1 Reply Latest reply on Aug 4, 2011 5:06 PM by pumuggel

Calling an EJB method in jboss server from another server(Servlet)

vairam_sm Aug 3, 2011 3:51 AM

Hi,

I'm having war in one jboss server and ejb jar in another jboss server. I want to call my ejb from my servlet which is present in another server. How to call it. can any one help me with a working sample and required configurations.

kindly help me for the below issue..

Thanks in advance

I tried with below sample, it throws exception

Hashtable environment = new Hashtable();

environment.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");

environment.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");

environment.put(Context.PROVIDER_URL, "jnp://192.168.10.67:1099"); // remote machine IP

InitialContext context = new InitialContext(environment);

Object lookup = context.lookup("ejbMyTest"); //ejb-name

System.out.println("-->> lookup object successfully");

System.out.println("=====>>" + lookup);

12:46:11,281 ERROR [STDERR] javax.naming.CommunicationException [Root exception

is java.lang.ClassNotFoundException: mytest.ejbMyTestRemoteHome (no security man

ager: RMI class loader disabled)]

12:46:11,282 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(Namin

gContext.java:786)

12:46:11,283 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(Namin

gContext.java:627)

12:46:11,283 ERROR [STDERR] at javax.naming.InitialContext.lookup(InitialCon

text.java:392)

12:46:11,283 ERROR [STDERR] at vq.event.EventSLT.processRequest(EventSLT.jav

a:66)

12:46:11,283 ERROR [STDERR] at vq.event.EventSLT.doGet(EventSLT.java:94)

12:46:11,284 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpSe

rvlet.java:690)

12:46:11,284 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpSe

rvlet.java:803)

12:46:11,284 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterCha

in.internalDoFilter(ApplicationFilterChain.java:290)

12:46:11,284 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterCha

in.doFilter(ApplicationFilterChain.java:206)

12:46:11,285 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilte

r.doFilter(ReplyHeaderFilter.java:96)

12:46:11,285 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterCha

in.internalDoFilter(ApplicationFilterChain.java:235)

12:46:11,285 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterCha

in.doFilter(ApplicationFilterChain.java:206)

12:46:11,285 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve

.invoke(StandardWrapperValve.java:230)

12:46:11,286 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve

.invoke(StandardContextValve.java:175)

12:46:11,286 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssocia

tionValve.invoke(SecurityAssociationValve.java:179)

12:46:11,286 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValv

e.invoke(JaccContextValve.java:84)

12:46:11,286 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.in

voke(StandardHostValve.java:127)

12:46:11,287 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.i

nvoke(ErrorReportValve.java:102)

12:46:11,287 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnec

tionValve.invoke(CachedConnectionValve.java:157)

12:46:11,287 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.

invoke(StandardEngineValve.java:109)

12:46:11,288 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.s

ervice(CoyoteAdapter.java:262)

12:46:11,288 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.proc

ess(Http11Processor.java:844)

12:46:11,288 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http1

1ConnectionHandler.process(Http11Protocol.java:583)

12:46:11,288 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker

.run(JIoEndpoint.java:446)

12:46:11,289 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)

12:46:11,289 ERROR [STDERR] Caused by: java.lang.ClassNotFoundException: mytest.

ejbMyTestRemoteHome (no security manager: RMI class loader disabled)

12:46:11,289 ERROR [STDERR] at sun.rmi.server.LoaderHandler.loadProxyClass(L

oaderHandler.java:535)

12:46:11,289 ERROR [STDERR] at java.rmi.server.RMIClassLoader$2.loadProxyCla

ss(RMIClassLoader.java:628)

12:46:11,290 ERROR [STDERR] at org.jboss.system.JBossRMIClassLoader.loadProx

yClass(JBossRMIClassLoader.java:82)

12:46:11,290 ERROR [STDERR] at java.rmi.server.RMIClassLoader.loadProxyClass

(RMIClassLoader.java:294)

12:46:11,290 ERROR [STDERR] at sun.rmi.server.MarshalInputStream.resolveProx

yClass(MarshalInputStream.java:238)

12:46:11,291 ERROR [STDERR] at java.io.ObjectInputStream.readProxyDesc(Objec

tInputStream.java:1531)

12:46:11,291 ERROR [STDERR] at java.io.ObjectInputStream.readClassDesc(Objec

tInputStream.java:1493)

12:46:11,291 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(

ObjectInputStream.java:1732)

12:46:11,291 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(ObjectI

nputStream.java:1329)

12:46:11,292 ERROR [STDERR] at java.io.ObjectInputStream.readObject(ObjectIn

putStream.java:351)

12:46:11,292 ERROR [STDERR] at java.rmi.MarshalledObject.get(MarshalledObjec

t.java:142)

12:46:11,292 ERROR [STDERR] at org.jnp.interfaces.MarshalledValuePair.get(Ma

rshalledValuePair.java:72)

12:46:11,292 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(Namin

gContext.java:710)

12:46:11,293 ERROR [STDERR] ... 24 more

1. Re: Calling an EJB method in jboss server from another server(Servlet)

pumuggel Aug 4, 2011 5:06 PM (in response to vairam_sm)

Hi there,

this happens due to a missing SecurityManager. RMI will not load the class from your server with your ear installed until you have set a SecurityManager on your JVM on the second server.

But I have no idea how to configure that. In standalone appliction you will typically set the SecurityManager on your own by:

<code>
System.setSecurityManager(new SecurityManager());
</code>

As far as I know there is also a configuration file somewhere in your JVM directory named "java.policy". There you can configure a default behaviour as well.

Hope this will help you.

Regards
Christoph
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