Debug ejb

I want to debug ejb with weblogic. I use eclipse2.1 as IDE. I can run
myEjbTestCase correctly in running mode. I can start Weblogic in debug mode
correctly.
But when I add a breakpoint when in Weblogic in debug mode, I got error:
Attempping to install a breakpoint in the tpye of myEjbTestCase that has
no line number attributes. The breakpoint can not be installed. Class file
must be generated with line number attribute.
Reason:
Absent line number information.
Looking forword to your comment.
Stephen

Hm, this is JVM debugger too slow, not JDeveloper. JDev is just a wrapper for standard debugger.
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Similar Messages

Debug EJB in JDev from JSP page

Hi,
I have read Oracle Note 120139.1 which has helped me debug EJB through JDeveloper. One problem is that it only works with a standard java client, not with a JSP page.
I have tried setting "debug file as" Oracle8i EJB/CORBA and making the debug class oracle.jdeveloper.debugger.ServletMain with the jsp page as the first parameter (similar to how JDeveloper actually kicks off debugging a JSP), however this fails with the following output:
Connecting to database service: sess_iiop://localhost:2481:IAS/etc/debugagent
Attaching Aurora VM agent to JDeveloper: 172.27.1.104, 3539
Aurora VM agent attached successfully.
Cannot run: oracle.jdeveloper.debugger.ServletMain.main()
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java.lang.reflect.InvocationTargetException: java.lang.ArrayIndexOutOfBoundsException: 1
java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[])
void oracle.jdeveloper.debugger.CorbaDebugAgent.main(java.lang.String[])
If I add 4 "dummy" parameters, this error goes away, everything appears to work, except the page does not load in the browser which pops up and the breakpoint is never hit. I suppose this is to be expected as I don't actually know what those 4 extra parameters do as I don't have an API specification for the oracle.jdeveloper.debugger.ServletMain class.
Is it possible to do this (even in an unofficial "workaround fashion?). I would love to know what the additional parameters for the oracle.jdeveloper.debugger.ServletMain class are so I can try running it that way...
Cheers
Nic

By Clear parameter if you mean to remove a request parameter from HttpServletRequest, then you can't. And also, I think this is not an actual solution to what you are trying to solve.
Moreover, you should better post questions related to JSP/Servlet in web tier here .

Debuging EJB in JBoss with JDeveloper

Can anyone tell me tell me what I have to do to debug EJB on a JBoss 3.2.1 server with JDeveloper 9.0.3???

Go to http://localhost:8082 and check the JNDI-View MBean. Check both the java and global namespace. If you are outside of the EJB-Container then you have to use the global namespace. The glocal namespace should have your EJB. Use this path as name to do a JNDI look up. Also be sure you are using narrow.

Debuging ejb's on wls using eclipse

Hi,
I am curently trying to find out ways to debug ejb's on wls. I am hoping to
use eclipse for this. Its has an option to connect to a remote vm via a port.
Can you please tell me how thi can be done.
PS: I am aware that WLS has to be setup so that a port may be open in debug mode.
But all that I know.
Thanks,
Gavin

You should modify the weblogic startup to use the following parameters
(IntelliJ).
-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=
y,suspend=n,address=500.
You might have to do something similar.
"Gavin" <[email protected]> wrote in message
news:3cba93f5$[email protected]..
>
Hi,
I am curently trying to find out ways to debug ejb's on wls. I amhoping to
use eclipse for this. Its has an option to connect to a remote vm via aport.
Can you please tell me how thi can be done.
PS: I am aware that WLS has to be setup so that a port may be open indebug mode.
But all that I know.
Thanks,
Gavin

Debug EJB Application

how am i going to debug my EJB Application
do i need to write a java program with
public static void main () {}
If it is , it will be very hard to test each and every part....
what is the best way to debug....to trace the flow ?
see the log files ??

Christian,
There are should be no difference between WD & EJB debugging.
Set breakpoints in EJB sources, make sure your EJB project is open, invoke Debug with your configuration (Remote debug) and when EJB is invoked then debugger should stop at defined points.
I don't know what goes wrong here, probably execution never reaches points you defined. Then try to set method breakpoints at business methods and EJB lifecycle methods (like ejbCreate) and then execute your code step by step in debugger.
Valery Silaev
SaM Solutions
http://www.sam-solutions.net

How to (can I?) debug EJB called from ABAP?

