GWT 2.8.0 RC1 is here!

[Daniel Kurka]

Hi all,

I just build the GWT 2.8.0 RC1 and pushed it to maven central. The complete SDK is also available from here.

Please start testing and let us know if you run into any trouble and file bugs.

We are planing to release this as GWT 2.8.0 if we do not here about any serious issues within the next two weeks. The release notes for RC1 will be made available shortly after this notice, in the mean time you can take a look at the github repository.

Daniel,

on behalf of the GWT team

[Kay Pac]

That is fantastic! Thanks to you and the rest of the team for your hard work. I am having trouble with IDE support, but that is related to the product (IntellIJ) and not GWT itself

Awesome!

[Sri Harsha Chilakapati]

It's working for me in IntelliJ Ultimate. The community edition does not support the GWT.

[Kirill Prazdnikov]

My IDEA works perfectly with GWT master.

[Kirill Prazdnikov]

Hi Daniel, 

Thanks for the release.

The maven plugin still requires (and downloads) the BETA version, even if my project does not have BETA in configuration.

There is a workaround,  Thomas kindly pointed to it, but.

 

Is it possible to update the plugin ?

Thanks

[Jens]

You should file a bug on the maven plugin issue tracker https://github.com/gwt-maven-plugin/gwt-maven-plugin

-- J.

[Julien Dramaix]

The release note is now available on the web site: http://www.gwtproject.org/release-notes.html#Release_Notes_2_8_0_RC1

- Julien

On Fri, Jul 29, 2016 at 11:19 AM Jens <jens.ne...@gmail.com> wrote:

You should file a bug on the maven plugin issue tracker https://github.com/gwt-maven-plugin/gwt-maven-plugin

-- J.

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[Ignacio Baca Moreno-Torres]

Hi Kirill, this is a known limitation of the mojo plugin, you really should try this one https://github.com/tbroyer/gwt-maven-plugin/ which solves most of the limitation of the mojo plugin. In any case, mojo plugin will be released as 2.8.0-rc1 in the next days.

[dflorey]

Very nice indeed!

Now I'm just waiting for App Engine to support Java 8, then I can start migrating our codebase, hurray!

Thanks!

[Frank Taffelt]

thanks for the rc.

updated a project coming from 2.7.0. the project is mainly based on thomas gwt maven-archetypes.

the following build error is dumped doing an mvn package on the gwt-compilation step:

[INFO]                   [WARN] Line 39 column 7: encountered "(". Was expecting one of: <IDENT>

[INFO]    [ERROR] An internal compiler exception occurred

[INFO] com.google.gwt.dev.jjs.InternalCompilerException: Unexpected error during visit.

[INFO]  at com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:111)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:276)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO]  at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)

[INFO]  at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:72)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO]  at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)

[INFO]  at com.google.gwt.dev.jjs.ast.JDeclarationStatement.traverse(JDeclarationStatement.java:49)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:88)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:331)

[INFO]  at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:92)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO]  at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:139)

[INFO]  at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:135)

[INFO]  at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO]  at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:785)

[INFO]  at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:777)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:265)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:1379)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:875)

[INFO]  at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1410)

[INFO]  at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1222)

[INFO]  at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:1140)

[INFO]  at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile(JavaToJavaScriptCompiler.java:255)

[INFO]  at com.google.gwt.dev.Precompile.precompile(Precompile.java:255)

[INFO]  at com.google.gwt.dev.Precompile.precompile(Precompile.java:202)

[INFO]  at com.google.gwt.dev.Precompile.precompile(Precompile.java:143)

[INFO]  at com.google.gwt.dev.Compiler.compile(Compiler.java:204)

[INFO]  at com.google.gwt.dev.Compiler.compile(Compiler.java:155)

[INFO]  at com.google.gwt.dev.Compiler.compile(Compiler.java:144)

[INFO]  at com.google.gwt.dev.Compiler$1.run(Compiler.java:118)

[INFO]  at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)

[INFO]  at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)

[INFO]  at com.google.gwt.dev.Compiler.main(Compiler.java:125)

[INFO] Caused by: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal

[INFO]  at java.lang.ClassLoader.defineClass1(Native Method)

[INFO]  at java.lang.ClassLoader.defineClass(ClassLoader.java:760)

