Exceptions when shutting down Tomcat

To reproduce:

• Download tomcat (7.0.0-alpha2) distribution
• startup tomcat
• shutdown tomcat

-> The following exceptions occur in server-log

– First Exception:

SCHWERWIEGEND: Exception while performing operation step 'Stopping process applications': org.camunda.bpm.container.impl.jmx.services.JmxManagedProcessApplication cannot be cast to org.camunda.bpm.application.ProcessApplicationReference
java.lang.ClassCastException: org.camunda.bpm.container.impl.jmx.services.JmxManagedProcessApplication cannot be cast to org.camunda.bpm.application.ProcessApplicationReference
at org.camunda.bpm.container.impl.jmx.deployment.StopProcessApplicationsStep.performOperationStep(StopProcessApplicationsStep.java:45)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanDeploymentOperation.execute(MBeanDeploymentOperation.java:116)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanServiceContainer.executeDeploymentOperation(MBeanServiceContainer.java:128)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanDeploymentOperation$MBeanDeploymentOperationBuilder.execute(MBeanDeploymentOperation.java:206)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.undeployBpmPlatform(TomcatBpmPlatformBootstrap.java:87)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.lifecycleEvent(TomcatBpmPlatformBootstrap.java:60)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:402)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:347)
at org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:748)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:751)
at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:897)
23.04.2013 17:02:59 org.camunda.bpm.engine.impl.jobexecutor.JobExecutor shutdown

– Second Exception:
SCHWERWIEGEND: Exception while performing operation step 'Undeploying process archvie null': null
java.lang.NullPointerException
at org.camunda.bpm.container.impl.jmx.deployment.UndeployProcessArchiveStep.performOperationStep(UndeployProcessArchiveStep.java:62)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanDeploymentOperation.execute(MBeanDeploymentOperation.java:116)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanServiceContainer.executeDeploymentOperation(MBeanServiceContainer.java:128)
at org.camunda.bpm.container.impl.jmx.kernel.MBeanDeploymentOperation$MBeanDeploymentOperationBuilder.execute(MBeanDeploymentOperation.java:206)
at org.camunda.bpm.container.impl.jmx.JmxRuntimeContainerDelegate.undeployProcessApplication(JmxRuntimeContainerDelegate.java:164)
at org.camunda.bpm.application.AbstractProcessApplication.undeploy(AbstractProcessApplication.java:77)
at org.camunda.bpm.application.impl.ServletProcessApplication.contextDestroyed(ServletProcessApplication.java:87)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4831)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5478)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
23.04.2013 17:02:59 org.springframework.context.support.AbstractApplicationContext doClose