I have developed a small bean that I am calling remotely from ABAP. I have done the development work in the WebAS 6.40 Sneak Preview NetWeaver Dev. Studio. I cannot figure how (or even if it's possible) to debug this bean.
I have followed the instructions on debugging referred to elsewhere in this forum, but I'm hung up at the point where I'm to create a debug configuration. E.g., what kind of configuration should I specify? (EJB is not one of the choices.) If I try any of those that <i>are </i> available, I always get to a point where it says that it can't connect to the JVM. Well, that's not what I'm trying to do, is it?
Has anybody successfully done such debugging? If so, can you get me past this sticking point?
Thanks...

Hi David,
prerequisite to use debugging is, that the server you want to connect to runs in debug mode:
Open "Window->Show View->Other->J2EE->J2EE Engine". The configurated J2EE engine is displayed. Use the context menu of the "server0" entry to "Enable debugging of process". The server restarts then. If it's (already) running in Debug Mode, this is visible on the right side "Debug Mode = ON".
I suggest to define a "Remote Java Application" configuration like this:
Name: Whatever you like
Project: The project containing the classes to debug.
Connection Type: Standard
Host: Hostname or IP of J2EE server host
Port: 50021
Choose "Apply" and "Debug".
Set breakpoints for example by double-clicking on the frame on the left side of the Java editor (or using the context menu -> Add Breakpoint there). There's a very good documentation about debugger usage in the NWDS online help.
Trigger the remote call from the ABAP system. As soon as a line with a breakpoint is hit, the debugger displays the line and stops the active thread.
Hope that helps.
Regards
Stefan
PS: As soon as you don't need debugging any longer, disable debug mode of the engine, since it slows down everything.

Debugging EJB

Hi
This has taken me the best part of a day and I've gotten nowhere, so I'd be really grateful for some help.
I'm developing my first J2EE (1.3.1) (SE 1.4.2) app from home, in Linux (RH9), and I have a bug I can't solve. I'd like to know how you'd go about debugging this as much as I'd like to know the fix.
Here goes (it's not long, promise). In the bean in question, I have:
try
                    InitialContext ic2 = new InitialContext();
                    Object objRef2 = ic2.lookup("java:comp/env/ejb/TheUserRegistersUI");
// the following line causes the problem
                    UserRegistersUIHome homeUserRegistersUI = (UserRegistersUIHome)PortableRemoteObject.narrow(objRef2, UserRegistersUIHome.class);
     //               iUserRegisters = homeUserRegistersUI.create();
               catch (Exception ex)
                    System.err.println("Exception caught: " + ex.getMessage());
                    System.out.println("Exception caught: " + ex.getMessage());
This is called from a jsp. Only 9235 characters of output are received in the browser (why?, can I set it to provide more?)
The printlns don't appear as I believe they should in the console that's running J2ee -verbose. Why? Where else might they appear? I've had a 'tail error.log' but couldn't see anything triffically helpful. Is there another way to get an output of the error?
Finally, any ideas what I should be checking to actually solve the problem? I've a feeling it's to do with paths, the classes for this bean are in a subdirectory /user but I don't rightly know where I should be stating that .. is it enough to drag the right classes in the deploytool or, well, in the bean's general page in the deploytool I've got everything as user.UserRegistersUI...., is that how you show the classes are in a subdirectory? Have I missed anything else?
Happy new year y'all anyway :-)
J

I see. A logger is software that catches the fallout and presents it to you.
Well, I'm slightly resistant because I can program this stuff OK, but I work from home .. there's no backup for me, no sysad to help. I've recently moved to Linux and I'm groping around it. So I fear a day or two of non-productive farting about trying to get a logger to work, and I could do without it.
Then again, it can take me a good while to debug something blind.
So. Any recommendation for a simple logger? Are they java or do they depend on the OS? Oh, and free/open source of course :-)
Or, if anyone could tell me how to get my printlns to work that would be good too :-)
J

How to remote debugging EJB in JDeveloper?

