Ugly problem with java.lang.reflect.InvocationTargetException

Question

Hello,
I am writing a web service which connects to WebSphere MQ queue manager and puts a message on a queue.
I use Eclipse and as usual I followed more or less the hints given at:
http://www.eclipse.org/webtools/jst/components/ws/1.5/tutorials/BottomUpWebService/BottomUpWebService.html
I have chosen Tomcat 5.5.20 as target server (had to, because otherwise it does not create a server-config.wsdd file), the web service WSDL thingies and the client were created successfully.
I have created WAR files and everything went fine when I tested the thing on JBoss.
Bad things started after I deployed the things on the Tomcat server. When I start the client I receive java.lang.reflect.InvocationTargetException as a result. The web service itself does not generate any exception, but the client does (I'll post the dump later..).
During the debug it turned that the exception is generated at the moment when the web service program tries to call any of the WebSphere functions.
Now - 1st obvious thing was to check if I have com.ibm.mq.jar in the WEB-INF/lib directory inside my WAR files. Yep! There it was.
So.. if the thing works just fine on JBoss and it booms on Tomcat I wonder whats the hack here? I copied all of the MQ libraries i have from JBOSS_HOME/lib to CATALINA_HOME/shared/lib and CATALINA_HOME/common/lib. Well.. that's quite ugly, because all necessary jars are inside the WEB-INF/lib directory. Anyway nothing of the above helped me running the thing on Tomcat.
Do you have any suggestions or have anyone of you ever had such problem?
Here are the exception dump and part of the code:
  - Setting up MQ environment:
     - Setting hostname...
An AxisFault exception occured: java.lang.reflect.InvocationTargetException
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:ghjvk0j
java.lang.reflect.InvocationTargetException
     at org.apache.axis.message.SOAPFaultBuilder.create
Fault(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.XMLDocumentFragmentScanne
rImpl$Fragment ContentDispatcher.dispatch(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerI
mpl.scanDocument(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
Source)
     at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse
(Unknown Source)
     at javax.xml.parsers.SAXParser.parse(Unknown Source)
     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 pl.pzu.services.TfiAuthenticationSoapBindingStub.
verify(TfiAuthenticationSoapBindingStub.java:245)
     at pl.pzu.services.TfiAuthenticationProxy.
verify(TfiAuthenticationProxy.java:45)
     at org.apache.jsp.sampleTfiAuthenticationProxy.
Result_jsp._jspService(Result_jsp.java:158)
     at org.apache.jasper.runtime.HttpJspBase.
service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.
service(HttpServlet.java:802)
     at org.apache.jasper.servlet.JspServletWrapper.
service(JspServletWrapper.java:334)
     at org.apache.jasper.servlet.JspServlet.
serviceJspFile(JspServlet.java:314)
     at org.apache.jasper.servlet.JspServlet.
service(JspServlet.java:264)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(
ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(
StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:178)
     at org.apache.catalina.core.StandardHostValve.invoke(
StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(
ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(
StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(
CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(
Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11Connec
tionHandler.processConnection(Http11BaseProtocol.java:664)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(Pool
TcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(Lea
derFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(
ThreadPool.java:684)
     at java.lang.Thread.run(Unknown Source)There is the part of the web service code where the event occurs:
     public void writeMessage(String message,
String message_ID) throws Exception
          System.out.println("      - Setting up MQ environment: ");
          try
               System.out.println("      - Setting hostname...");
     NEXT LINE CAUSES THE CLIENT TO THROW
     This is the first call to any WebSphere assets.
     During debug It says the it is unable to inspect the MQEnvironment
     object...
               MQEnvironment.hostname = m_config.getQMHost();
               System.out.println("      - Setting port...");
               MQEnvironment.port = m_config.getQMPort();
               System.out.println("      - Setting channel...");
               MQEnvironment.channel = m_config.getQMChannel();
     }I think that if it works on JBoss and it doesn't on Tomcat it is not coding problem, but rather a configuration...
Thanx for any ideas or help from ur side.

Answer 1

Did you have any success on this?
I also have the same problem with Tomcat 6.
I had Tomcat 5.0 working with this code, but when we migrated to Tomcat 6.0, I am getting this exception on the clent side. I figured out that it is occuring on invoking WebSphere MQ call from the code.
Thanks