BIND 10 #1518: 0 byte rotated log files when changing settings

[BIND 10 Development]

#1518: 0 byte rotated log files when changing settings
--------------------------------+-----------------------------------------
            Reporter:  jreed    |                        Owner:
                Type:  defect   |                       Status:  new
            Priority:  major    |                    Milestone:  New Tasks
           Component:  logging  |                     Keywords:
           Sensitive:  0        |              Defect Severity:  High
         Sub-Project:  Core     |  Feature Depending on Ticket:
Estimated Difficulty:  0        |          Add Hours to Ticket:  0
         Total Hours:  0        |                    Internal?:  0
--------------------------------+-----------------------------------------
 All my rotated log files were full of log entries. Changing debuglevel
 from 99 to 0 resulted in lost logs:

 {{{
 -rw-r--r--  1 root  wheel    7853 Dec 19 18:47 /var/log/bind10.log
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.1
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.2
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.3
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.4
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.5
 -rw-r--r--  1 root  wheel       0 Dec 19 18:47 /var/log/bind10.log.6
 -rw-r--r--  1 root  wheel     498 Dec 19 18:47 /var/log/bind10.log.7
 -rw-r--r--  1 root  wheel  169364 Dec 19 18:47 /var/log/bind10.log.8

 }}}

 These were all full a few seconds earlier. In addition, the new 8th file
 (that is my maxver) is now larger than the maxsize (30000).

 Jinmei told me in jabber: ``I sometimes see size-0 log files, too.''

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Ticket URL: <https://bind10.isc.org/ticket/1518>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development