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org.apache.log4j.PatternLayout cannot be cast to org.apache.log4j.Layout
java.lang.ClassCastException: org.apache.log4j.PatternLayout cannot be cast to org.apache.log4j.Layout	at org.apache.log4j.xml.DOMConfigurator.parseLayout(DOMConfigurator.java:446)	at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:186)	at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:140)	at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:153)	at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:415)	at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.java:335)	at com.collaxa.ServerLoggerManager$DOMConfigurator.parseCategory(ServerLoggerManager.java:464)	at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:781)	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:666)	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:616)	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:584)	at com.collaxa.ServerLoggerManager.init(ServerLoggerManager.java:69)	at oracle.bpel.services.common.ServicesLogger.initLoging(ServicesLogger.java:602)	at oracle.bpel.services.common.ServicesLogger.getLogger(ServicesLogger.java:183)	at oracle.bpel.services.common.ServicesLogger.canLog(ServicesLogger.java:373)	at oracle.bpel.services.workflow.util.LogUtil.isLoggingEnabled(LogUtil.java:56)	at oracle.bpel.services.workflow.util.LogUtil.isDebugLoggingEnabled(LogUtil.java:67)	at oracle.bpel.services.workflow.util.LogUtil.verifyAndLogDebugMessage(LogUtil.java:138)	at oracle.bpel.services.workflow.query.impl.TaskQueryService.authenticate(TaskQueryService.java:157)	at com.abc.workflow.task.service.ABCTaskService.getWorkFlowContext(ABCTaskService.java:2011)	at com.abc.workflow.task.service.ABCTaskService.customTaskAction(ABCTaskService.java:1647)	at com.abc.workflow.task.facade.runtime.ABCTaskServiceSOAPPortBinding_Tie.invoke_customTaskAction(ABCTaskServiceSOAPPortBinding_Tie.java:910)	at com.abc.workflow.task.facade.runtime.ABCTaskServiceSOAPPortBinding_Tie.processingHook(ABCTaskServiceSOAPPortBinding_Tie.java:1474)	at oracle.j2ee.ws.server.StreamingHandler.handle(StreamingHandler.java:297)	at oracle.j2ee.ws.server.JAXRPCProcessor.doEndpointProcessing(JAXRPCProcessor.java:430)	at oracle.j2ee.ws.server.WebServiceProcessor.invokeEndpointImplementation(WebServiceProcessor.java:379)	at oracle.j2ee.ws.server.JAXRPCProcessor.doRequestProcessing(JAXRPCProcessor.java:294)	at oracle.j2ee.ws.server.WebServiceProcessor.processRequest(WebServiceProcessor.java:114)	at oracle.j2ee.ws.server.JAXRPCProcessor.doService(JAXRPCProcessor.java:151)	at oracle.j2ee.ws.server.WebServiceServlet.doPost(WebServiceServlet.java:200)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)	at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:908)	at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:313)	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:199)	at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)	at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)	at java.lang.Thread.run(Thread.java:619)