I have a GWT 2.3 web app using Objectdb via Rpc. In the embedded mode in eclipse (with Jetty) everything runs fine. When i try to deploy the app on a Tomcat6 Server I get the following Error:
29.08.2011 16:07:40 org.apache.catalina.core.ApplicationContext log
SCHWERWIEGEND: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.List coffee.rpc.RpcCallService.getUsers()' threw an unexpected exception: java.lang.NoClassDefFoundError: Could not initialize class com.objectdb.o.RCL
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
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:859)
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:636)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.objectdb.o.RCL
at com.objectdb.o.UNM$z.<init>(UNM.java:163)
at com.objectdb.o.UNM.x(UNM.java:105)
at com.objectdb.o.UNM.w(UNM.java:75)
at com.objectdb.jpa.Provider.createEntityManagerFactory(Provider.java:56)
at com.objectdb.jpa.Provider.createEntityManagerFactory(Provider.java:32)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:78)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at coffee.server.DbHandler.<init>(DbHandler.java:34)
at coffee.server.DbHandler.getInstance(DbHandler.java:40)
at coffee.server.RpcCallServiceImpl.getUsers(RpcCallServiceImpl.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
... 17 more
of course the Objectd lib is in the Build Path and the jar file (including com.objectdb.o.RCL.class) is in its place (WEB-INF/lib). Any ideas why Tomcat has problems working with objectdb?
It turned out that this was a permission problem. If you get this error make sure your tomcat can access all necessary files.