0002556: jmx invocation with classloader

Viewing Issue Simple Details [ Jump to Notes ]

[ View Advanced ] [ Issue History ] [ Print ]

Category

Severity

Reproducibility

Date Submitted

Last Update

0002556

[Resin]

minor

always

03-26-08 13:40

03-27-08 08:58

Reporter

ferg

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Status

closed

Product Version

3.1.5

Summary

0002556: jmx invocation with classloader

Description

(rep by Karl Goldstein)

have a Spring-managed MBean that I would like to register with
the resin MBeanServer (the one bound to "java:comp/env/jmx/
MBeanServer" in JNDI). This MBean defines some operations to query
and update some metadata in the database, using Hibernate/JPA.

The MBean registers fine and I can see it in jconsole in the right
place. However, when I tried to invoke an operation, I received an
error. The underlying exception was this:

interface org.hibernate.jdbc.ConnectionWrapper is not visible from
class loader

Loading the Hibernate and Spring jars in the parent classloader
solved the immediate problem:

<resin xmlns="http://caucho.com/ns/resin" [^]
      xmlns:resin="http://caucho.com/ns/resin/core"> [^]

<class-loader>
   <tree-loader path="lib"/>
   <tree-loader path="/path/to/my/webapp/WEB-INF/lib/"/>
</class-loader>
...

However, I'd rather not do this because I want to retain the
ability to deploy multiple webapps with different versions of
dependencies like Spring and Hibernate (mainly so we can deploy a
new version of our webapp and leave the old one untouched so we
have a fallback).

Is there some way to make it so that mbeans are registered and
invoked in the classloader of the webapp that registered them?

Additional Information

Attached Files

C:\apps\resin-3.1.1\conf\bug.conf [^] (2,085 bytes) 03-27-08 08:46

Relationships

Notes
(0002922) karl 03-27-08 08:48	In case it's helpful, I've uploaded the resin config I've been using for the webapp. I am registering the MBean with the object name resin:type=WebApp,Host=default,name=/1.0,group=SiteStatus (SiteStatus is an identifier for the MBean, and the webapp is mounted under /1.0 of the default host)

(0002923) ferg 03-27-08 08:58	server/2152 The configuration doesn't really matter, since it's a fairly straightforward issue. We just didn't change the classloader context when calling the JMX bean. Resin's admin documentation is at http://caucho.com/doc/resin-admin.xtp [^]

Issue History
Date Modified	Username	Field	Change
03-26-08 13:40	ferg	New Issue
03-27-08 08:46	karl	File Added: C:\apps\resin-3.1.1\conf\bug.conf
03-27-08 08:48	karl	Note Added: 0002922
03-27-08 08:58	ferg	Note Added: 0002923
03-27-08 08:58	ferg	Assigned To	=> ferg
03-27-08 08:58	ferg	Status	new => closed
03-27-08 08:58	ferg	Resolution	open => fixed
03-27-08 08:58	ferg	Fixed in Version	=> 3.1.6

Mantis 1.0.0rc3[^]

32 total queries executed.
27 unique queries executed.