After completing integration with OAM 11Gr2 we hit below isssue .After struggling really hard for months and support involvement we found the fix was that port for ebsauth_R12 (i.e. accessgate deployement server was not correct in OHS mod wls file .
So in our setup of accessgate we have accessgate admin port 7050 and ebsauth_R12 or ebs deployment port 7051 .
We have defined port 7050 in mod_wl_ohs.conf on ohs that was cause of issue .Wheereas value shpuld have been 7051 as we have deployed accessgate not on admin but managed server .
On your Oracle HTTP Server, locate the file mod_wl_ohs.conf file in your $ORACLE_INSTANCE/config/OHS/ohs1 directory.
Correct value
============
WebLogicHost eaghost.example.com
WebLogicPort 7051
So in our setup of accessgate we have accessgate admin port 7050 and ebsauth_R12 or ebs deployment port 7051 .
We have defined port 7050 in mod_wl_ohs.conf on ohs that was cause of issue .Wheereas value shpuld have been 7051 as we have deployed accessgate not on admin but managed server .
On your Oracle HTTP Server, locate the file mod_wl_ohs.conf file in your $ORACLE_INSTANCE/config/OHS/ohs1 directory.
Correct value
============
WebLogicHost eaghost.example.com
WebLogicPort 7051