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Re: unable to call EJB services in 4.0.5 installation from 5.1
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created by <a href="http://community.jboss.org/people/ron_sigal">Ron Sigal</a> in <i>JBoss Remoting</i> - <a href="http://community.jboss.org/message/645768#645768">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Max,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What you say is very plausible.  When you download an EJB, you're downloading a proxy with an invocation handler, so you're running an invocation handler targeted to Remoting 1.4.x and executing it in an environment where it's calling Remoting 2.4/2.5.  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>You are correct that the Remoting call in the EJB invocation handler isn't accessible to you.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When I do a Remoting release, I run a test suite that ensures that the new version is compatible with the old version, but the compatibility is at the Remoting level.  Your issue occurs outside of Remoting.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Given that the missing Client.connect() call is in the EJB invocation handler, I would suggest that you pose the question in the EJB forum.  I know that there are compatibility test suites somewhere, but I don't remember what they guarantee regarding AS 4 and AS 5.  It might be something like, AS 4 can make invocations on  AS 5 but not vice versa.  By the way, EJB2 and EJB3 are separate subsystems, so be sure to pose the question on the appropriate forum.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>One suggestion I can make would be to replace the jboss-remoting.jar that comes with AS 5.1 with the one in AS 4.0.5.  I can't guarantee that you won't discover other problems.  For example, JBossMessaging, EJB2, and EJB3 all use Remoting, and it's possible that JBossMessaging depends on Remoting 2.4/2.5.  If you're not using JBossMessaging, you might be OK.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>In the end, you might have to upgrade instance B, the server.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Sorry I couldn't give you a simpler answer.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>-Ron</p></div>
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