcp ffff800002b33008
 127.0.0.1:53 <-> 127.0.0.1:55489
 root     b10-resolver 27119   68* internet stream tcp ffff800002b33950
 127.0.0.1:53 <-> 127.0.0.1:55488
 }}}

 I run resolver continuously since mid December. I reinstalled once
 yesterday and once today. So I think is a regression in past 24 hours or
 so. I didn't bisect. Looks like only
 dab32ddc42b4707968fbc056261c50d4fa08e408 is related.

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Ticket URL: <http://bind10.isc.org/ticket/589>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development