BIND 10 #3187: failed to open sockets after server reconfiguration

[BIND 10 Development]

#3187: failed to open sockets after server reconfiguration
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                   Reporter:         |                 Owner:
  wlodekwencel                       |                Status:  new
                       Type:         |             Milestone:  DHCP-QA
  defect                             |  Defects
                   Priority:         |              Keywords:  socket
  medium                             |             Sensitive:  0
                  Component:  dhcp6  |           Sub-Project:  DHCP
               CVSS Scoring:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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 I'm getting this error:
 Error: failed to open sockets after server reconfiguration: Failed to bind
 socket 8 to fe80::a00:27ff:fe11:c767/port=547

 Unfortunately I can't find any pattern, it seems to occur randomly in
 process of starting/stopping/configuration Kea. I get it 2-5 times in 300
 test set (at least one start, configuration and stop process in one test)
 that makes 2-5 errors in 900 commits in bindctl.

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Ticket URL: <http://bind10.isc.org/ticket/3187>
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BIND 10 Development