mod_cluster cannot properly determine connector pool statistics from Tomcat 6 when using an Executor thread pool. It fails with the following exception:

ERROR ContainerBackgroundProcessor[StandardEngine[Catalina]] org.apache.catalina.core.ContainerBase - Exception invoking periodic operation:
java.lang.IllegalStateException
at org.jboss.modcluster.container.catalina.CatalinaEngine.getProxyConnector(CatalinaEngine.java:153)
at org.jboss.modcluster.ModClusterService.connectionEstablished(ModClusterService.java:306)
at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:372)
at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:347)
at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:460)
at org.jboss.modcluster.container.catalina.CatalinaEventHandlerAdapter.lifecycleEvent(CatalinaEventHandlerAdapter.java:239)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1385)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1649)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1638)
at java.lang.Thread.run(Thread.java:619)