wotaskd bombing out, known error codes?

Our server has a cron reboot once a week which normally causes no problems, 
except this weekend wotaskd bombed out after the restart following reboot, 
leaving all our apps inaccessible. I found the following in 
/var/log/webobjects.log.1

-------------------------------------------------------------------------
javawoservice.sh: `wotaskd' is starting up ...
[2005-09-03 02:00:54 BST] <main> Multicast Response Disabled
[2005-09-03 02:00:54 BST] <Thread-0> Created UDP socket; listening for 
requests...
[2005-09-03 02:00:54 BST] <main> The URL for webserver connect is:
http://plug/cgi-bin/WebObjects/wotaskd.woa/-1085
The URL for direct connect is:
http://plug:1085/cgi-bin/WebObjects/wotaskd.woa
[2005-09-03 02:00:55 BST] <main> null
[2005-09-03 02:00:54 BST] <main> Waiting for requests...
javawoservice.sh: `wotaskd' exited.
  .  `wotaskd' terminated with an error (`143').  Scaling wait time ...
  .  Execution not counted as a success.
javawoservice.sh: `wotaskd' will restart in 5 seconds ...


I don't know what happened after 5 seconds, as there is no more logging.

All my WO apps appeared to start up ok and were waiting in vain for 
requests to arrive.

  Is there a mapping of error code magic numbers (143) to "meaningful 
message" somewhere?

Has anyone else experienced anything similar?

If I can't get to the bottom of what went wrong, what safeguards / 
workarounds could I put in place?

Thank you for your time
John