when I use apache and mod_jk for load balancer,I met the following problem . I don't know why it happend .maybe the configration file isn't correct .I don't know .
the log is :
2006-05-31 17:45:50,155 ERROR [org.apache.catalina.connector.CoyoteAdapter] An exception or error occurred in the container during the request processing
java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.remove(ArrayList.java:390)
at org.jboss.security.SecurityAssociation$RunAsThreadLocalStack.pop(SecurityAssociation.java:623)
at org.jboss.security.SecurityAssociation.popRunAsIdentity(SecurityAssociation.java:544)
at org.jboss.web.tomcat.security.SecurityAssociationActions$PopRunAsRoleAction.run(SecurityAssociationActions.java:113)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.web.tomcat.security.SecurityAssociationActions.popRunAsIdentity(SecurityAssociationActions.java:171)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:160)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
