strange problem - NoClassDefFoundError

[surekharao]

Hi

I have very strange problem ..

Well .. I am getting java.lang.NoClassDefFoundError: when my bean is calling other bean classes out side of package , If I packaging the importing interface classes in the same jar as the calling bean then working very fine..

Is this any bug type?

Pls suggest me what could be the problem with my bean..

thanks in advance

regards
Surekharao

[adrian.brock]

You have a problem with class visibilty.

The class trying to load the other class is in
a classloader that cannot see the other class.

You'll need to post more details about your packaging.

Regards,
Adrian

[surekharao]

Hi Adrian

Thanks for your reply

sorry for late reply since I was on vacation
well .. my package structure is like below:

UserBean module

com.sms.user.ejb.*; --> calling bean package
UserControlBean--> Bean class
UserControl---> Remote Interface
UserControlHome--> Home Interface

MilageBean module

com.sms.milage.ejb.*; --> other bean package
MilageControlBean--> Bean class
MilageControl---> Remote Interface
MilageControlHome--> Home Interface

Problem :
When I call MilageControlHome in my calling bean(UserControlBean) getting exception java.lang.NoClassDefounderErrorException

The below code is where my bean calling other beans out side of package

MilageControlHome milageHome = (MilageControlHome) EJBUtility.getEJBHome("com/wizit/milage/ejb/MilageControl");
MilageControl milageControl = milageHome.create();


And as I told if I packaged other bean classes in my calling bean package then it didn't give any exception and working very fine


I doubt some thing wrong in classpath, I have checked already my classpath settings and pretty sure there is nothing wrong.

So confusing what is the real problem with this..I am using Jboss -2.4.4 + tomcat -4.0.3 both are standard alone.

Pls refer once this once and help me out.

Thanks in advance

regards
Surekharao

[surekharao]

Hi again

I mistyped the package path in the code where my bean calling other beans out side of package

Context ctx = EJBUtil.getInitialContext();
MilageControlHome milageHome = (MilageControlHome) EJBUtility.getEJBHome(ctx,"com/wizit/milage/ejb/MilageControlHome",MilageControlHome.class);
MilageControl milageControl = milageHome.create();

thanks
Surekharao

[surekharao]

Hi once again !


The below code is the correct code for package path in the code where my bean calling other beans.

Context ctx = EJBUtil.getInitialContext();
MilageControlHome milageHome = (MilageControlHome) EJBUtility.getEJBHome(ctx,"com/sms/milage/ejb/MilageControlHome",MilageControlHome.class);
MilageControl milageControl = milageHome.create();

thanks
Surekharao

[adrian.brock]

You have to do your workaround in jboss-2.4 unless
you deploy the classes statically using the
ClassPathExtension mbean.

There is no unified classloader.

Regards,
Adrian

[surekharao]

Hi Adrian

I am doing work around Jboss-2.4.4, And you said have to deploy the classes statically using the classpath extension .. this i don't understand clearly .. could you plase explain once more..

As I am deploying EJBs in .jar files which are storing $JBOSS_HOME/deploy/, Servelt's and Jsp's are in Tomcat(both are standarad alone)
I am not creatign any types of .EAR, .WAR files

But very strangly in my project some modules are working very fine even that modules beans calls other beans out side of packages and some other modules are not working and getting Exception classDefounderError when the bean calling other beans out side of pakage

Don't understand what could be the problem

thanks & regards
Suree

[adrian.brock]

The classpath extension mbean adds classes to global
classloader space. e.g. all jars in lib/ext are added this
way. If I remember correctly it is in jboss.conf

Making an ear will solve your problem as well.

Regards,
Adrian