BPELUnit 测试 出现1次失败 SOAP fault

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bpelunit测试 HelloBPELProcess出现1次失败。原因是SOAP fault。求解答
出现“The operation net.bpelunit.framework.model.test.ReceiveDataSpecification@3af0be70 was expected to success,but replied with a SOAP fault”错误：

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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> <soapenv:Body> <soapenv:Fault xmlns:java="java:package org.apache.ode.axis2"> <faultcode>java:org.apache.ode.axis2.OdeFault</faultcode> <faultstring>SOAP body does not contain required part: payload.</faultstring> <detail> <Exception>org.apache.ode.axis2.OdeFault: SOAP body does not contain required part: payload. at org.apache.ode.axis2.ODEService.onAxisMessageExchange(ODEService.java:147) at org.apache.ode.axis2.hooks.ODEMessageReceiver.invokeBusinessLogic(ODEMessageReceiver.java:69) at org.apache.ode.axis2.hooks.ODEMessageReceiver.invokeBusinessLogic(ODEMessageReceiver.java:52) at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114) at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:173) at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:173) at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:144) at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668) at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2503) at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2492) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.ode.axis2.OdeFault: SOAP body does not contain required part: payload. at org.apache.ode.axis2.util.SoapMessageConverter.extractSoapBodyParts(SoapMessageConverter.java:404) at org.apache.ode.axis2.util.SoapMessageConverter.parseSoapRequest(SoapMessageConverter.java:325) at org.apache.ode.axis2.ODEService.onAxisMessageExchange(ODEService.java:118) ... 29 more Caused by: java.lang.IllegalArgumentException: SOAP body does not contain required part: payload. at org.apache.ode.utils.wsdl.Messages.msgSOAPBodyDoesNotContainRequiredPart(Messages.java:146) ... 32 more </Exception> </detail> </soapenv:Fault> </soapenv:Body> </soapenv:Envelope>