ClassCastException on hot redeploy.

[camtabor]

Please excuse the cross-post but this thread is in general discussion and I thought a link should be made from here so we can find out if we are doing something wrong or if there is a bug.

It pertains to a ClassCastException being thrown after a hot-redeploy. This is pertinent at least through RC2 in my experience and some report it in the alpha CVS as well.

http://jboss.org/forums/thread.jsp?forum=52&thread=13544

[lsloh]

More details about this.

I noticed that the narrow() on a particular name after hot redeploys fails ONLY if you have accessed the name before the deploy. Other names that were not accessed are can be narrowed without errors.

[liejian]

I have also experienced this problem. I am running win2k with the latest verion of jboss as of this posting. It fails at the narrow() method call. Once I restart jboss, it works again. Has anyone come up with a solution yet?

LJ

[adrian.brock]

Yes.

Remove jndi.properties from your deployment or
don't setup an initial context to go over RMI.

Regards,
Adrian

[katazan]

Adrian,

I don't deploy a jndi.properties with my project, the problem persists with jb 3.0.4.

Can you email me with a fix if there is one?

Thanks,

JC

[adrian.brock]

jboss 3.0.5 contains a workaround for the JVM
caching of interfaces in jdk 1.4

Regards,
Adrian

[gongqin]

I am having the same problem. I have an EJB wrapped as a web service. The EJB looks up another EJB on a remote server. It works fine for the first deployment. After a hot-deploy, I will get this ClassCastException on the narrow method.

I read somewhere that this ClassCastException generally means a class is not found during the narrowing process. Anyone has a solution to this issue yet?

I am running jboss 3.0.5.

Thanks.

[gongqin]

I am having the same problem. I have an EJB wrapped as a web service. The EJB looks up another EJB on a remote server. It works fine for the first deployment. After a hot-deploy, I will get this ClassCastException on the narrow method.

I read somewhere that this ClassCastException generally means a class is not found during the narrowing process. Anyone has a solution to this issue yet?

I am running jboss 3.0.5.

Thanks.

[dan1]

As Adrian was saying, remove the jndi.properties.

If you do something like:

Context jndiContext = getInitialContext();

Object ref = jndiContext.lookup("myObjectHomeRemote");
myObjectHomeRemote home = (myObjectHomeRemote)ref;

I don't think you should have problems.

Dan

[ropeter321]

Please help! I am having this problem have tried the solutions given. I am not deploying a jndi.properties file and I have taken out the narrow and am just trying to cast the reference. I do not have a problem casting RemoteHome objects, only LocalHome objects. Does anyone have a work around for this on the local side?

I am using JBoss 3.0.4 and cannot upgrade to a newer version, but if there is an easy fix in the JBoss code I can change that. Is there?
Below is the small bit of code, if you see a problem please advise.
Thank you in advance.

InitialContext ic = new InitialContext();
Object object = ic.lookup("java:comp/env/ejb/LockEJB");
LockLocalHome home = (LockLocalHome) object;
return home;

[elaineqs]

Hi,

There is a good solution for this problem ??

thanks!