Hi folks,
I have a process using a timer start event followed by a java service task similar to the following example:
Using the demo environment (activiti 5.6, changed database to mysql, thats all) I deployed the JAR-File including the above service class to
apache-tomcat-6.0.32\webapps\activiti-rest\WEB-INF\lib
Deploying my process leads to the following somehow odd behavour:
The very first timer event works correctly
- producing test output like
But the next call of the timer (2 minutes later) leads to a ClastCastException:
Starting the process manually via Activiti Explorer is always successful. Any idea about the timer event classloading issue?
Thanks in advance
Gunnar
I have a process using a timer start event followed by a java service task similar to the following example:
<startEvent id="TestStart" name="TestStart">
…
<outgoing>SequenceFlow</outgoing>
<timerEventDefinition id="sid-a94d4371-18ae-47e9-9fa6-7cd68a92d439">
<timeCycle id="sid-f1f79392-82d9-4ba8-a510-6ce058ecc0e5" xsi:type="tFormalExpression">0 0/2 * * * ?</timeCycle>
</timerEventDefinition>
</startEvent>
…
<serviceTask id="TestTask0003" name="TestTask0003" activiti:class="de.beck.test.delegate.SysoutDelegate">
…
<incoming>SequenceFlow</incoming>
<outgoing>SequenceFlow_2</outgoing>
</serviceTask>
…
Using the demo environment (activiti 5.6, changed database to mysql, thats all) I deployed the JAR-File including the above service class to
apache-tomcat-6.0.32\webapps\activiti-rest\WEB-INF\lib
Deploying my process leads to the following somehow odd behavour:
The very first timer event works correctly
- producing test output like
Mon Jun 13 18:34:00 CEST 2011: Execution 116 passes by TestTask0003…
But the next call of the timer (2 minutes later) leads to a ClastCastException:
13.06.2011 18:36:00 org.activiti.engine.impl.interceptor.CommandContext close
SCHWERWIEGEND: Error while closing command context
org.activiti.engine.ActivitiException: couldn't instantiate class de.beck.test.delegate.SysoutDelegate
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:131)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:148)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDelegate.java:121)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:102)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:40)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListener
Start.java:48)
…
Caused by: org.activiti.engine.ActivitiClassLoadingException: Could not load class: de.beck.test.delegate.SysoutDelegate
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:81)
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:128)
… 69 more
Caused by: java.lang.NoClassDefFoundError: org/activiti/engine/delegate/JavaDelegate
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1667)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:62)
… 70 more
Caused by: java.lang.ClassNotFoundException: org.activiti.engine.delegate.JavaDelegate
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
… 86 more
Starting the process manually via Activiti Explorer is always successful. Any idea about the timer event classloading issue?
Thanks in advance
Gunnar
Good catch!
So my Kick-Start configuration is causing trouble and disabling the Kick-Start's JobExecutor within the activiti.cfg.xml is the solution:
Thank you
So my Kick-Start configuration is causing trouble and disabling the Kick-Start's JobExecutor within the activiti.cfg.xml is the solution:
<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
…
<property name="jobExecutorActivate" value="false" />
…
</bean>
Thank you
