[ons-connect] Passive connection 127.0.0.1,6100 missing connect

Today i need to blog out my experience with SOA installation. I received an error stating in opmn.log during configuration of BPEL process manager

09/07/07 09:40:39 [ons-connect] Passive connection 127.0.0.1,6100 missing connect
09/07/07 09:40:39 [ons-connect] Passive connection 127.0.0.1,6100 missing connect

We can try a fix like this:
go to DATABASE oracle home /opmn/conf directory

vi ons.config
there you can find some entries like
localport=6100
remoteport=6200
loglevel=3

Change them safely to (add+1000)
localport=7100
remoteport=7200
loglevel=3

bounce the database listener.
Reason for local connect missing is:
Application server opmn.xml will be having the entry like

notification-server interface="ipv4"
port local="6100" remote="6200" request="6003"/

This port value gets conflict with the database ons process. So the issue arises.

Retry the operation that failed.