[INFO]  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

[INFO]  at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)

[INFO]  at java.net.URLClassLoader.access$100(URLClassLoader.java:73)

[INFO]  at java.net.URLClassLoader$1.run(URLClassLoader.java:368)

[INFO]  at java.net.URLClassLoader$1.run(URLClassLoader.java:362)

[INFO]  at java.security.AccessController.doPrivileged(Native Method)

[INFO]  at java.net.URLClassLoader.findClass(URLClassLoader.java:361)

[INFO]  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

[INFO]  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

[INFO]  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

[INFO]  at org.apache.xerces.jaxp.DocumentBuilderImpl.newDocument(Unknown Source)

[INFO]  at com.google.gwt.uibinder.rebind.W3cDocumentBuilder.<init>(W3cDocumentBuilder.java:51)

[INFO]  at com.google.gwt.uibinder.rebind.W3cDomHelper.documentFor(W3cDomHelper.java:69)

[INFO]  at com.google.gwt.uibinder.rebind.UiBinderGenerator.getW3cDoc(UiBinderGenerator.java:208)

[INFO]  at com.google.gwt.uibinder.rebind.UiBinderGenerator.generateOnce(UiBinderGenerator.java:183)

[INFO]  at com.google.gwt.uibinder.rebind.UiBinderGenerator.generate(UiBinderGenerator.java:128)

[INFO]  at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)

[INFO]  at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:745)

[INFO]  at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:103)

[INFO]  at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:78)

[INFO]  at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:262)

[INFO]  at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:251)

[INFO]  at com.google.gwt.dev.PrecompilationContextCreator$1.getAllPossibleRebindAnswers(PrecompilationContextCreator.java:86)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:493)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:463)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleMagicMethodCall(UnifyAst.java:588)

[INFO]  at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:293)

[INFO]  at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:268)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)

[INFO]  at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)

[INFO]  ... 40 more

[INFO] Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal

[INFO]  at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

[INFO]  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

[INFO]  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

[INFO]  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

[INFO]  ... 72 more

[INFO]       [ERROR] at DashboardAdminMainPanel.java(52): GWT.create(DashboardAdminMainPanel$Binder.class)

[INFO]          com.google.gwt.dev.jjs.ast.JMethodCall

[Manuel Carrasco Moñino]

Seems like gwt-dev is not in your classpath

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[Thomas Broyer]

I'd start with double-checking your dependencies. With 2.8 from the Central repository, most dependencies that used to be bundled into the gwt-user and gwt-dev JARs have now been unbundled and properly declared as Maven dependencies, so you may have had exclusions that now need to be removed.

I just updated my archetypes to 2.8.0-rc1 and they still work OK (from the tests): https://travis-ci.org/tbroyer/gwt-maven-archetypes/builds/148343628

[Frank Taffelt]

some steps further:

[INFO] \- com.google.gwt:gwt-dev:jar:2.8.0-rc1:compile

[INFO]    +- com.google.code.gson:gson:jar:2.6.2:compile

[INFO]    +- org.ow2.asm:asm:jar:5.0.3:compile

[INFO]    +- org.ow2.asm:asm-util:jar:5.0.3:compile

[INFO]    |  \- org.ow2.asm:asm-tree:jar:5.0.3:compile

[INFO]    |     \- (org.ow2.asm:asm:jar:5.0.3:compile - omitted for duplicate)

[INFO]    +- org.ow2.asm:asm-commons:jar:5.0.3:compile

[INFO]    |  \- (org.ow2.asm:asm-tree:jar:5.0.3:compile - omitted for duplicate)

[INFO]    +- colt:colt:jar:1.2.0:compile

[INFO]    +- ant:ant:jar:1.6.5:compile

[INFO]    +- commons-collections:commons-collections:jar:3.2.2:compile

[INFO]    +- commons-io:commons-io:jar:2.4:compile

[INFO]    +- com.ibm.icu:icu4j:jar:50.1.1:compile

[INFO]    +- tapestry:tapestry:jar:4.0.2:compile

[INFO]    +- net.sourceforge.htmlunit:htmlunit:jar:2.19:compile

[INFO]    |  +- xalan:xalan:jar:2.7.2:compile

[INFO]    |  |  \- xalan:serializer:jar:2.7.2:compile

[INFO]    |  |     \- xml-apis:xml-apis:jar:1.3.04:compile

in the referenced xml-apis version 1.3.04 there is no class  org/w3c/dom/ElementTraversal. So adding a new dependency to xml-apis with version 1.4.01 fixed my build.  

btw: trying a clean dagger-guice-rf-activities (because it also uses UI binder) build also breaks on my system with the same error. 

