[rules-users] ClassCast Exception loading Packages built using BRMS 4.0.4

[pavi de alwis]

I have a scenario where I'm building the rules packages using the BRMS and
using a standalone drools-core deployment to load these binaries. However,
with the 4.0.4 release the following exception is generated by the
Package.readExternal(…) method during de-serialization.

It's using the BRMS 4.0.4 distribution war and the drools-core.jar
4.0.4available via Maven.

------------------------------------------------------------------------------------------------------------------------------------------------------

java.lang.ClassCastException: org.drools.rule.Package
        at org.drools.rule.Package.readExternal(Package.java:176)
        at com.gbv.platform.rules.drools.impl.RuleRuntimeImpl.init(
RuleRuntimeImpl.java:61)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(
NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod
(AbstractAutowireCapableBeanFactory.java
:1214)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods
(AbstractAutowireCapableBeanFactory.java:1179
)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean
(AbstractAutowireCapableBeanFactory.java:1145)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean
(AbstractAutowireCapableBeanFactory.java:427)
        at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(
AbstractBeanFactory.java:251)
        at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton
(DefaultSingletonBeanRegistry.java:144)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:248)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:160)
        at
org.springframework.osgi.service.exporter.OsgiServiceFactoryBean.afterPropertiesSet
(OsgiServiceFactoryBean.java:271)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods
(AbstractAutowireCapableBeanFactory.java:1175
)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean
(AbstractAutowireCapableBeanFactory.java:1145)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean
(AbstractAutowireCapableBeanFactory.java:427)
        at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(
AbstractBeanFactory.java:251)
        at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton
(DefaultSingletonBeanRegistry.java:144)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:248)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(
AbstractBeanFactory.java:160)
        at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons
(DefaultListableBeanFactory.java:276)
        at
org.springframework.context.support.AbstractApplicationContext.refresh(
AbstractApplicationContext.java:360)
        at
org.springframework.osgi.context.support.AbstractRefreshableOsgiBundleApplicationContext.refresh
(AbstractRefreshableOsgiBundleApplicationCo
ntext.java:170)
        at
org.springframework.osgi.extender.support.ServiceDependentOsgiBundleXmlApplicationContext.refresh
(ServiceDependentOsgiBundleXmlApplicationC
ontext.java:76)
        at
org.springframework.osgi.extender.support.ApplicationContextCreator.run(
ApplicationContextCreator.java:155)
        at java.lang.Thread.run(Thread.java:595)
Error Loading DROOLS Package : org.drools.rule.Package

------------------------------------------------------------------------------------------------------------------------------------------------------

BTW, Running the debugger through it I was able to get the stack trace
below. This occurs on the first call to Package.readExternal(ObjectInput)
line: 176 after returning from ObjectInputStream.readObject() line: 348

------------------------------------------------------------------------------------------------------------------------------------------------------

            Package.readExternal(ObjectInput) line: 176
            ObjectInputStream.readExternalData(Externalizable,
ObjectStreamClass) line: 1755
            ObjectInputStream.readOrdinaryObject(boolean) line:
1717
            ObjectInputStream.readObject0(boolean) line: 1305
            ObjectInputStream.readObject() line: 348
            Package.readExternal(ObjectInput) line: 176
            RuleRuntimeImpl.init() line: 61
            NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line:
not available [native method]
            NativeMethodAccessorImpl.invoke(Object, Object[]) line:
39
            DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25

            Method.invoke(Object, Object...) line: 585

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).invokeCustomInitMethod(String,
Object, String, boolean) line: 1214

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).invokeInitMethods(String,
Object, RootBeanDefinition) line: 1179

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).initializeBean(String,
Object, RootBeanDefinition) line: 1145

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String,
RootBeanDefinition, Object[]) line: 427
            AbstractBeanFactory$1.getObject() line: 251

DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String,
ObjectFactory) line: 144
            DefaultListableBeanFactory(AbstractBeanFactory).getBean(String,
Class, Object[]) line: 248
            DefaultListableBeanFactory(AbstractBeanFactory).getBean(String)
line: 160
            OsgiServiceFactoryBean.afterPropertiesSet() line: 271

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).invokeInitMethods(String,
Object, RootBeanDefinition) line: 1175

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).initializeBean(String,
Object, RootBeanDefinition) line: 1145

DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String,
RootBeanDefinition, Object[]) line: 427
            AbstractBeanFactory$1.getObject() line: 251

DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String,
ObjectFactory) line: 144
            DefaultListableBeanFactory(AbstractBeanFactory).getBean(String,
Class, Object[]) line: 248
            DefaultListableBeanFactory(AbstractBeanFactory).getBean(String)
line: 160
            DefaultListableBeanFactory.preInstantiateSingletons() line:
276

ServiceDependentOsgiBundleXmlApplicationContext(AbstractApplicationContext).refresh()
line: 360

ServiceDependentOsgiBundleXmlApplicationContext(AbstractRefreshableOsgiBundleApplicationContext).refresh()
line: 170
            ServiceDependentOsgiBundleXmlApplicationContext.refresh() line:
76
            ApplicationContextCreator.run() line: 155
            Thread.run() line: 595

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Cheers,
Pavi
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