QUOTE (aussie_dba @ Jul 2 2008, 01:27 PM)
Is your listener runnung for the OEM repository?
That's often the cause of a 503 error, bounce your listener.
Are you using grid control? Did you start these services?
/bin/emctl start iasconsole
/bin/emctl start agent
yes, I am using grid control. I restarted all oracle services, which doesn't seem to help. I noticed that after my listener is restarted, I sometimes get the following error: TNS-12519 TNS:no appropriate service handler found.
I increased my processes from 150 to 200 which may have solved this TNS-12519 error. I hope.
Any more suggestions?