[Andrei Preda]

Hi and thank you for the RC1,

I have a problem that I can't wrap my head around, because I don't know if it is a problem with the RC1 or with the gwtjackson lib?

Everything works fine with gwt2.8.0-beta1 but if I try to compile with RC1 the following is logged:

Computing all possible rebind results for 'com.google.gwt.user.client.DocumentModeAsserter.DocumentModeProperty'
            Rebinding com.google.gwt.user.client.DocumentModeAsserter.DocumentModeProperty
               Checking rule <replace-with class='com.github.nmorel.gwtjackson.client.JsonSerializationContext.DefaultBuilder'/>
                  [WARN] Unknown type 'com.github.nmorel.gwtjackson.client.JsonSerializationContext.Builder' specified in deferred binding rule
               Checking rule <generate-with class='com.github.nmorel.gwtjackson.rebind.ObjectMapperGenerator'/>
                  [WARN] Unknown type 'com.github.nmorel.gwtjackson.client.ObjectWriter' specified in deferred binding rule
         [ERROR] Errors in 'com/github/nmorel/gwtjackson/client/JsonSerializer.java'
            [ERROR] Line 19: The import javax.annotation.Nonnull cannot be resolved
            [ERROR] Line 20: The import javax.annotation.Nullable cannot be resolved
            [ERROR] Line 121: Nullable cannot be resolved to a type
            [ERROR] Line 128: Nullable cannot be resolved to a type
            [ERROR] Line 140: Nonnull cannot be resolved to a type
         Tracing compile failure path for type 'com.github.nmorel.gwtjackson.client.JsonSerializer'
            [ERROR] Errors in 'com/github/nmorel/gwtjackson/client/JsonSerializer.java'
               [ERROR] Line 128: Nullable cannot be resolved to a type
               [ERROR] Line 121: Nullable cannot be resolved to a type
               [ERROR] Line 140: Nonnull cannot be resolved to a type
               [ERROR] Line 20: The import javax.annotation.Nullable cannot be resolved
               [ERROR] Line 19: The import javax.annotation.Nonnull cannot be resolved

Can anyone point me to a solution?

Thank you for your help,

Andrei

[Thomas Broyer]

This is https://github.com/gwtproject/gwt/issues/9382 and is a bug in gwt-jackson's POM.

[Thomas Broyer]

Do you somehow exclude xerces?

Here's dependency:tree excerpt from the "dynatablerf" sample; see how it inherits 1.4.01 from xercesImpl 2.11.0:

