Hi List,
I'm relatively new to Apache CXF and managed to implement a Webservice
using JAX-WS which returns MTOM attachments. My service connects to a
Webserver and gets the content of the MTOM attachment by reading a Java
HTTPConnection. Sometimes there seems to be no content in the
HTTPConnection inputStream, so I implemented a check for this case which
throws an exception.
At a first glance everything is ok but when I do some load test with
SoapUI I get this exception in the tomcat log:
java.lang.NullPointerException
at javax.activation.DataHandler.writeTo(DataHandler.java:90)
at
org.apache.cxf.attachment.AttachmentSerializer.writeAttachments(AttachmentSerializer.java:129)
at
org.apache.cxf.interceptor.AttachmentOutInterceptor$AttachmentOutEndingInterceptor.handleMessage(AttachmentOutInterceptor.java:77)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:220)
at
org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:74)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:220)
at
org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:77)
at
org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:92)
at
org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:213)
at
org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:150)
at
org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:170)
at
org.apache.cxf.transport.servlet.AbstractCXFServlet.doPost(AbstractCXFServlet.java:148)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)
11.04.2008 16:18:33 org.apache.cxf.phase.PhaseInterceptorChain doIntercept
INFO: Interceptor has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: Error writing to XMLStreamWriter.
at
org.apache.cxf.binding.soap.interceptor.Soap11FaultOutInterceptor.handleMessage(Soap11FaultOutInterceptor.java:140)
at
org.apache.cxf.binding.soap.interceptor.Soap11FaultOutInterceptor.handleMessage(Soap11FaultOutInterceptor.java:43)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:220)
at
org.apache.cxf.interceptor.AbstractFaultChainInitiatorObserver.onMessage(AbstractFaultChainInitiatorObserver.java:96)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:254)
at
org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:74)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:220)
at
org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:77)
at
org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:92)
at
org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:213)
at
org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:150)
at
org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:170)
at
org.apache.cxf.transport.servlet.AbstractCXFServlet.doPost(AbstractCXFServlet.java:148)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.xml.stream.XMLStreamException: Trying to output second
root, <soap:Fault>
at
com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1473)
at
com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1480)
at
com.ctc.wstx.sw.BaseStreamWriter.reportNwfStructure(BaseStreamWriter.java:1508)
at
com.ctc.wstx.sw.BaseNsStreamWriter.checkStartElement(BaseNsStreamWriter.java:444)
at
com.ctc.wstx.sw.SimpleNsStreamWriter.writeStartOrEmpty(SimpleNsStreamWriter.java:260)
at
com.ctc.wstx.sw.BaseNsStreamWriter.writeStartElement(BaseNsStreamWriter.java:319)
at
org.apache.cxf.binding.soap.interceptor.Soap11FaultOutInterceptor.handleMessage(Soap11FaultOutInterceptor.java:71)
... 29 more
Can anybody explain me what happens here and how I can change my code this
exception disappears?
Help is appreciated,
Christoph
