Q: Console Message Question
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May 23, 2011 6:05 PMby William Boyd, Jr.,The person who started this thread on a different forum seems to have had the same problem, although he also seemed to be dealing with an environment that most Mac users never see.
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May 23, 2011 8:24 PMby buz,Certainly an environment this Mac user is unfamiliar with. This machine was shut down in the interim here and the first thing I checked was Console and no real change, it's got the date correct now but the time stamp is repeating.
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
I know someone knows something about this, it's just if I get lucky and they happen by. I took a look at Activity Monitor and Activity Monitor is using the most CPU - like 2.7, even more than Safari.
Guess I'll let it go a couple days and see if a clue comes along - maybe get ready to reinstall the system.
Thanks for the reply by the way William
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May 23, 2011 8:43 PMby buz,Just updating the confusion. The earlier message has now stopped it seems. Only to be replaced with ....
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
5/23/11 8:09:43 PM mDNSResponder[17] ERROR: getOptRdata - unknown opt 4
5/23/11 8:15:36 PM /usr/sbin/ocspd[381] starting
5/23/11 8:15:36 PM /usr/sbin/ocspd[381] starting
5/23/11 8:15:36 PM /usr/sbin/ocspd[381] starting
and on and on and on ...............
Sure could use a lesson in Console 101.
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May 24, 2011 7:15 AMby buz,Yeah, I appreciate the input. Left the machine run overnight and the two messages continue. They aren't continuous though, one will run a few minutes then stop, after a while the other pops up for a couple minutes.
Well, not gonna worry too much about it, at least for the moment - doesn't seem to be affecting performance.
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Dec 5, 2011 10:52 AMby Julian Daniel,A workstation or server entering sleep mode does a lookup for a _sleep-proxy._udp DNS record to find a sleep proxy to answer Wake-On-LAN requests on its behalf (using the EDNS0 Owner option (4)) in case an important packet is sent to the sleeping machine.
Older versions of Mac OS X Server don't know how to handle opt 4 requests coming from workstations running newer versions of Mac OS X, so the bizarre packet is logged but no action is taken. The more Snow Leopard machines you have, the more your log will fill with "mDNSResponder: ERROR: getOptRdata - unknown opt 4 " messages. You may have noticed that these messages get more frequent during times when workstations are heavily used, and that they mysteriously disappear outside of business hours - the reason, of course, is that all your workstations go to sleep and aren't being woken up until a human presses a key or mouse button the next day. Laptops running on battery are usually set to sleep more frequently, so large numbers of mobile users will fill your 10.4 server logs.
As has been already stated, you can safely ignore this message...or upgrade to Snow Leopard or Lion Server to eliminate it completely.
The Wikipedia entry for Bonjour Sleep Proxy is a good place to start your reading on this issue:
