Strange ClassNotFoundException using ejb

I have an ejb deployed as part of an ear. the ejb has a manifest.mf which allows
it to access helper jars and classes in the ear. I see the below error message
when the bean tries to use the ReportDirectoryBase class. That class is accessable
to the ejb classpath. It's in the ear and the manifest.mf directs the ejb to
that class.
The ReportDirectoryBase class is also used by our webapp, and we see a similar
error message when accessing this class through the web app. Any insights would
be most helpfull.
####<Oct 21, 2003 8:01:38 AM EDT> <Error> <Unknown> <mlybarger> <myserver> <ExecuteThread:
'11' for queue: 'default'> <> <> <000000> <EventSubmitBean.submit() - error: java.rmi.UnmarshalException:
error unmarshalling arguments; nested exception is:
 java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase:
This error could indicate that a component was deployed on a cluster member but
not other members of that cluster. Make sure that any component deployed on a
server that is part of a cluster is also deployed on all other members of that
cluster
Start server side stack trace:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
 java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase:
This error could indicate that a component was deployed on a cluster member but
not other members of that cluster. Make sure that any component deployed on a
server that is part of a cluster is also deployed on all other members of that
cluster
java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase: This
error could indicate that a component was deployed on a cluster member but not
other members of that cluster. Make sure that any component deployed on a server
that is part of a cluster is also deployed on all other members of that cluster
 at weblogic.j2ee.ApplicationManager.loadClass(ApplicationManager.java:162)
 at weblogic.rjvm.MsgAbbrevInputStream.readClassDescriptor(MsgAbbrevInputStream.java:211)
 at weblogic.common.internal.ChunkedObjectInputStream$NestedObjectInputStream.readClassDescriptor(ChunkedObjectInputStream.java:300)
 at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:906)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
 at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1186)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
 at java.util.ArrayList.readObject(ArrayList.java:531)
 at java.lang.reflect.Method.invoke(Native Method)
 at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2214)

got it figured out kinda. We were passing a ReportDocument object to an ejb.
This object doesn't have a ReportDirectoryBase instance, but it does have a List
of ReportDirectoryBase objects, The ejb that is using the ReportDocument works
fine when it recieves a ReportDocument that doesn't contain a list of ReportDirectoryBase
objects, but craps out when it has to serialize a ReportDocument object that
contains a list of ReportDirectoryBase objects. The ejb does not have the ReportDirectoryBase
class in it (since it doesn't directly use that class). I suspect that weblogic
has to identify the classes it's serializing on the ejb side.
Note, this is not a problem when running the ejb, and the webapp all under the
same weblogic instance (one server for webapp and ejb's for development).
"Mark" <[email protected]> wrote:
>
I have an ejb deployed as part of an ear. the ejb has a manifest.mf
which allows
it to access helper jars and classes in the ear. I see the below error
message
when the bean tries to use the ReportDirectoryBase class. That class
is accessable
to the ejb classpath. It's in the ear and the manifest.mf directs the
ejb to
that class.
The ReportDirectoryBase class is also used by our webapp, and we see
a similar
error message when accessing this class through the web app. Any insights
would
be most helpfull.
####<Oct 21, 2003 8:01:38 AM EDT> <Error> <Unknown> <mlybarger> <myserver>
<ExecuteThread:
'11' for queue: 'default'> <> <> <000000> <EventSubmitBean.submit() -
error: java.rmi.UnmarshalException:
error unmarshalling arguments; nested exception is:
 java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase:
This error could indicate that a component was deployed on a cluster
member but
not other members of that cluster. Make sure that any component deployed
on a
server that is part of a cluster is also deployed on all other members
of that
cluster
Start server side stack trace:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception
is:
 java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase:
This error could indicate that a component was deployed on a cluster
member but
not other members of that cluster. Make sure that any component deployed
on a
server that is part of a cluster is also deployed on all other members
of that
cluster
java.lang.ClassNotFoundException: com.cbc.isac.toolkit.ReportDirectoryBase:
This
error could indicate that a component was deployed on a cluster member
but not
other members of that cluster. Make sure that any component deployed
on a server
that is part of a cluster is also deployed on all other members of that
cluster
 at weblogic.j2ee.ApplicationManager.loadClass(ApplicationManager.java:162)
 at weblogic.rjvm.MsgAbbrevInputStream.readClassDescriptor(MsgAbbrevInputStream.java:211)
 at weblogic.common.internal.ChunkedObjectInputStream$NestedObjectInputStream.readClassDescriptor(ChunkedObjectInputStream.java:300)
 at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:906)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
 at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1186)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
 at java.util.ArrayList.readObject(ArrayList.java:531)
 at java.lang.reflect.Method.invoke(Native Method)
 at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2214)

