Exception : JSP & EJB

Hi,
I'm working on a project but it doens't work perfectly.
It use J2EE, EJB and JSP technology but I'm fresh in this field.
At the moment, sometimes (but not for each utilisation and I don't unterdstand why !) there is a Servlet exception which is :
A Servlet Exception Has Occurred
Exception Report:
javax.servlet.ServletException: Cannot create bean of class util.DocumentationServicesBean
Root Cause:
java.lang.ClassNotFoundException: class util.DocumentationServicesBean : java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
     java.rmi.RemoteException: Client not authorized for this invocation.
     at java.beans.Beans.instantiate(Beans.java:211)
     ... ... ...If someone know the reason of this problem, please let me know.
Thanks !

it's not a servlet exception but when ur jsp/servlet is trying to invoke the EJBs, by any means, like creating a new instance, or just getting the pre-existed data by some finder method etc. etc., some times it doesn't have sufficient rights to do that call. Then ur ejb server throws an error, which ultimately comes to the webserver in the form of ServletException.
java.rmi.RemoteException: Client not authorized for this invocation.
at java.beans.Beans.instantiate(Beans.java:211)check ur deployment descriptor for the different roles and their rights, and different methods and permissions for them.
good luck,

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<h1><b><center>Music Collection Database Using EJB & JSP</center></b></h1>
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%>
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<input TYPE="submit" NAME="View" VALUE="View Tracks">
</form>
</body>
</html>Message was edited by:
chongming

This is the deployment descriptor for the .ear file.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC '-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN' 'http://java.sun.com/dtd/application_1_3.dtd'>
<application>
<display-name>MusicDAOApp</display-name>
<description>Application description</description>
<module>
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</module>
<module>
    <ejb>ejb-jar-ic.jar</ejb>
</module>

</application>
And this is the deployment for the ejb class files:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>
<ejb-jar>
<display-name>MusicEJB</display-name>
<enterprise-beans>
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        <env-entry-value>asg.MusicEJB.MusicDAOCloudscape</env-entry-value>
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      <env-entry>
        <env-entry-name>dbUserName</env-entry-name>
        <env-entry-type>java.lang.String</env-entry-type>
        <env-entry-value>chongming</env-entry-value>
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        <description></description>
        <use-caller-identity></use-caller-identity>
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</enterprise-beans>
</ejb-jar>I can combine the jar and war files into a ear file. deploying is alright without any errors.
However when i run the jsp, it prompt this error:
You Have Encountered an Error
Stack Trace
java.lang.NullPointerException
     at org.apache.jsp.musicGet_jsp._jspService(org.apache.jsp.musicGet_jsp:111)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
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     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
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     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
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     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
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How to i solve the error? I look at he catch results in the command prompt of JBoss , i found that when running, the code will be caught by the exception and display this:int.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
kerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
13:55:21,375 INFO [STDOUT] Unexpected Exception............: EJBException:; nes
ted exception is:
javax.ejb.EJBException: getMusicList: SQLException during DB Connection:
The url cannot be null
13:55:21,375 INFO [STDOUT] java.rmi.ServerException: EJBException:; nested exce
ption is:
javax.ejb.EJBException: getMusicList: SQLException during DB Connection:
The url cannot be null 13:55:21,375 INFO[STDOUT] at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:352)
13:55:21,375 INFO [STDOUT] at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:196)
What can i do to solve the problem? please helpMessage was edited by:
chongming
Message was edited by:
chongming
Message was edited by:
chongming

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http://www.louisiana.edu/~rml7669
"Cata" <[email protected]> wrote:
>
I'm trying to throw an owm exception from an EJB Session to my EJB
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Loader: current-workspace-app.root:0.0.0
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Loader: oracle.toplink:10.1.3
Code-Source: /D:/jdevstudio/toplink/jlib/toplink.jar
Configuration: <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in D:\jdevstudio\j2ee\home\oc4j.jar
The original class instance was also defined in oracle.toplink:10.1.3.
Thanks in Advance:
Need in urgent
Edited by: user636100 on Feb 6, 2009 7:44 AM

You have two copies of toplink.jar visible to the application classloader - D:/MOJ_SVN/Lib/toplink.jar should be removed.
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you can refer
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/d06315a6-e66e-2910-039c-ba8bbbd23702
regards,
ujjwal kumar

