spacewalk server not checking in with its self

I've been working on other things for a few weeks. When checked today the spacewalk 2.4 server is no longer checking in with its self:

All the client are checking, its just the spacewalk server.

The services are running:

/usr/sbin/spacewalk-service  status

router (pid 23060) is running...

sm (pid 23068) is running...

c2s (pid 23076) is running...

s2s (pid 23084) is running...

tomcat6 (pid 23156) is running...                          [  OK  ]

httpd (pid  23246) is running...

osa-dispatcher (pid  23274) is running...

rhn-search is running (23296).

cobblerd (pid 13037) is running...

RHN Taskomatic is running (23365).

Any ideas where to look next?

Thanks,

GkenG