Ok... simply create a qualifier with that type of value in the client side, for example:

@Qualifier @Retention(RetentionPolicy.RUNTIME) @Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE}) public @interface Test { String[] value(); }

you don't need to use it ... simply create it

[INFO] INFO [QualifierEqualityFactoryGenerator] Generating QualifierEqualityFactory... [INFO] ERROR [QualifierEqualityFactoryGenerator] Error generating QualifierEqualityFactory [INFO] org.jboss.errai.codegen.exception.InvalidTypeException: [Z is not assignable from [Ljava.lang.String; [INFO] in method call: java.util.Arrays.equals([[Z, [Z]) [INFO] at org.jboss.errai.codegen.util.GenUtil.assertAssignableTypes(GenUtil.java:170) [INFO] at org.jboss.errai.codegen.util.GenUtil.convert(GenUtil.java:187) [INFO] at org.jboss.errai.codegen.util.GenUtil.generateCallParameters(GenUtil.java:99) [INFO] at org.jboss.errai.codegen.builder.callstack.MethodCall.handleCall(MethodCall.java:110) [INFO] at org.jboss.errai.codegen.builder.callstack.AbstractCallElement.nextOrReturn(AbstractCallElement.java:46) [INFO] at org.jboss.errai.codegen.builder.callstack.LoadClassReference.handleCall(LoadClassReference.java:48) [INFO] at org.jboss.errai.codegen.builder.impl.AbstractStatementBuilder.generate(AbstractStatementBuilder.java:61) [INFO] at org.jboss.errai.codegen.util.Bool$1.generate(Bool.java:49) [INFO] at org.jboss.errai.codegen.util.GenUtil.generate(GenUtil.java:130) [INFO] at org.jboss.errai.codegen.builder.impl.BooleanExpressionBuilder.generate(BooleanExpressionBuilder.java:64) [INFO] at org.jboss.errai.codegen.control.IfBlock.generate(IfBlock.java:60) [INFO] at org.jboss.errai.codegen.builder.callstack.ConditionalBlockCallElement.handleCall(ConditionalBlockCallElement.java:46) [INFO] at org.jboss.errai.codegen.builder.impl.AbstractStatementBuilder.generate(AbstractStatementBuilder.java:61) [INFO] at org.jboss.errai.codegen.BlockStatement.generate(BlockStatement.java:90) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaMethod.toJavaString(BuildMetaMethod.java:343) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaClass.membersToString(BuildMetaClass.java:789) [INFO] at org.jboss.errai.codegen.builder.impl.AnonymousClassStructureBuilderImpl.doGenerate(AnonymousClassStructureBuilderImpl.java:183) [INFO] at org.jboss.errai.codegen.builder.impl.AnonymousClassStructureBuilderImpl.access$200(AnonymousClassStructureBuilderImpl.java:43) [INFO] at org.jboss.errai.codegen.builder.impl.AnonymousClassStructureBuilderImpl$3.generate(AnonymousClassStructureBuilderImpl.java:152) [INFO] at org.jboss.errai.codegen.builder.impl.ObjectBuilder$2.doDeferred(ObjectBuilder.java:175) [INFO] at org.jboss.errai.codegen.builder.callstack.DeferredCallElement.handleCall(DeferredCallElement.java:42) [INFO] at org.jboss.errai.codegen.builder.impl.AbstractStatementBuilder.generate(AbstractStatementBuilder.java:61) [INFO] at org.jboss.errai.codegen.builder.impl.ObjectBuilder.generate(ObjectBuilder.java:183) [INFO] at org.jboss.errai.codegen.util.GenUtil.generate(GenUtil.java:130) [INFO] at org.jboss.errai.codegen.util.GenUtil.generateCallParameters(GenUtil.java:76) [INFO] at org.jboss.errai.codegen.builder.callstack.MethodCall.handleCall(MethodCall.java:61) [INFO] at org.jboss.errai.codegen.builder.callstack.AbstractCallElement.nextOrReturn(AbstractCallElement.java:46) [INFO] at org.jboss.errai.codegen.builder.callstack.LoadVariable.handleCall(LoadVariable.java:122) [INFO] at org.jboss.errai.codegen.builder.impl.AbstractStatementBuilder.generate(AbstractStatementBuilder.java:61) [INFO] at org.jboss.errai.codegen.BlockStatement.generate(BlockStatement.java:90) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaConstructor.toJavaString(BuildMetaConstructor.java:279) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaClass.membersToString(BuildMetaClass.java:779) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaClass.toJavaString(BuildMetaClass.java:682) [INFO] at org.jboss.errai.codegen.meta.impl.build.BuildMetaClass.toJavaString(BuildMetaClass.java:582) [INFO] at org.jboss.errai.codegen.builder.impl.ClassBuilder.toJavaString(ClassBuilder.java:493) [INFO] at org.jboss.errai.ioc.rebind.ioc.bootstrapper.QualifierEqualityFactoryGenerator.generateQualifierEqualityFactory(QualifierEqualityFactoryGenerator.java:173) [INFO] at