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          Hashtable<String, String> props = new Hashtable<String, String>();
          props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
          props.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
          props.put("java.naming.provider.url", "jnp://localhost:1099");
          try {
               ctx = new InitialContext(props);
               CalculatorRemote calc = (CalculatorRemote) ctx.lookup("CalculatorBean/remote");
               System.out.println( "addition   ==   " + calc .add( 10, 20 ));
          } catch (NamingException e) {
               e.printStackTrace();
     when i am try to look up it from servlet following way but getting save error.
i have used following way
1. InitialContext ic = new InitialContext();
Object obj = ic.lookup( "CalculatorBean/remote" );
CalculatorRemote calc= ( CalculatorRemote )PortableRemoteObject.narrow ( obj, CalculatorRemote .class );
it getting following error
java.lang.ClassCastException
at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
Caused by: java.lang.ClassCastException: $Proxy73 cannot be cast to org.omg.CORBA.Object
at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
2. calculator = (CalculatorRemote) ic.lookup("CalculatorBean/remote");
java.lang.ClassCastException: $Proxy73 cannot be cast to forums.business.ForumManager
at forums.web.ForumServlet.init(ForumServlet.java:36)

ClassNotFound Exception accessing EJBs in a cluster

I am experiencing some weird behavior when attempting to access EJBs in a
          Weblogic 5.1.0 cluster. The cluster nodes startup fine, and the EJBs are
          correctly deployed. However, when my test client attempts to access them I
          get the ClassNotFoundException listed below. This same client can access the
          same EJBs deployed in a non-clustered environment without any problems, so
          it's definitely related to my cluster configuration. The problem seems to be
          that the client is not receiving the client-side stub. To confim this, I put
          the stub in the client's classpath, and did NOT get the
          ClassNotFoundException. Has anyone else seen this error?
          BTW, I have compiled the EJB both with and without the <home-is-clusterable>
          flag set to true. I get the same exception either way.
          Thanks for any assistance,
          Jason Donnell
          javax.naming.CommunicationException. Root exception is
          java.lang.ClassNotFoundException: class
          com.landacorp.maxmc.ejb.security.ProviderSecurityBeanHomeImpl_ServiceStub
          previously not found
          at weblogic.rjvm.MsgAbbrev.read(MsgAbbrev.java:184)
          at weblogic.socket.JVMAbbrevSocket.readMsgAbbrevs(JVMAbbrevSocket.java:505)
          at weblogic.rjvm.MsgAbbrevInputStream.prime(MsgAbbrevInputStream.java:134)
          at weblogic.rjvm.RJVMImpl.dispatch(RJVMImpl.java:700)
          at
          weblogic.rjvm.ConnectionManagerClient.handleRJVM(ConnectionManagerClient.jav
          a:34)
          at weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:630)
          at weblogic.socket.JVMAbbrevSocket.dispatch(JVMAbbrevSocket.java:393)
          at weblogic.socket.JVMSocketT3.dispatch(JVMSocketT3.java:355)
          at weblogic.socket.JavaSocketMuxer.processSockets(JavaSocketMuxer.java:247)
          at weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:23)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
          --------------- nested within: ------------------
          weblogic.rmi.UnmarshalException: Unmarshalling return
          - with nested exception:
          [java.lang.ClassNotFoundException: class
          com.landacorp.maxmc.ejb.security.ProviderSecurityBeanHomeImpl_ServiceStub
          previously not found]
          at
          weblogic.jndi.toolkit.BasicWLContext_WLStub.lookup(BasicWLContext_WLStub.jav
          a:256)
          at weblogic.jndi.toolkit.WLContextStub.lookup(WLContextStub.java:545)
          at javax.naming.InitialContext.lookup(InitialContext.java:350)
          at
          com.landacorp.maxmc.ejb.security.ClusterSecurityTest.main(ClusterSecurityTes
          t.java:52)


