Calling EJB in JServer is horribly slow ..

Question

Hi!
Beeing somewhat dissatisfied with the stabiblity of OAS I tried porting my application to Apache+JServ+Oracle 8.1.6.
(Apache 1.3.12, JServ 1.1.2, BD JDK 1.2.2, 8i 8.1.6.1 all on Linux since I didn't want to wreck my OAS environment)
I found out that I would have to rewrite parts of my EJB:s since 8i makes all beans stateful and forces use of EJB transaction handling if one wants to do any SQL querys. I do a stateless, transactionless design (other that the database manipulations that is) to avoid to much meddling by the container.
I did a quick but not completely solid fix for it an managed to get everything working in the the new environment only to find that it was horribly slow.
Calling an EJB method from a servlet takes about two seconds and calling an EJB method from another EJB takes about four seconds.
all that time spent calling down into the EJB, logging just prior to a call and as the first thing in the method show this quite clearly.
Something similar is going on when deploying beans to 8i, A small beans takes several minutes to deploy.
This is on a PIII600 with 256MB of RAM and no apparent swapping going on. No errors of any kind in any logs except for the occasional "soft session limit exceeded" if the Jserver log.
Anyone got an explanation ? Is it faster on Solaris or ????
/Ulf

Answer 1

Leslie,
If both the applications containing the Client/JSPs and EJBs are deployed in the same OC4J container in different applications you donot have to use RMIInitialContextFactory and you can just use the default Context e.g. as follows as if both EJBs and servlets are in the same application.
Context ctx = new InitialContext();
You have to make the EJB application as parent for your appliaction containing web-tier i.e. JSPs as follows in the server.xml
<application name=EJBApps path=ejb1.ear />
<application name=WebtierApps path=web1.ear parent=EJBApps />
regards
Debu Panda
Oracle
Hi All,
I write a jsp to call a EJB in a different Application deployed in OC4J 9.0.3.
the source code is:
<%
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "manager");
env.put(Context.PROVIDER_URL, "ormi://mycomputer/employee");
Context ctx = new InitialContext(env);
Object obj = ctx.lookup("HelloWorld");
HelloWorldHome home =(HelloWorldHome)
javax.rmi.PortableRemoteObject.narrow(obj,HelloWorldHome.class);
HelloWorld hello = home.create();
out.println(hello.hello());
%>
And the error message:
java.lang.ClassCastException
     at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(Unknown Source)
     at javax.rmi.PortableRemoteObject.narrow(Unknown Source)
     at try.jspService(_try.java:67)
     [SRC:/try.jsp:15]
     at com.orionserver[Oracle9iAS (9.0.3.0.0) Containers for J2EE].http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
But this code, I can run successfully in a Client java class.
And if I put the jsp and the EJB in a same application, it is ok also.
What's the problem?
Please help me!