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Hi
I am just a starter on WLPortal.
I have created a barebone Application from scratch. I have synchronized it properly
from EBCC to WLP. But When I am trying to access the home page of my application,
I am getting from stack trace -
<Nov 6, 2002 5:37:59 PM IST> <Error> <PortalAppflow> <Could not lookup PortalManagerHome
in the JNDI tree using EJB reference java:comp/env/ejb/PortalManager.
javax.naming.NameNotFoundException: Unable to resolve comp/env/ejb/PortalManager
Resolved: 'comp/env' Unresolved:'ejb' ; remaining name 'PortalManager'
at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:802)
at weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:209)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:173)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)
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at weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:124)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at com.bea.p13n.util.JndiHelper.lookupNarrow(JndiHelper.java:96)
at com.bea.portal.appflow.PortalAppflowHelper.<clinit>(PortalAppflowHelper.java:64)
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at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:242)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:215)
at weblogic.servlet.jsp.PageContextImpl.forward(PageContextImpl.java:112)
at jsp_servlet.__index._jspService(__index.java:92)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:304)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2459)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2039)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
>
<Nov 6, 2002 5:37:59 PM IST> <Error> <HTTP> <[WebAppServletContext(19695286,FirstWebApp,/FirstWebApp)]
Servlet failed with Exception
java.lang.NullPointerException:
at com.bea.portal.appflow.PortalAppflowHelper.createPortalManager(PortalAppflowHelper.java:82)
at com.bea.portal.appflow.servlets.internal.PortalWebflowServlet.setupPortalRequest(PortalWebflowServlet.java:187)
at com.bea.portal.appflow.servlets.internal.PortalWebflowServlet.doGet(PortalWebflowServlet.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:215)
at weblogic.servlet.jsp.PageContextImpl.forward(PageContextImpl.java:112)
at jsp_servlet.__index._jspService(__index.java:92)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:304)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2459)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2039)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
When I decompiled the class PortalAppflowHelper, I found a static block in it,
which was as under-
static
debug = Debug.getInstance(com.bea.portal.appflow.PortalAppflowHelper.class);
try
if(debug.ON)
debug.out("Looking up PortalManagerHome using EJB reference java:comp/env/ejb/PortalManager");
portalManagerHome = (PortalManagerHome)JndiHelper.lookupNarrow("java:comp/env/ejb/PortalManager",
com.bea.portal.manager.ejb.PortalManagerHome.class);
if(debug.ON)
debug.out("Successfully retrieved PortalManagerHome " + portalManagerHome);
catch(Exception e)
PortalAppflowLogger.errorFindingPortalManagerHome("java:comp/env/ejb/PortalManager",
e);
I have checked the PortalManager's JNDI name on WLConsole. Its ${APPNAME}.BEA_portal.PortalManager.
Should I change it?
When I tried to change it, I started getting other weird errors.
Thanks
Neeraj Hans