Here is the procedure I follow
1. configure weblogic startWebLogic.cmd file according to the instruction and start it
2. create a EJB project contains HelloWorld.java, HelloWorldBean.java, HelloWorldHome.java and Client.java, Bean has one method hello(), just return a String
3. in JDeveloper, configure project properties, set RUN/DEBUG to Remote Debugging as the instruction provided by Oracle
4. Then how should I do next?
select Client.java --> Debug --> attach it to the target weblogic
select HelloWorldxxx.java --> Debug --> attach it to the target weblogic
I tried the above and it attached to weblogic, after that, the program suspend there, nothing happen, no debug message, no outcome...
I have a question, the project have no EJB Descripter, How Client.java test program find EJB interface through JNDI?
Thanks
-- CHENLW --
Client.java
==// Copyright (c) 2000 qingniao
==package com.chemuser.ejb.HelloWorld;
==import javax.ejb.*;
==import javax.naming.*;
==import java.rmi.*;
==import java.util.Properties;
==
==/**
== * A Class class.
== * <P>
== * @author chenlw
== */
==public class Client {
==
== public static void main(String[] args) {
== try {
== Properties props = System.getProperties();
==
== Context ctx = new InitialContext(props);
== HelloWorldEJBHome home = (HelloWorldEJBHome)ctx.lookup("HelloHome");
== HelloWorldEJB hello = home.create();
==
== System.out.println(hello.hello());
==
== hello.remove();
== } catch (Exception ex)
== {
== ex.printStackTrace();
== }
==
== }
==}
==
==
null

Programming EJB with JDeveloper is not as easily as JBuilder4.0.
I am regret that I must give up JDevelopper which I like most.
Hope JDev Team will enhance these functions in the future.
Thanks
CHENLW

Debugging EJB : how to reach breakpoint in EJB

I am trying to debug an application. I am unable to reach the breakpoint in my EnitityBean. Where do I find my jar or any other thing that I add to the path so that my thread reaches breakpoint in EJB.

Please find the answer in this HOWTO:
http://technet.oracle.com:89/ubb/Forum2/HTML/006404.html
HOWTO's are archived on the JDeveloper Documentation page:
http://technet.oracle.com/docs/products/jdev/listing.htm (Click on Documentation Tab)
Thanks,
-Roel.

Debugging EJBs called by JWS?

We built a stateless session EJB in Eclipse, deployed it to workshop domain,
and added the jar file to Workshop project's WEB-INF/lib. Our JWS calls this
EJB through an EJB control. Everything runs fine.
The question is: Is there a way to use WLW 7.02 debugger to single-step from
JWS into EJB's source code?
Thanks!
Ray

Hello Ray,
Unfortunately there is no mechanism by which you can debug into the EJB code
in WebLogic Workshop 7.0
Thanks
Raj Alagumalai
WebLogic Workshop Support
"Ray Yan" <[email protected]> wrote in message
news:3ecec8fa$[email protected]..
We built a stateless session EJB in Eclipse, deployed it to workshopdomain,
and added the jar file to Workshop project's WEB-INF/lib. Our JWS callsthis
EJB through an EJB control. Everything runs fine.
The question is: Is there a way to use WLW 7.02 debugger to single-stepfrom
JWS into EJB's source code?
Thanks!
Ray

Debugging EJBs (CMP2.0).....

Hello.. i am using CMP2.0 and entity beans.
When i try to deploy the beans i get the following error.
Compilation failed.
at com.sun.ejb.codegen.GeneratorDriver.compileClasses(GeneratorDriver.java:319)
at com.sun.ejb.codegen.GeneratorDriver.preDeploy(GeneratorDriver.java:695)
at com.sun.enterprise.tools.deployment.backend.JarInstallerImpl.deployEjbs(JarInstallerImpl.java:705)
at com.sun.enterprise.tools.deployment.backend.JarInstallerImpl.deployApplication(JarInstallerImpl.java:209)
at org.omg.stub.com.sun.enterprise.tools.deployment.backend._JarInstallerImpl_Tie._invoke(Unknown Source)
at com.sun.corba.ee.internal.corba.ServerDelegate.dispatch(ServerDelegate.java:355)
at com.sun.corba.ee.internal.iiop.ORB.process(ORB.java:273)
at com.sun.corba.ee.internal.iiop.RequestProcessor.process(RequestProcessor.java:84)
at com.sun.corba.ee.internal.orbutil.ThreadPool$PooledThread.run(ThreadPool.java:99)
However, the verifier passes all the tests succesfully. So, i am kind of lost here, I just know that there is an error but i dont know where to find it.
If someone knows what is the cause of this error please let me know. Besides, i would like to get some suggestion on debugging strategies for the EJBs. In cases like this one, how do I know what the error is?. Since i have to deploy the whole app, it is very difficult to detect runtime errors....
Thanks in advance
Otto.

