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  1. jBPM
  2. JBPM-7856

java.lang.ClassCastException: java.lang.Class cannot be cast to org.kie.api.event.rule.RuleRuntimeEventListener

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      • Unzip DebugRuleRuntimeEventListener_kjar.zip
      • mvn clean install
      • Upload target/debug-listener-kjar-1.0.0-SNAPSHOT.jar to business-central
      • Deploy the kjar for kie-server
      • Start the deployment
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      Unzip DebugRuleRuntimeEventListener_kjar.zip mvn clean install Upload target/debug-listener-kjar-1.0.0-SNAPSHOT.jar to business-central Deploy the kjar for kie-server Start the deployment

    Description

      If you configure event listeners in kmodule.xml,

      <kmodule xmlns="http://www.drools.org/xsd/kmodule" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <kbase name="defaultKieBase" default="true" eventProcessingMode="stream" equalsBehavior="identity">
    <ksession name="defaultKieSession" type="stateful" default="true" clockType="realtime">
      <fileLogger file="/tmp/AuditDebug.log" threaded="true" interval="1000" />
      <listeners>
        <ruleRuntimeEventListener type="org.drools.core.event.DebugRuleRuntimeEventListener"/>
        <agendaEventListener type="org.drools.core.event.DebugAgendaEventListener"/>
        <processEventListener type="org.drools.core.event.DebugProcessEventListener"/>
      </listeners>
    </ksession>
  </kbase>
</kmodule>

      You get the following error on kjar deployment/start in kie-server. (Note: the kjar contains a rule flow bpmn2 file so JbpmKieServerExtension is triggered)

      14:37:36,218 ERROR [stderr] (default task-8) java.lang.ClassCastException: java.lang.Class cannot be cast to org.kie.api.event.rule.RuleRuntimeEventListener
14:37:36,219 ERROR [stderr] (default task-8) 	at org.drools.compiler.kie.util.InjectionHelper.wireListeners(InjectionHelper.java:111)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.drools.compiler.kie.util.InjectionHelper.wireSessionComponents(InjectionHelper.java:75)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.drools.compiler.kie.util.InjectionHelper.wireSessionComponents(InjectionHelper.java:65)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.runtime.manager.impl.KModuleRegisterableItemsFactory.getWorkItemHandlers(KModuleRegisterableItemsFactory.java:91)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.runtime.manager.impl.AbstractRuntimeManager.registerItems(AbstractRuntimeManager.java:146)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.runtime.manager.impl.SingletonRuntimeManager.init(SingletonRuntimeManager.java:116)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.runtime.manager.impl.RuntimeManagerFactoryImpl.newSingletonRuntimeManager(RuntimeManagerFactoryImpl.java:64)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.kie.services.impl.AbstractDeploymentService.commonDeploy(AbstractDeploymentService.java:136)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.jbpm.kie.services.impl.KModuleDeploymentService.deploy(KModuleDeploymentService.java:203)
14:37:36,219 ERROR [stderr] (default task-8) 	at org.kie.server.services.jbpm.JbpmKieServerExtension.createContainer(JbpmKieServerExtension.java:416)
14:37:36,220 ERROR [stderr] (default task-8) 	at org.kie.server.services.impl.KieServerImpl.createContainer(KieServerImpl.java:248)
14:37:36,220 ERROR [stderr] (default task-8) 	at org.kie.server.remote.rest.common.resource.KieServerRestImpl.createContainer(KieServerRestImpl.java:138)
...

      It falls back to 2nd try and event listeners are eventually registered.

      https://github.com/kiegroup/jbpm/blob/7.11.x/jbpm-runtime-manager/src/main/java/org/jbpm/runtime/manager/impl/KModuleRegisterableItemsFactory.java#L91-L95

      The error is ignorable so debug log level would be suitable for this error stack.

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          Bug - A problem that impairs or prevents the functions of the product. RHPAM-1626 java.lang.ClassCastException: java.lang.Class cannot be cast to org.kie.api.event.rule.RuleRuntimeEventListener

          • Minor - To be worked after urgent, high, and medium priorities are resolved. This term is chosen when the severity of the issue is low, or the complexity or effort to correct it may be higher, relatively speaking. For low priority issues, known workarounds exist or are not needed due to the trivial effort needed to address the issue.
          • Closed

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              swiderski.maciej Maciej Swiderski (Inactive)
              rhn-support-tkobayas Toshiya Kobayashi
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                Updated:
                Resolved: