Re: GWT 2.5 dev mode refresh error

[Michal Moravcik]

I found a workaround solution.

When I manually reset the cached generator result in my ServiceInterfaceProxyGenerator the problem disappears.

public class RpcInterceptorServiceProxyGenerator extends ServiceInterfaceProxyGenerator {

@Override

public RebindResult generateIncrementally(TreeLogger logger, GeneratorContext ctx, String requestedClass) throws UnableToCompleteException {

((StandardGeneratorContext) ctx).setCachedGeneratorResult(null); // reset cached result here

super.generateIncrementally(logger, ctx, requestedClass);

// ... generate code ...

return new RebindResult(RebindMode.USE_ALL_NEW, newTypeName);

}

}

If anybody finds a better solution, please let me know. Thanks.

Michal Moravcik

Dňa utorok, 15. januára 2013 23:08:23 UTC+1 Michal Moravcik napísal(-a):

Lately I have upgraded GWT to version 2.5.0 and sice then I am experiencing a problem with Developer mode.

First time the GWT module is loaded as usually with no problem, but when I try to reload it (F5 in browser) without doing anything on page or changing any code I am getting following error:

00:00:22.768 [ERROR] Generator 'eu.geomodel.solargis.gwt.codegen.RpcInterceptorServiceProxyGenerator' threw an exception while rebinding 'eu.geomodel.solargis.common.rpc.CustomerService'

java.lang.NullPointerException: null 

at com.google.gwt.user.rebind.rpc.TypeSerializerCreator.findReusableCachedFieldSerializerIfAvailable(TypeSerializerCreator.java:328) 

at com.google.gwt.user.rebind.rpc.TypeSerializerCreator.createFieldSerializer(TypeSerializerCreator.java:260) 

at com.google.gwt.user.rebind.rpc.TypeSerializerCreator.createFieldSerializers(TypeSerializerCreator.java:288) 

at com.google.gwt.user.rebind.rpc.TypeSerializerCreator.realize(TypeSerializerCreator.java:189) 

at com.google.gwt.user.rebind.rpc.ProxyCreator.generateTypeHandlers(ProxyCreator.java:702) 

at com.google.gwt.user.rebind.rpc.ProxyCreator.create(ProxyCreator.java:352) 

at com.google.gwt.user.rebind.rpc.ServiceInterfaceProxyGenerator.generateIncrementally(ServiceInterfaceProxyGenerator.java:67) 

at eu.geomodel.solargis.gwt.codegen.RpcInterceptorServiceProxyGenerator.generateIncrementally(RpcInterceptorServiceProxyGenerator.java:55) 

at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:651) 

at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:41) 

at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79) 

at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276) 

at com.google.gwt.dev.shell.ShellModuleSpaceHost.rebind(ShellModuleSpaceHost.java:141) 

at com.google.gwt.dev.shell.ModuleSpace.rebind(ModuleSpace.java:595) 

at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:465) 

at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:49) 

at com.google.gwt.core.shared.GWT.create(GWT.java:57) 

at com.google.gwt.core.client.GWT.create(GWT.java:85) 

at eu.geomodel.solargis.common.rpc.eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.get_Key$type$eu$geomodel$solargis$common$rpc$CustomerServiceAsync$_annotation$$none$$(eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.java:83) 

at eu.geomodel.solargis.gwt.customer.eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.get_Key$type$eu$geomodel$solargis$gwt$customer$CustomerPresenter$_annotation$$none$$(eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.java:51) 

at eu.geomodel.solargis.gwt.customer.eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.initializeEagerSingletons(eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector_fragment.java:125) 

at eu.geomodel.solargis.gwt.account.gin.eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector.initializeEagerSingletons(eu_geomodel_solargis_gwt_account_gin_AccountGinjector_AccountGinjectorGinjector.java:788) 

at eu.geomodel.solargis.gwt.account.gin.eu_geomodel_solargis_gwt_account_gin_AccountGinjectorImpl.<init>(eu_geomodel_solargis_gwt_account_gin_AccountGinjectorImpl.java:10) 

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 

at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 

at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:475) 

at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:49) 

at com.google.gwt.core.shared.GWT.create(GWT.java:57) 

at com.google.gwt.core.client.GWT.create(GWT.java:85) 

at eu.geomodel.solargis.gwt.account.gin.AccountGinjector$Holder.<clinit>(AccountGinjector.java:28) 

at eu.geomodel.solargis.gwt.account.AccountEntryPoint.onModuleLoad(AccountEntryPoint.java:25) 

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:601) 

at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:406) 

at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200) 

at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526) 

at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) 

at java.lang.Thread.run(Thread.java:722)

The error can be seen in both Chrome and Firefox. Actually when I first load the GWT module in Chrome (with no problem) and then in Firefox I get the same error (and vice versa: firstly in FF then error in Chrome), so I think it is more-less browser independent.

Do you have any clue what might be the problem? Thank you for help

Regards,

Michal Moravcik

[Thomas Broyer]

You can disable the generators' result caching by setting the gwt.disableGeneratorResultCaching system property.

It's strange though that you have this NPE to begin with. Could you try running DevMode with "-ea" (in the JVM options) and/or "-logLevel DEBUG" (in the program args) and see there's something interesting in the output?

[Michal Moravcik]

Yes, the gwt.disableGeneratorResultCaching flag helped and I can remove my previous hack.

After adding debug options I don't see anything special in logs. Anyway I can try prepare sample project demostrating the problem.

Dňa štvrtok, 17. januára 2013 9:36:17 UTC+1 Thomas Broyer napísal(-a):