Just a side note: I setup the cluster using the WebLogic recommended
          directory structure (see
          http://www.weblogic.com/docs51/cluster/setup.html#676105) and I no longer
          get the exception. I'm still interested in hearing, though, if anyone has a
          scheme for setting up the cluster in a directory that isn't directly under
          the weblogic installation directory.
          Jason
          "Jason Donnell" <[email protected]> wrote in message
          news:[email protected]...
          > My current idea is that our directory structure is not properly supported
          by
          > WebLogic. We are NOT putting everything under the weblogic install
          > directory, as the documentation suggests. Instead, it looks something like
          > this (on an NT box):
          >
          > \weblogic_install\<Weblogic 5.1.0 installation here>
          >
          > \our_weblogic\startWeblogicNode1.cmd
          > \our_weblogic\startWeblogicNode2.cmd
          > \our_weblogic\weblogic.properties (cluster-wide)
          > \our_weblogic\public_html\
          > \our_weblogic\our_cluster_name\
          > \our_weblogic\our_cluster_name\all_ejbs\<compiled beans are here>
          > \our_weblogic\our_cluster_name\server_node1\
          > \our_weblogic\our_cluster_name\server_node1\weblogic.properties
          > (server-specific)
          > \our_weblogic\our_cluster_name\server_node2\
          > \our_weblogic\our_cluster_name\server_node2\weblogic.properties
          > (server-specific)
          >
          > So, on the command line in our per-server startup scripts, we set the
          > weblogic.system.home=\our_weblogic,
          weblogic.cluster.name=our_cluster_name,
          > and weblogic.system.name=server_nodeX.
          >
          > Now, I want to emphasize that the server claims to start up just fine. It
          > claims the EJBs have been deployed. However, it is unable to deliver
          classes
          > dynamically, as we found by trying the
          > http://yourweblogic..../classes/some/class/name.class suggestion noted
          > previously.
          >
          > We had a similar directory structure for a single server, and it worked
          just
          > fine. However, in that case we obviously did not have the extra level of
          the
          > \our_cluster_name\ directory. It would seem that in the cluster
          > configuration, we cannot do it this way. I would be VERY interested to
          hear
          > if anyone else has setup a cluster in a directory that is not under the
          > weblogic installation directory.
          >
          > Hopefully this may shed some light on your problem. Feel free to contact
          me
          > if you need any additional information (or if you solve the problem!).
          >
          > Jason Donnell
          > [email protected]
          >
          >
          > "Chad" <[email protected]> wrote in message
          > news:[email protected]...
          > > I am very interested in this thread - I am having the same behavior:
          > >
          > > javax.naming.CommunicationException. Root exception is
          > > java.lang.ClassNotFoundException: class
          > > healthecare.drug.ejb.DrugAlternateBeanHomeImpl_ServiceStub previously
          > > not found
          > > at weblogic.rjvm.MsgAbbrev.read(MsgAbbrev.java:181)
          > > at
          > weblogic.socket.JVMAbbrevSocket.readMsgAbbrevs(JVMAbbrevSocket.java:505)
          > > at
          weblogic.rjvm.MsgAbbrevInputStream.prime(MsgAbbrevInputStream.java:134)
          > > at weblogic.rjvm.RJVMImpl.dispatch(RJVMImpl.java:630)
          > > at
          >
          weblogic.rjvm.ConnectionManagerClient.handleRJVM(ConnectionManagerClient.jav
          > a:34)
          > > at weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:630)
          > > at weblogic.socket.JVMAbbrevSocket.dispatch(JVMAbbrevSocket.java:393)
          > > at weblogic.socket.JVMSocketT3.dispatch(JVMSocketT3.java:355)
          > > at
          > weblogic.socket.JavaSocketMuxer.processSockets(JavaSocketMuxer.java:247)
          > > at
          > weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:23)
          > > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:135)
          > >
          > > --------------- nested within: ------------------
          > > weblogic.rmi.UnmarshalException: Unmarshalling return
          > > - with nested exception:
          > > [java.lang.ClassNotFoundException: class
          > > healthecare.drug.ejb.DrugAlternateBeanHomeImpl_ServiceStub previously
          > > not found]
          > > at
          >
          weblogic.jndi.toolkit.BasicWLContext_WLStub.lookup(BasicWLContext_WLStub.jav
          > a:256)
          > > at weblogic.jndi.toolkit.WLContextStub.lookup(WLContextStub.java:545)
          > > at javax.naming.InitialContext.lookup(InitialContext.java:350)
          > > at healthecare.util.EJBBase.findHomeInterface(EJBBase.java:178)
          > >
          > > One additional bit of information that I can add is that when I
          > > getInitialContext() like this:
          > >
          > > public static Context getInitialContext() throws Exception
          > > {
          > > String providerURL =
          > > "t3://" + CommonUtil.getProperty("ejb.server.name") +
          > > ":" + CommonUtil.getProperty("ejb.server.port");
          > >
          > > Hashtable ht = new Hashtable();
          > > ht.put(Context.INITIAL_CONTEXT_FACTORY,
          > > "weblogic.jndi.WLInitialContextFactory");
          > > ht.put(Context.PROVIDER_URL, providerURL);
          > >
          > > return new InitialContext(ht);
          > > }
          > >
          > > When the "ejb.server.name" property is one server, like "serverName1",
          > > the code works. But when the "ejb.server.name" property is clustered,
          > > like "serverName1, serverName2", the code throws the exception above.
          > >
          > > I'll definitely re-post if I come up with anything.
          > >
          > > thanks,
          > > chad small
          > >
          > > "Jason Donnell" <[email protected]> wrote in message
          > news:<[email protected]>...
          > > > Well, that was a good test. I discovered I am unable to download
          classes
          > > > from the clustered server when pointing my browser at it. Any ideas
