Hi Shay, Thanks for your input. And yes, I did see the "Load library successful" message. I've also fixed the code with static { } block. However, I still received the same error message. Any other thoughts?
Thanks, Dennis 2010/7/2 Shay Rojansky <r...@roji.org> > Hi Dennis. > > So do you see the "Load library successful" message? > > Also, if I remember correctly, the code in eval.java is not a safe way to > load a native library. It's a very good idea to place the > System.loadLibrary > in a static { } block, instead of in a method. The way your class is > written, it's possible for the run method to be executed more than once, in > which case loadLibrary will be called more than once (and so will the > native > initModels). Not sure what the effects are and if it's related to your > problem but it's a good idea to avoid trouble by fixing it. > > Shay > > On Fri, Jul 2, 2010 at 3:46 AM, dennis ch <dennis.ch2...@gmail.com> wrote: > > > Hi, > > > > I have a java class (eval.java) that invokes a native method in an so > file > > (libmodel.so, using SWIG 1.3.29 to generate JNI code/wrapper and compiled > > the library). I can use System.loadLibrary() to load the libmodel.so > > without > > any error (-Djava.library.path=/usr/lib), and the native method > initModel() > > works fine as a standalone application. > > > > However, when I deploy it as a web service (tomcat 6.0.26 + axis2 1.5.1 + > > eclipse jee helios) to call the native method, I got the following error > > (the first line means the .so was successfully loaded): > > > > Load library successfully > > > > [ERROR] com.model.modelJNI.initModel()V > > java.lang.reflect.InvocationTargetException > > 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.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194) > > at > > > org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:102) > > at > > > org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40) > > 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:167) > > at > > org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:142) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > > at > > > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) > > at > > > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) > > at > > > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) > > at > > > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) > > at > > > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) > > at > > > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) > > at > > > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > > at > > > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) > > at > > > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) > > at > > > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) > > at > > org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) > > at java.lang.Thread.run(Thread.java:619) > > Caused by: java.lang.UnsatisfiedLinkError: > com.model.modelJNI.initModel()V > > at com.model.modelJNI.initModel(Native Method) > > at com.model.model.initModel(model.java:13) > > at com.webservice.run(EvalVita.java:763) > > ... 25 more > > > > > > Below is the body of Eval.java: > > > > import com.model.*; > > > > public class Eval { > > > > static void loadModel() { > > > > try { > > System.loadLibrary("model"); > > > > System.out.println("Load library successfully"); > > > > } catch (UnsatisfiedLinkError e) { > > > > System.err.println("Native code library failed to load." + e); > > > > } > > } > > public void run() { > > > > loadModel(); > > model.initModel(); > > } > > } > > > > > > Do I miss anything here? Any input is appreciated! > > > > Dennis > > >