BIND 10 #1704: log output mixed

[BIND 10 Development]

#1704: log output mixed
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                   Reporter:  jreed  |                 Owner:
                       Type:         |                Status:  new
  defect                             |             Milestone:
                   Priority:         |  Sprint-20120403
  medium                             |            Resolution:
                  Component:         |             Sensitive:  0
  logging                            |           Sub-Project:  Core
                   Keywords:         |  Estimated Difficulty:  15
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by shane):

 So the mixing of these messages is not completely random. They appear to
 be in blocks. My suspicion is that the underlying Unix write() gets called
 for each element:

  * date/time
  * level
  * process/library
  * message

 I think this issue is that on console output to stderr this write gets
 flushed immediately, not at end of line, because the C++ output library
 does not buffer writes at all.

 When writing to a file, the C++ output library buffers, but then we tell
 log4cplus to flush at the end of each log message, which is exactly
 correct.

 If this is correct we should be able to fix this problem for the console
 by ''enabling'' buffering for cerr.

-- 
Ticket URL: <http://bind10.isc.org/ticket/1704#comment:15>
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