Here is an error that I ran across and how I fixed it.
Error in EMHub error log:
<Jul 17, 2008 2:53:48 PM EDT> <Notice> <Stdout> <000000> <WARN [ACTIVE] ExecuteT
hread: ‘0’ for queue: ‘weblogic.kernel.Default (self-tuning)’ EMF_CATEGORY – Una
ble to register peer com.peoplesoft.emf.peer:id=2 with the EMHub>
Error that PSAgent gives:
ERROR main EMF_CATEGORY – Error while connecting to ‘http://pserv01:8000/PSEMHUB /hub’.
ERROR main EMF_CATEGORY – Error: Internal Exception: – Error registering peer
ERROR main EMF_CATEGORY – Error while connecting to server – retrying attempt 1
The fix was to reset the GUI
select GUID from PSOPTIONS
UPDATE PSOPTIONS SET GUID = ‘ ‘
Then, you need to restart the application server and the web server.