          what
          > > > kind of misconfiguration on my part would cause that behavior?
          > > >
          > > > Thanks,
          > > > Jason Donnell
          > > >
          > > > "Dimitri Rakitine" <[email protected]> wrote in message
          > > > news:[email protected]...
          > > > > Try to point your browser to make sure you can actually download
          > classes
          > > > from it
          > > > > (point it to http://yourweblogic..../classes/some/class/name.class)
          > > > >
          > > > > Jason Donnell <[email protected]> wrote:
          > > > > > Yes, I know. That's the behavior that I had always seen before. Do
          > you
          > > > know
          > > > > > of any directory configurations or properties file settings that
          > could
          > > > make
          > > > > > the stub not be downloaded correctly, even though the EJB is
          > deployed on
          > > > the
          > > > > > server?
          > > >
          > > > > > "Tao Xie" <[email protected]> wrote in message
          > > > > > news:[email protected]...
          > > > > >> That's weird, Replica-aware stub should be downloaded to the
          client
          > > > except
          > > > > >> the client is on another Weblogic server.
          > > > > >>
          > > > > >> "Jason Donnell" <[email protected]> wrote in message
          > > > > >> news:[email protected]...
          > > > > >> | I am experiencing some weird behavior when attempting to access
          > EJBs
          > > > in
          > > > a
          > > > > >> | Weblogic 5.1.0 cluster. The cluster nodes startup fine, and the
          > EJBs
          > > > are
          > > > > >> | correctly deployed. However, when my test client attempts to
          > access
          > > > them
          > > > I
          > > > > >> | get the ClassNotFoundException listed below. This same client
          can
          > > > access
          > > > the
          > > > > >> | same EJBs deployed in a non-clustered environment without any
          > > > problems,
          > > > so
          > > > > >> | it's definitely related to my cluster configuration. The
          problem
          > > > seems
          > > > to
          > > > be
          > > > > >> | that the client is not receiving the client-side stub. To
          confim
          > > > this, I
          > > > put
          > > > > >> | the stub in the client's classpath, and did NOT get the
          > > > > >> | ClassNotFoundException. Has anyone else seen this error?
          > > > > >> |
          > > > > >> | BTW, I have compiled the EJB both with and without the
          > > > <home-is-clusterable>
          > > > > >> | flag set to true. I get the same exception either way.
          > > > > >> |
          > > > > >> | Thanks for any assistance,
          > > > > >> | Jason Donnell
          > > > > >> |
          > > > > >> |
          > > > > >> | javax.naming.CommunicationException. Root exception is
          > > > > >> | java.lang.ClassNotFoundException: class
          > > > > >> |
          > > > > >
          > > >
          > com.landacorp.maxmc.ejb.security.ProviderSecurityBeanHomeImpl_ServiceStub
          > > > > >> | previously not found
          > > > > >> |
          > > > > >> | at weblogic.rjvm.MsgAbbrev.read(MsgAbbrev.java:184)
          > > > > >> |
          > > > > >> | at
          > > > > >>
          > > >
          > weblogic.socket.JVMAbbrevSocket.readMsgAbbrevs(JVMAbbrevSocket.java:505)
          > > > > >> |
          > > > > >> | at
          > > >
          weblogic.rjvm.MsgAbbrevInputStream.prime(MsgAbbrevInputStream.java:134)
          > > > > >> |
          > > > > >> | at weblogic.rjvm.RJVMImpl.dispatch(RJVMImpl.java:700)
          > > > > >> |
          > > > > >> | at
          > > > > >> |
          > > > > >>
          > > > > >
          > > >
          >
          weblogic.rjvm.ConnectionManagerClient.handleRJVM(ConnectionManagerClient.jav
          > > > > >> | a:34)
          > > > > >> |
          > > > > >> | at
          > > > weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:630)
          > > > > >> |
          > > > > >> | at
          > > > weblogic.socket.JVMAbbrevSocket.dispatch(JVMAbbrevSocket.java:393)
          > > > > >> |
          > > > > >> | at weblogic.socket.JVMSocketT3.dispatch(JVMSocketT3.java:355)
          > > > > >> |
          > > > > >> | at
          > > > > >>
          > > >
          > weblogic.socket.JavaSocketMuxer.processSockets(JavaSocketMuxer.java:247)
          > > > > >> |
          > > > > >> | at
          > > > > >>
          > > >
          > weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:23)
          > > > > >> |
          > > > > >> | at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
          > > > > >> |
          > > > > >> |
          > > > > >> |
          > > > > >> | --------------- nested within: ------------------
          > > > > >> |
          > > > > >> | weblogic.rmi.UnmarshalException: Unmarshalling return
          > > > > >> | - with nested exception:
          > > > > >> | [java.lang.ClassNotFoundException: class
          > > > > >> |
          > > > > >
          > > >
          > com.landacorp.maxmc.ejb.security.ProviderSecurityBeanHomeImpl_ServiceStub
          > > > > >> | previously not found]
          > > > > >> |
          > > > > >> | at
          > > > > >> |
          > > > > >>
          > > > > >
          > > >
          >
          weblogic.jndi.toolkit.BasicWLContext_WLStub.lookup(BasicWLContext_WLStub.jav
          > > > > >> | a:256)
          > > > > >> |
          > > > > >> | at
          > > > weblogic.jndi.toolkit.WLContextStub.lookup(WLContextStub.java:545)
          > > > > >> |
          > > > > >> | at javax.naming.InitialContext.lookup(InitialContext.java:350)
          > > > > >> |
          > > > > >> | at
          > > > > >> |
          > > > > >>
          > > > > >
          > > >
          >
          com.landacorp.maxmc.ejb.security.ClusterSecurityTest.main(ClusterSecurityTes
          > > > > >> | t.java:52)
          > > > > >> |
          > > > > >> |
          > > > > >> |
          > > > > >> |
          > > > > >>
          > > > > >>
          > > > >
          > > > >
          > > > >
          > > > > --
          > > > > Dimitri
          >
          >
          >
          >
          >
          >

