访问http://域名/msg就报错?报错

波总，这是什么错误？

接收消息:
[Fatal Error] :1:1: 文件提前结束。
09-Apr-2016 15:11:33.874 SEVERE [http-apr-80-exec-10] com.jfinal.core.ActionHandler.error /msg

 java.lang.RuntimeException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; 文件提前结束。
    at com.jfinal.weixin.sdk.kit.XmlKit.parse(XmlKit.java:45)
    at com.jfinal.weixin.sdk.msg.InMsgParser.parse(InMsgParser.java:38)
    at com.jfinal.weixin.sdk.jfinal.MsgController.getInMsg(MsgController.java:142)
    at com.jfinal.weixin.sdk.jfinal.MsgController.index(MsgController.java:54)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.jfinal.aop.Invocation.invoke(Invocation.java:73)
    at com.jfinal.weixin.sdk.jfinal.MsgInterceptor.intercept(MsgInterceptor.java:46)
    at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
    at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)
    at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:217)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:184)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:105)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:361)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1080)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:75)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:757)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2287)
    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.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; 文件提前结束。
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:257)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:348)
    at com.jfinal.weixin.sdk.kit.XmlKit.parse(XmlKit.java:39)
    ... 30 more