[INFO] +- com.google.gwt:gwt-dev:jar:2.8.0-rc1:provided

[INFO] |  +- com.google.code.gson:gson:jar:2.6.2:provided

[INFO] |  +- org.ow2.asm:asm:jar:5.0.3:provided

[INFO] |  +- org.ow2.asm:asm-util:jar:5.0.3:provided

[INFO] |  |  \- org.ow2.asm:asm-tree:jar:5.0.3:provided

[INFO] |  +- org.ow2.asm:asm-commons:jar:5.0.3:provided

[INFO] |  +- colt:colt:jar:1.2.0:provided

[INFO] |  +- ant:ant:jar:1.6.5:provided

[INFO] |  +- commons-collections:commons-collections:jar:3.2.2:provided

[INFO] |  +- commons-io:commons-io:jar:2.4:provided

[INFO] |  +- com.ibm.icu:icu4j:jar:50.1.1:provided

[INFO] |  +- tapestry:tapestry:jar:4.0.2:provided

[INFO] |  +- net.sourceforge.htmlunit:htmlunit:jar:2.19:provided

[INFO] |  |  +- xalan:xalan:jar:2.7.2:provided

[INFO] |  |  |  \- xalan:serializer:jar:2.7.2:provided

[INFO] |  |  +- org.apache.commons:commons-lang3:jar:3.4:provided

[INFO] |  |  +- org.apache.httpcomponents:httpclient:jar:4.5.1:provided

[INFO] |  |  |  \- org.apache.httpcomponents:httpcore:jar:4.4.3:provided

[INFO] |  |  +- org.apache.httpcomponents:httpmime:jar:4.5.1:provided

[INFO] |  |  +- commons-codec:commons-codec:jar:1.10:provided

[INFO] |  |  +- net.sourceforge.htmlunit:htmlunit-core-js:jar:2.17:provided

[INFO] |  |  +- xerces:xercesImpl:jar:2.11.0:provided

[INFO] |  |  |  \- xml-apis:xml-apis:jar:1.4.01:provided

[INFO] |  |  +- net.sourceforge.nekohtml:nekohtml:jar:1.9.22:provided

[INFO] |  |  +- net.sourceforge.cssparser:cssparser:jar:0.9.18:provided

[INFO] |  |  +- commons-logging:commons-logging:jar:1.2:provided

Maybe it could be linked to the version of Maven being used? Which version are you using?

[Frank Taffelt]

thanks for spotting in the right direction. yes i had an exclusion for the xerces in another dependency.

[Andrei Preda]

Thank you!!

[Frank Wynants]

I run my app using an ant script and have the following gwt jars in my classpath like I had with beta 1 : gwt-codeserver.jar ; gwt-dev.jar ; validation-api-1.0.0.GA-sources.jar ; validation-api-1.0.0.GA.jar
I don't use any GWT-RPC stuff or servlets.

All seems to be working now at first sight :-)

[Mark Duesbury]

Hi .. Thanks for the rc...

I have been struggling for a while now with a java.lang.OutOfMemoryError: GC overhead limit exceeded error on compilation since switching to GWT 2.8.0 beta1. I thought and hoped the problem would be solved with the release of the RC, but it hasn't. I have searched high and low on stackoverflow and elsewhere and tried just about every combination of jvm settings I could find.. but nothing works. I dont think my project is that large with 215 source files.

The last settings I tried were...

<executions>

<execution>

            <configuration>

<localWorkers>4</localWorkers>

  <extraJvmArgs>-Xmx2g -Xms1g -Xss1024k</extraJvmArgs>

                  <draftcompile>true</draftcompile>

            </configuration>

<goals>

<goal>compile</goal>

</goals>

</execution>

</executions>

The error occurs at different points in the compile cycle... A few samples are shown below...

[ERROR] Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded

[ERROR] at org.eclipse.jdt.internal.compiler.lookup.BoundSet.<init>(BoundSet.java:308)

[ERROR] at org.eclipse.jdt.internal.compiler.lookup.InferenceContext18.createInitialBoundSet(InferenceContext18.java:230)

[ERROR] at org.eclipse.jdt.internal.compiler.lookup.ConstraintExpressionFormula.inferInvocationApplicability(ConstraintExpressionFormula.java:336)

[ERROR] at org.eclipse.jdt.internal.compiler.lookup.InferenceContext18.inferInvocationApplicability(InferenceContext18.java:370)

[ERROR] at org.eclipse.jdt.internal.compiler.lookup.ParameterizedGenericMethodBinding.computeCompatibleMethod18(ParameterizedGenericMethodBinding.java:233)

[Roberto Lublinerman]

You might need to increase the heap size. JDT still uses more memory under Java 8 which is the source level that is currently supported by GWT (try -Xmx3g or  -Xmx4g). 

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[Mark Duesbury]

Just tried with -Xmx8g (running on 16gb Macbook Pro)....

[ERROR] Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded

[ERROR] at com.google.gwt.dev.jjs.impl.ReferenceMapper.createType(ReferenceMapper.java:280)

[ERROR] at com.google.gwt.dev.jjs.impl.ReferenceMapper.get(ReferenceMapper.java:146)

[ERROR] at com.google.gwt.dev.jjs.impl.GwtAstBuilder.createField(GwtAstBuilder.java:3900)

[ERROR] at com.google.gwt.dev.jjs.impl.GwtAstBuilder.createMembers(GwtAstBuilder.java:3969)

[ERROR] at com.google.gwt.dev.jjs.impl.GwtAstBuilder.processImpl(GwtAstBuilder.java:3825)

