[JBoss JIRA] (DROOLS-396) Caused by: java.lang.NoClassDefFoundError: org/drools/event/DebugProcessEventListener
8:09 a.m.
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https://issues.jboss.org/browse/DROOLS-396?page=com.atlassian.jira.plugin...
]
Kenny Wottrich edited comment on DROOLS-396 at 8/2/16 9:08 AM:
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-I had the same issue, and determined that it was caused by attempting to use Spring to
inject a rules engine into a class that had other dependencies autowired in (as in, the
rules engine was not autowired in, but all of the other dependencies were). The fix for
me was to put all dependencies into the XML config, and not mix and match autowire and
XML-
EDIT: Never mind. This fixed the issue for one bean, but did NOT fix the issue for
another bean. I'm still searching for a solution.
was (Author: kenny.wottrich):
I had the same issue, and determined that it was caused by attempting to use Spring to
inject a rules engine into a class that had other dependencies autowired in -- as in, the
rules engine was not autowired in, but all of the other dependencies were. In our Spring
XML config, I had:
<bean id="myBean" class="com.example.myBeanImpl"
scope="request">
<aop:scoped-proxy />
<property name="rulesEngine" ref="rulesEngineDef" />
</bean>
I think the {{<aop:scoped-proxy />}} was causing it to try to set dependencies with
different scopes.
*The fix for me was to put all dependencies into the XML config, and not mix and match
autowire and XML*:
<bean id="myBean" class="com.example.myBeanImpl"
scope="request">
<aop:scoped-proxy />
<property name="otherDependency" ref="otherDependencyDef" />
...
<property name="rulesEngine" ref="rulesEngineDef" />
</bean>
Caused by: java.lang.NoClassDefFoundError:
org/drools/event/DebugProcessEventListener
-------------------------------------------------------------------------------------
Key: DROOLS-396
URL: https://issues.jboss.org/browse/DROOLS-396
Project: Drools
Issue Type: Bug
Affects Versions: 6.0.0.Final
Reporter: leonardo lizana
Assignee: Petr Široký
Priority: Critical
Attachments: noclassdeffound.zip
I'm trying to testing latest version of drools 6.0.1.Final version and i have the
issue of " java.lang.NoClassDefFoundError:
org/drools/event/DebugProcessEventListener" . However, i can see class is now on the
the following path "org.drools.core.event.DebugProcessEventListener" and why the
context is seeking in org/drools/event/DebugProcessEventListener. instead of
"org.drools.core.event.DebugProcessEventListener"
is there anything that i'm doing bad?
* with drools 5.5 everything is working OK.
Here is my pom.xml
--------------------------
<dependency>
<groupId>org.drools</groupId>
<artifactId>knowledge-api</artifactId>
<version>${drools.version}</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>${drools.version}</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>${drools.version}</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-spring</artifactId>
<version>5.5.0.Final</version>
</dependency>
here is the log error:
----------------------------
Caused by: java.lang.NoClassDefFoundError: org/drools/event/DebugProcessEventListener
at
org.drools.container.spring.namespace.KnowledgeSessionDefinitionParser.parseInternal(KnowledgeSessionDefinitionParser.java:115)
at
org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:59)
at
org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1338)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1328)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
Here is the contex-drools.xml
-------------------------------------
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:drools="http://drools.org/schema/drools-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://drools.org/schema/drools-spring
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-containe...
default-autowire="byName">
<drools:resource id="rulesEnergyUsage" type="DRL"
source="classpath:com/aepenergy/b2b/miscpull/rules/rulesEnergyUsage.drl"/>
<drools:kbase id="kBaseEnergyUsage">
<drools:resources>
<drools:resource ref="rulesEnergyUsage"/>
</drools:resources>
</drools:kbase>
<drools:ksession id="kSessionEnergyUsage"
kbase="kBaseEnergyUsage" type="stateful"/>
</beans>
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Kenny Wottrich (JIRA)