I am putting this question which is specifically related to weblogic I have never used any other app server Well one of our products eGain Mail in running on weblogic 5.1 service pack 8 and another product eGain Knowledge runs on 5.1 sp 9 Both of the products uses ejbs extensively Now when i try to connect from mail ejbs to knowledge ejbs It gives me communication exception One reason may be that knowledge server is in US and Mail server on my machine in India My machine is NT and US server is solaris Since we failed to connect, the US guys put the knowledge server also on sp8 since weblogic support team said that u need THE SAME SERVICE PACK so the we tried ejbs from sp8 to sp8 but still i am getting the same communication exception Can anybody please tell me if you have succesfully used ejbs communicating with ejbs. If yes which sp
I am really eager to know this other wise our integration of two products has to suffer
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Communication between EJBs is done over the Internet ? Yes?, so you need to know that EJBs use IIOP protocol to communicate (since EJB1.1). This protocol (TCP/535) is not recognized by the firewalls. So U need to ask to FireWalls Administrator or Network Admin to open the port 535 on TCP in order to let IIOP going through. Be careful, because it's a BIG security hole, IIOP is a "rich" protocol , a hacker could execute easily execute methods on yours distributed objets (EJB); and if U don't want to open firewall, you can choose to make HTTP tunneling for the IIOP. In this case ... U're lucky because all this stuff is implemented in WLS ... just have a look in the docs by searching HTTP tunneling The main problem of this manner of doing is that is not very performant (it seems to be a gaz machine to wrap IIOP into HTTP) but U have no choice. for your information, OMG , that is the founder of IIOP (with CORBA) works on a way to specify IIOP in order to make IIOP suitable for Firewalls.
Joined: Jan 02, 2001
Sorry forgot to mention these things I tried using T3,HTTP and IIOP Not sure how exactly tunneling is used We do not have proxy server/ firewall There is a leased line between US and India office If service packs are same T3 should have worked