Servlet, JSP, EJB

Hi!
I have some general questions about jsp and servlets. I develop an internetbased portfoliosystem which uses ejb to extract data from an oracle database.
q1: How can I create a controlling servlet for page direction?
q2: How can my jsp file connect to my ejb (session bean)? Can I do it directly or must I go through an AccessBean? (if accessbean, how do I do that?)
Sincirely,
Nicolai
Answers/examples may also be sent to: [email protected]

1 For a controller servlet you can use a servlet controller model, ie the presentation logic is in the JSP pages , which submits request to the servlet which does appropriate processing and then redirects the flow to another JSP.
2. Your JSP file can connect to EJBs directly through the remote handle of the bean obtained by JNDI lookups. However the JSP gets cluttered with the JNDI lookup codes.If the HTML programmer is different from Java programmer then go for accessor beans.

JSP/EJB compilation: don't put .java files in EJB jars!

I was having trouble compiling a JSP that uses an EJB remote interface.
          The Weblogic console printed an error like this:
          Thu Aug 31 14:13:58 PDT 2000:<E> <ServletContext-General> Compilation of
          D:\weblogic\myserver\classfiles\jsp_servlet\_hl
          og.java failed:
          D:\weblogic\myserver\tmp_deployments\ejbjar-6787.jar(hlog/ejb/LogEntry.java):5:
          class LogEntry
          is public, should be declared in a file named LogEntry.java
          (source unavailable)
          1 error
          The fix was not to include source files in my EJB jar. Before I was
          using a simple jar command:
          >jar -cf hlog.jar hlog META-INF
          Which of course included both class and source files in the jar (I
          didn't see the harm in this).
          I changed to:
          >jar -cf hlog.jar hlog\ejb\*.class META-INF
          and the problem went away.
          Thought this might save y'all some time and grief...
          John


In the previous message: "I'd putt String as the return value for all methods"...
all methods = doInserir, doAlterar and doRemover.
    public String doInserir() {
        this.produtoRemote.inserir(this.produto);
        return "sucesso";
    public String doAlterar() {
        this.produtoRemote.alterar(this.produto);
        return "sucesso";
    public String doRemover() {
        this.produtoRemote.remover(this.produto);
        return "sucesso";
    }Just to clarify.
Thanks!

Exception : JSP & EJB

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