5:03 a.m.
BPM process action class loading issue
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Key: JBPM-2428
URL: https://jira.jboss.org/jira/browse/JBPM-2428
Project: JBoss jBPM
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Runtime Engine
Affects Versions: jBPM 3.2.5.SP5
Environment: SOA-P 4.3 CP01
JBoss server config = PRODUCTION
Reporter: Marek Baluch
Attachments: jbpm_classloader_anomaly.tar.gz
Class loader which loaded a class instance which is stored in the process variable is
different then the classloader that loaded the same class in ActionHandler. This issue
will occure only if the process is undeployed after one or more runs and redeployed
without restarting the server. Even deleting process instances using the JBPM Console
didn't help.
Steps to reproduce (use the quickstart in the attachment)
============================================
ant deploy
ant deployProcess
ant startProcess
ant undeploy
start the quickstart
ant deploy
ant deployProcess
ant startProcess
A simple restart of the server after the first undeploy fixes the problem and the
exception won't be reproduced.
First run output
===========
2009-07-15 11:40:26,407 INFO [STDOUT] ********** CandidateIntakeAction - Candidate object
populated **********
2009-07-15 11:40:26,407 INFO [STDOUT] Candidate name = Fidel
2009-07-15 11:40:26,407 INFO [STDOUT] Candidate surname = Castro
2009-07-15 11:40:26,407 INFO [STDOUT] Candidate email = fidel.castro(a)gmail.com
2009-07-15 11:40:26,407 INFO [STDOUT]
************************************************************************
2009-07-15 11:40:26,515 INFO [STDOUT] ********** SimpleBPMActionHandler **********
2009-07-15 11:40:26,515 INFO [STDOUT] Object loaded with classloader:
org.jboss.mx.loading.UnifiedClassLoader3@1769b56{
url=file:/home/mbaluch/work/build/jboss-soa-p.4.3.0.GA_CP01_CR7/jboss-as/server/production/deploy/Quickstart_jbpm_classloader_anomaly.esb/
,addedOrder=60}
2009-07-15 11:40:26,516 INFO [STDOUT] Given classloader for class Candidate:
org.jboss.mx.loading.UnifiedClassLoader3@1769b56{
url=file:/home/mbaluch/work/build/jboss-soa-p.4.3.0.GA_CP01_CR7/jboss-as/server/production/deploy/Quickstart_jbpm_classloader_anomaly.esb/
,addedOrder=60}
2009-07-15 11:40:26,516 INFO [STDOUT] ********************************************
Second run output
==============
2009-07-15 11:40:46,849 INFO [STDOUT] ********** CandidateIntakeAction - Candidate object
populated **********
2009-07-15 11:40:46,849 INFO [STDOUT] Candidate name = Fidel
2009-07-15 11:40:46,849 INFO [STDOUT] Candidate surname = Castro
2009-07-15 11:40:46,849 INFO [STDOUT] Candidate email = fidel.castro(a)gmail.com
2009-07-15 11:40:46,849 INFO [STDOUT]
************************************************************************
2009-07-15 11:40:47,041 INFO [STDOUT] ********** SimpleBPMActionHandler **********
2009-07-15 11:40:47,041 INFO [STDOUT] Object loaded with classloader:
org.jboss.mx.loading.UnifiedClassLoader3@1769b56{ url=null ,addedOrder=60}
2009-07-15 11:40:47,041 INFO [STDOUT] Given classloader for class Candidate:
org.jboss.mx.loading.UnifiedClassLoader3@1300751{
url=file:/home/mbaluch/work/build/jboss-soa-p.4.3.0.GA_CP01_CR7/jboss-as/server/production/deploy/Quickstart_jbpm_classloader_anomaly.esb/
,addedOrder=61}
2009-07-15 11:40:47,041 INFO [STDOUT] !!! Classloader conflict between
ClassName.class.getClassLoader() and instanceOfClassName.getClass().getClassLoader() !!!
2009-07-15 11:40:47,041 INFO [STDOUT] !!! Process will throw a ClassCastException !!!
2009-07-15 11:40:47,042 ERROR [org.jbpm.graph.def.GraphElement] action threw exception:
org.jboss.soa.esb.xml2pojo.object.Candidate
java.lang.ClassCastException: org.jboss.soa.esb.xml2pojo.object.Candidate
<Stack-Trace> ...
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