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POgwt java.lang.ExceptionInInitializerError
 

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  1. POgwt java.lang.ExceptionInInitializerError
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    <p>I'm working on a GWT app, and keep getting the error shown below. </p> <p>I followed the GWT tutorial regarding naming conventions for servlet classes, and followed the Service / Async / ServiceImpl structure. </p> <p>I also tried adding the <code>-XX:-UseSplitVerifier</code> VM argument to fix a previous problem. any ideas on what's going on?</p> <pre><code>SEVERE: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call java.lang.ExceptionInInitializerError at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_ (Runtime.java:127) at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance (Runtime.java:135) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.instantiate (ServerSerializationStreamReader.java:914) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize (ServerSerializationStreamReader.java:556) at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject (AbstractSerializationStreamReader.java:119) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader$ValueReader$8. readValue(ServerSerializationStreamReader.java:138) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeValue (ServerSerializationStreamReader.java:385) at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:303) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall (RemoteServiceServlet.java:206) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost (RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost (AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1166) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter (HeaderVerificationFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1157) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter (ServeBlobFilter.java:60) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter (TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter (StaticFileFilter.java:122) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1157) at com.google.appengine.tools.development.BackendServersFilter.doFilter (BackendServersFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle (ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle (DevAppEngineWebAppContext.java:78) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle (JettyContainerService.java:369) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.UnsupportedOperationException: ERROR: GWT.create() is only usable in client code! It cannot be called, for example, from server code. If you are running a unit test, check that your test case extends GWTTestCase and that GWT.create() is not called from within an initializer or constructor. at com.google.gwt.core.client.GWT.create(GWT.java:91) at com.google.gwt.user.client.ui.UIObject.&lt;clinit&gt;(UIObject.java:187) ... 46 more </code></pre>
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    1. COnoticed the `ERROR: GWT.create() is only usable in client code!`? look it up in your servlets
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    2. COi don't have GWT.create() in my server code, only in client code
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    3. COdid you configure you deployment descriptor (`web.xml`) accordingly?
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