i've gotten similar errors before. if you look in your J2EE_HOME\logs\YOUR_MACHINE_NAME\j2ee\j2ee\system.err file, you'll find more detailed error messages that should help you to figure out what's wrong. for instance, in my case i was able to determine that i had prototyped a certain EJB-required method incorrectly, or forgotten to put a certain method in my entity bean implementation class, that i had i had declared in the interface class ... so take a look in there, and see what you find.

How to test and debug EJB from a JUnit TestCase?

It is possible to access an EJB from a JUnit TestCase? I have seen that in this case the embedded OC4J is not started automatically. Is it possible to start it programatically?
Thanks in advance
Cs.

For the first part, I googled for "JUnit" and "EJB" with many hits like
http://www.devx.com/Java/Article/28119
and
http://www.onjava.com/pub/a/onjava/2003/02/05/automate_ejb.html
The embedded server can be started by running an EJB from the IDE before performing the tests. If you start it programmatically (e.g. issuing the startup command) then it will be launched as a stand alone OC4J container.
EJB 3.0 will make things easier to test in the near future
Frank

Debugging EJBs

When I try to run weblogic (on a Solaris box) with debug enabled I get the
following error:
Error [4] in accept() call!
err:: Interrupted system call
Socket transport failed to init.
dt_socket transport error; accept failed, rc = -1
I've tried the same debug switches on a 'hello world' test class and it
works fine.
Here are the java debug command line parameters I'm using to start weblogic:
-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=
y,suspend=n,address=5555
I'm using jdk 1.2.2, weblogic 5.1 service pack 4 on solaris 2.6
Any suggestions?

Hi,
Check the server trace files at <oraclehome>\admin\<yourDb>\udump\
With JDev 3.1 you'll be able to debug Java code running in 8.1.6
Regards,
Arun

Way to Debug EJB Insert (Database) Errors?

Howdy y'all,
Would anyone happen to know of any trick to get the details of a transaction.commit() failure to print in the logs?
Specifically my problem is, Oracle reports there is a column which fails because the data being stuffed into it is too large - although the data checks out - I checked the lengths of the fields and the widths of the columns and printed the data to the logs so I can manually sift through and ensure none of it exceeds any maximums. It does not seem that any of the data is in violation of any size limits.
It would be excellent if there was a way to determine which column exactly failed - but I'm going to venture a guess that one is limited by what the host DB provides?
Many Thanks,
Alexandra

For some reason, the freeware database tools we use sometimes show column sizes incorrectly. Where I thought I had a varchar2(4000), I really only had varchar2(1024) - which was only made apparent to me when I went to our DBA out of sheer frustration, and he viewed the schema with his nice Oracle schema browser tool, which showed the correct column allocations.
So, of course the value of WC 1145 would be too wide for the column! (Having a way to determine the offending column at run time would have really reduced the debug time)
--Alexandra

Do EJB's have to be debugged remotely?

Do EJB's have to be debugged remotely?

You can debug EJBs locally in the IDE as well.
Place breakpoint in the bean class of the EJB
Select EJB node in the project.
Right mouse and Select Debug.
Right mouse on EJB and generate sample client.
Choose Embedded OC4J Server option.
Modify client as appropriate.
Place breakpoint in the client code.
Right mouse on the client and select debug.
Now you can step into the client and server (EJB) code.
Note: You can also debug EJBs deployed on remote appservers.
raghu
JDev Team

Debug ejb

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