Neeraj -
The Portal framework code (including PortalAppflowHelper) uses ejb
references to find the PortalManager (and other EJBs) from servlets and
taglibs; that is what is signified by the java:comp/env/... name.
Since you built your webapp from scratch (instead of using the portal
wizard), you will need to make sure the you have the appropriate
<ejb-ref> entries in your web.xml, and the corresponding
<ejb-reference-description> entries in your weblogic.xml. By default,
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- ejb/UserManager
- ejb/GroupManager
- ejb/PipelineExecutor
- ejb/EventService
See either the resulting webapp from using the portal wizard or
BEA_HOME/weblogic700/samples/portal/sampleportalDomain/beaApps/sampleportal/sampleportal/WEB-INF
for example syntax.
Greg
Neeraj Hans wrote:
Hi
I am just a starter on WLPortal.
I have created a barebone Application from scratch. I have
synchronized it properly
from EBCC to WLP. But When I am trying to access the home page of my
application,
I am getting from stack trace -
<Nov 6, 2002 5:37:59 PM IST> <Error> <PortalAppflow> <Could not lookup
PortalManagerHome
in the JNDI tree using EJB reference java:comp/env/ejb/PortalManager.
javax.naming.NameNotFoundException: Unable to resolve
comp/env/ejb/PortalManager
Resolved: 'comp/env' Unresolved:'ejb' ; remaining name 'PortalManager'
at <stack trace lines snipped>
When I decompiled the class PortalAppflowHelper, I found a static
block in it,
which was as under-
static
debug =
Debug.getInstance(com.bea.portal.appflow.PortalAppflowHelper.class);
try
if(debug.ON)
debug.out("Looking up PortalManagerHome using EJB
reference java:comp/env/ejb/PortalManager");
portalManagerHome =
(PortalManagerHome)JndiHelper.lookupNarrow("java:comp/env/ejb/PortalManager",
com.bea.portal.manager.ejb.PortalManagerHome.class);
if(debug.ON)
debug.out("Successfully retrieved PortalManagerHome "
+ portalManagerHome);
catch(Exception e)
PortalAppflowLogger.errorFindingPortalManagerHome("java:comp/env/ejb/PortalManager",
e);
I have checked the PortalManager's JNDI name on WLConsole. Its
${APPNAME}.BEA_portal.PortalManager.
Should I change it?
When I tried to change it, I started getting other weird errors.
Thanks
Neeraj Hans

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[Jul 1, 2009 11:59:25 AM] Starting application : test_ws
[Jul 1, 2009 11:59:25 AM] Initializing ClassLoader(s)
[Jul 1, 2009 11:59:25 AM] Initializing EJB container
[Jul 1, 2009 11:59:25 AM] Loading connector(s)
[Jul 1, 2009 11:59:26 AM] Starting up resource adapters
[Jul 1, 2009 11:59:26 AM] Processing EJB module: ejb30ws-ejb.jar
[Jul 1, 2009 11:59:26 AM] application : test_ws is in failed state
[Jul 1, 2009 11:59:26 AM] Operation failed with error: java.lang.NoClassDefFoundError
the opmn log reveals the same error, but no more detail.
any ideas???
/stuck

I am having exactly the same issue. Was this issue resolved? If so, please share the resolution and if not can someone please suggest what could be wrong.
Thanks

Performing database operations using EJB 3.0

I need to create a session bean that will perform operations on backend database. I am new to EJB 3.0 and need a gentle guidance to the solution
This is what I believe is suppose to be done
1. Create stateless bean interface marking operations.
2. Create bean implementation for above
3. Init stage will require me to connect to the Oracle database. Now am confused how will it get the connection details? Is there a way to extract the url username and password using resource bendle which can be accessed from within bean implementation?
4. Bean method will perform update, read oprations
5. Predestroy will close the connection
6. A client will simply call this ejb with some input parameter(s)
Please let me know if am doing anything wrong here

If you use EJB technology for which it is designed, the container (server) will manage the transaction (and also the connections to the database) for you, so no creation or cleanup of connections on your part. I advise you to read into JPA which is designed to be used in conjunction with EJB tech. The books Enterprise Javabeans 3.0 and Pro EJB 3: the Java Persistence API may help you a lot.

