我是stackOverflow的新手,所以,再次=)
我正在使用Jena Semantic Web Framework,Pellet Reasoner,Eclipse IDE(在Linux机器上)和Virtuoso OSE来存储我的图形。我还使用Protege Editor =)创建了我的本体。
我正在使用SOAP工作的Client-Server应用程序,我编写了一个读取基本模型的过程,使用pellet应用推理并将整个推理模型写入临时owl文件,然后,另一个过程读取推理模型并将其存储在Virtuoso中,因此我可以使用Python客户端通过Virtuoso的SPARQL端点进行查询。
问题在于,当我调用调用生成推理模型的过程的Web服务时,我收到此消息(此问题末尾的完整堆栈跟踪)
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.lang.reflect.InvocationTargetException
faultActor:
faultNode:
faultDetail:
{http://xml.apache.org/axis/}hostname:leia
这是生成推理模型的例程,而这就是抛出异常的那个。
public InfModel reasonOverModel(String path) {
Model emptyModel = ModelFactory.createDefaultModel();
// Pellet instance
Reasoner reasoner = PelletReasonerFactory.theInstance().create();
InfModel model = ModelFactory.createInfModel(reasoner, emptyModel);
try {
InputStream in = FileManager.get().open(path);
model.read(in, "");
} catch (Exception ex) {
// TODO: log with log4j
ex.printStackTrace();
return null;
}
return model;
}
它正在从“路径”中读取基本模型并且它正在应用推理,但它没有返回,我的catch子句没有捕获该异常,我不知道为什么。这似乎是轴心问题。
任何想法,线索或推荐? 非常感谢提前 招呼来自加拉加斯 - 委内瑞拉 ----------------------------在这里完成Stacktrace ------------------- ----------
AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException faultSubcode: faultString: java.lang.reflect.InvocationTargetException faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}hostname:leia java.lang.reflect.InvocationTargetException at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222) at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129) at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at javax.xml.parsers.SAXParser.parse(SAXParser.java:395) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) at com.thesis.server.Admin.updateReasonedModel(Admin.java:21) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397) at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186) at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:454) at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281) at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:298) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)
编辑JAN 19:
我也尝试将所有内容从tomcat 7移动到tomcat 6.0.35,因为@RakeshPatel建议如下,但仍然得到相同的异常。
我一直在阅读有关InvocationTargetException并且它包装了其他异常,因此,我在客户端捕获它并通过使用getCause()方法得到原因,但它返回null。这很奇怪,因为我调试了它,它似乎正在执行所有的try块,但它永远不会到达return语句。
任何线索或建议?
答案 0 :(得分:0)
我已经解决了这个问题,
Jena似乎不是线程安全的(如果我错了,请告诉我),这就是为什么我不能将它作为Web服务公开,我选择开发一个使用Jena类并管理我的单独的Web应用程序OWL文档,全部使用Java。