BIND 10 #277: cmdctl needs nicer warning if address already in use

[BIND 10 Development]

#277: cmdctl needs nicer warning if address already in use
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      Reporter:  jreed    |        Owner:  zhanglikun
          Type:  defect   |       Status:  reviewing 
      Priority:  minor    |    Milestone:            
     Component:  cmd-ctl  |   Resolution:            
      Keywords:           |    Sensitive:  0         
Estimatedhours:           |        Hours:            
      Billable:  1        |   Totalhours:            
      Internal:  0        |  
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Changes (by jinmei):

  * owner:  jreed => zhanglikun
  * internal:  => 0
  * billable:  => 1


Comment:

 Replying to [comment:1 zhanglikun]:
 > Jeremy, Please have a test for this patch .

 I'd catch the exception in SecureHTTPServer.__init__ and handle
 accordingly.

 socket.error is pretty broad, and since __main__ is far from the error
 happened I'm afraid the error handling could be vague (for the user to
 identify the cause of the trouble).

 Also, please add a test case for this.

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Ticket URL: <http://bind10.isc.org/ticket/277#comment:2>
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