Problem with "package-info.java" using EJB 3.0 and OC4J

Hi all.
I already posted this question on JDeveloper forum, but didn't get any answer,
so I'll try posting here.
Anyway, I'm new both to JDeveloper and J2EE,
so I'm trying out examples for EJB 3.0, and I got stuck at "Use Security Annotations with EJB 3.0"
(http://www.oracle.com/technology/tech/java/oc4j/ejb3/howtos-ejb3/howtoejb30security/doc/how-to-ejb30-security-ejb.html).
Example code is working perfectly, if one builds it using Ant, but I'm importing all examples into JDeveloper (or at least I'm trying to :))
JDeveloper can't build file "package-info.java" containing following code:
@javax.annotation.security.SecurityRoles(roleNames={"superuser", "user"})
package oracle.ejb30;I'm getting following output in "Compiler - Log" window:
Error(2,1): 'class', 'interface', or 'enum' expected.
Help much appreciated...
platform used:
Windows XP SP2
JDeveloper Studio (Version 10.1.3, Build 3412)
JDK 1.5_06
OC4J 10.1.3 developer preview 4 (standalone version)

Since you're using EJBs, you can use JTA and can skip the getTransaction() calls. If you want to use getTransaction().begin() and commit(), then make sure that your EntityManager is resource-local. The configuration for this is in persistence.xml. Set a transaction-type of RESOURCE_LOCAL rather than JTA.

How to start and finish a transaction using EJB 3.0 in JDeveloper

Hello everybody!
Does anybody can explain how to start and finish a transaction using EJB 3.0. I need to start a transaction insert some information in some tables and if everything was fine commit the information.
I put the annotation @TransactionManagement(TransactionManagementType.BEAN) in my session bean and @Resource SessionContext ejbContext; but I don't what anything else I have to do.
Any help will be appreciate.

I tryied to use in the client the statement EntityTransaction transaction = myBean.getTransact(); but I receive the EJBException: Cannot use resource level transactions with a container managed EntityManager
I just need to start a transaction something like this: transaction.begin(); and finish the transaction, something like this: transaction.commit();
Does anybody can help?

Using local session bean interface from web container using EJB 3.0

Hi,
How can you use a local session bean interface from Java (rather than data controls) in a web container using EJB 3.0?
I can use a remote interface by looking up InitialContext, but I can't find a local interface this way (even from another session EJB). I can use a local interface from an EJB using annotation "EJB", but as I understand, this is not available in the web container.
If I try to add an ejb-jar.xml file, these seems to mess up by project...
Hope you can help.
Roger

The portable way to retrieve an EJB reference in Java EE is to either inject it or look it up via the
component's private naming environment. The simplest way is :
@EJB
private DocumentManager dm;
The global JNDI name is only used as an implementation specific way to uniquely assign an
identifier to a specific Remote EJB. It's best for this not to appear directly in the source code.
There's more on global JNDI names in our EJB FAQ :
https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html
The alternative to annotations is to use an ejb-ref to declare the ejb dependency. The ejb-ref
is declared in the standard deployment descriptor corresponding to the component doing the
lookup. Each ejb-ref has an ejb-ref-name, e.g. <ejb-ref-name>DM_ref</ejb-ref-name>
The code looks up the ejb-ref-name relative to the java:comp/env namespace to retrieve the
EJB reference.
DocumentManager dm = (DocumentManager)
new InitialContext().lookup("java:comp/env/DM_ref");

How to load data in plain-text file into database by using EJB?

Hi,
We need to develop an on-line application which requires us to load input data
from a selected plain-text file on the Web server (iplanet server) into the backend
oracle database. How could I use EJB to make it happen? it seems like using Entity
EJB is not feasible.
Really appreciate your help!
Corona

Hi Corona,
"Corona Fang" <[email protected]> wrote in message
news:3f3b0ea3$[email protected]..
We need to develop an on-line application which requires us to load inputdata
from a selected plain-text file on the Web server (iplanet server) intothe backend
oracle database. How could I use EJB to make it happen? it seems likeusing Entity
EJB is not feasible.If you are talking about loading thousands of records,
the preferable way is using plain JDBC calls utilizing
batch methods.
Regards,
Slava Imeshev

Strange ClassNotFoundException using ejb

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