[ERROR] at com.google.gwt.dev.jjs.impl.GwtAstBuilder.process(GwtAstBuilder.java:3860)

[ERROR] at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater$UnitProcessorImpl.process(CompilationStateBuilder.java:129)

[ERROR] at com.google.gwt.dev.javac.JdtCompiler$CompilerImpl.process(JdtCompiler.java:384)

[ERROR] at org.eclipse.jdt.internal.compiler.Compiler.processCompiledUnits(Compiler.java:546)

[ERROR] at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:458)

[ERROR] at com.google.gwt.dev.javac.JdtCompiler.doCompile(JdtCompiler.java:1089)

[ERROR] at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater.compile(CompilationStateBuilder.java:325)

[ERROR] at com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:548)

[ERROR] at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:479)

[ERROR] at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:465)

[ERROR] at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:423)

[ERROR] at com.google.gwt.dev.Precompile.precompile(Precompile.java:222)

[ERROR] at com.google.gwt.dev.Precompile.precompile(Precompile.java:202)

[ERROR] at com.google.gwt.dev.Precompile.precompile(Precompile.java:143)

[ERROR] at com.google.gwt.dev.Compiler.compile(Compiler.java:204)

[ERROR] at com.google.gwt.dev.Compiler.compile(Compiler.java:155)

[ERROR] at com.google.gwt.dev.Compiler.compile(Compiler.java:144)

[ERROR] at com.google.gwt.dev.Compiler$1.run(Compiler.java:118)

[ERROR] at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)

[ERROR] at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)

[ERROR] at com.google.gwt.dev.Compiler.main(Compiler.java:125)

Full GWT Maven Plugin config....

<!-- GWT Maven Plugin -->

<plugin>

<groupId>org.codehaus.mojo</groupId>

<artifactId>gwt-maven-plugin</artifactId>

<version>2.8.0-beta1</version>

<dependencies>

<dependency>

<groupId>com.google.gwt</groupId>

<artifactId>gwt-user</artifactId>

<version>${gwtversion}</version>

</dependency>

<dependency>

<groupId>com.google.gwt</groupId>

<artifactId>gwt-dev</artifactId>

<version>${gwtversion}</version>

</dependency>

<dependency>

<groupId>com.google.gwt</groupId>

<artifactId>gwt-servlet</artifactId>

<version>${gwtversion}</version>

</dependency>

</dependencies>

<executions>

<execution>

            <configuration>

              <extraJvmArgs>-Xms1024M -Xmx8g -Xss1024k</extraJvmArgs>

            </configuration>

<goals>

<goal>compile</goal>

</goals>

</execution>

</executions>

<configuration>

<runTarget>desktop.html</runTarget>

<hostedWebapp>${project.build.directory}/${project.build.finalName}</hostedWebapp>

<noserver>true</noserver>

<compileReport>true</compileReport>

<inplace>true</inplace>

<logLevel>INFO</logLevel>

</configuration>

</plugin> 

It works fine if I switch back to GWT 2.7.0

[Roberto Lublinerman]

The issue was addressed post beta 1. Please use the 2.8rc1 instead.

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[Mark Duesbury]

Sorry should have mentioned...

gwtversion is set to...

<gwtversion>2.8.0-rc1</gwtversion>

But because there was not a 2.8.0-rc1 version of the gwt-maven-plugin i changed the version of the plugin back to 2.8.0-beta1 (should have changed it to 2.8.0-SNAPSHOT)

I just changed the version of the gwt-maven-plugin to 2.8.0-SNAPSHOT and ran again.... Still the same out of memory error occurs.

[Mark Duesbury]

Problem solved.. 

I had the configuration in the wrong place. Should be...

<executions>

<execution>

                  <phase>prepare-package</phase>

<goals>

<goal>compile</goal>

</goals>

</execution>

</executions>

<configuration>

        <extraJvmArgs>-Xms2g -Xmx4g -Xss1024k</extraJvmArgs>

<runTarget>desktop.html</runTarget>

<hostedWebapp>${project.build.directory}/${project.build.finalName}</hostedWebapp>

<noserver>true</noserver>

<compileReport>true</compileReport>

<inplace>true</inplace>

<logLevel>INFO</logLevel>

</configuration>

It seems 2.8 is less forgiving than 2.7 in this regard