Can't launch GWT app: NoSuchMethodError

[TomHj]

I upgraded my environment to GWT 1.5.2, downloaded the latest GWTDesigner 5.1.0, and started fresh with the latest Eclipse version 3.4.1.

But I can't get any GWT app to run.

I used the Designer GWT wizard to create a new entry point module. Without changing the "click me" sample code, I tried to run the app but I get "Failure to load module 'xxxxxxxx'"

The detailed error says:
[ERROR] Failure to load module 'com.rg.gwt.testing.Testing'
java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.Compiler.<init>(Lorg/eclipse/jdt/internal/compiler/env/INameEnvironment;Lorg/eclipse/jdt/internal/compiler/IErrorHandlingPolicy;Lorg/eclipse/jdt/internal/compiler/impl/CompilerOptions;Lorg/eclipse/jdt/internal/compiler/ICompilerRequestor;Lorg/eclipse/jdt/internal/compiler/IProblemFactory;)V
at com.google.gwt.dev.javac.JdtCompiler$CompilerImpl.<init>(JdtCompiler.java:93)
at com.google.gwt.dev.javac.JdtCompiler.<init>(JdtCompiler.java:231)
at com.google.gwt.dev.javac.JdtCompiler.compile(JdtCompiler.java:193)
at com.google.gwt.dev.javac.CompilationState.compile(CompilationState.java:115)
at com.google.gwt.dev.cfg.ModuleDef.updateTypeOracle(ModuleDef.java:477)
at com.google.gwt.dev.cfg.ModuleDef.getTypeOracle(ModuleDef.java:324)
at com.google.gwt.dev.GWTShell$BrowserWidgetHostImpl.createModuleSpaceHost(GWTShell.java:252)
at com.google.gwt.dev.shell.ie.BrowserWidgetIE6$External.gwtOnLoad(BrowserWidgetIE6.java:72)
at com.google.gwt.dev.shell.ie.BrowserWidgetIE6$External.invoke(BrowserWidgetIE6.java:139)
at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java:294)
at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java:194)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:117)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720)
at com.google.gwt.dev.GWTShell.run(GWTShell.java:593)
at com.google.gwt.dev.GWTShell.main(GWTShell.java:357)

Any ideas? This is on Windows XP if that makes a difference.

thanks,
Tom

[Eric Clayberg]

Problems running in hosted mode are generally outside the scope of what we can help you with.

A NoSuchMethodError exception would seem to imply some problem with either your Eclipse or GWT installation.

To investigate this further, we would need to see the properties of the launch process and the "ext" folder of your JRE library.

process.png (129.73 KiB) Viewed 1380 times

[TomHj]

I found my problem. I had rebuilt my project and inadvertently included a jasper-compiler-jdt.jar which contains a different version of the org.eclipse.jdt.internal.compiler.Compiler than what GWT is expecting. Removing that jar file cleared up the problem.

Tom

[Eric Clayberg]

Yep. Having a non-standard compiler in the mix would definitely account for that.