org.jboss.errai.ioc.rebind.ioc.bootstrapper.QualifierEqualityFactoryGenerator.generate(QualifierEqualityFactoryGenerator.java:72) [INFO] at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40) [INFO] at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:760) [INFO] at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:160) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:265) [INFO] at com.google.gwt.dev.DistillerRebindPermutationOracle.getAllPossibleRebindAnswers(DistillerRebindPermutationOracle.java:87) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:485) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:443) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleMagicMethodCall(UnifyAst.java:576) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:306) [INFO] at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:248) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128) [INFO] at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:67) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128) [INFO] at com.google.gwt.dev.jjs.ast.JReturnStatement.traverse(JReturnStatement.java:40) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:95) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:351) [INFO] at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:92) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:149) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:145) [INFO] at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:600) [INFO] at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:569) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:1505) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:870) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1305) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1038) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.precompile(JavaToJavaScriptCompiler.java:954) [INFO] at com.google.gwt.dev.jjs.MonolithicJavaToJavaScriptCompiler.precompile(MonolithicJavaToJavaScriptCompiler.java:303) [INFO] at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:38) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:286) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:229) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:145) [INFO] at com.google.gwt.dev.Compiler.run(Compiler.java:206) [INFO] at com.google.gwt.dev.codeserver.Recompiler.doCompile(Recompiler.java:333) [INFO] at com.google.gwt.dev.codeserver.Recompiler.compile(Recompiler.java:161) [INFO] at com.google.gwt.dev.codeserver.Recompiler.recompile(Recompiler.java:119) [INFO] at com.google.gwt.dev.codeserver.Outbox.recompile(Outbox.java:128) [INFO] at com.google.gwt.dev.codeserver.JobRunner.recompile(JobRunner.java:81) [INFO] at com.google.gwt.dev.codeserver.JobRunner.access$100(JobRunner.java:34) [INFO] at com.google.gwt.dev.codeserver.JobRunner$2.run(JobRunner.java:73) [INFO] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [INFO] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [INFO] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [INFO] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [INFO] at java.lang.Thread.run(Thread.java:745) [INFO] Caused by: java.lang.RuntimeException: Problem was caused by this call [INFO] at org.jboss.errai.codegen.builder.callstack.AbstractCallElement.(AbstractCallElement.java:33) [INFO] at org.jboss.errai.codegen.builder.callstack.MethodCall.(MethodCall.java:52) [INFO] at org.jboss.errai.codegen.builder.impl.StatementBuilder.invokeStatic(StatementBuilder.java:250) [INFO] at org.jboss.errai.codegen.builder.impl.StatementBuilder.invokeStatic(StatementBuilder.java:256) [INFO] at org.jboss.errai.codegen.util.Stmt.invokeStatic(Stmt.java:231) [INFO] Caused by: java.lang.RuntimeException: External call to API [INFO] at org.jboss.errai.ioc.rebind.ioc.bootstrapper.QualifierEqualityFactoryGenerator.generateComparatorFor(QualifierEqualityFactoryGenerator.java:220) [INFO] at org.jboss.errai.ioc.rebind.ioc.bootstrapper.QualifierEqualityFactoryGenerator.generateQualifierEqualityFactory(QualifierEqualityFactoryGenerator.java:125) [INFO] at org.jboss.errai.ioc.rebind.ioc.bootstrapper.QualifierEqualityFactoryGenerator.generate(QualifierEqualityFactoryGenerator.java:72) [INFO] at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40) [INFO] at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:760) [INFO] at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:160) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276) [INFO] at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:265) [INFO] at com.google.gwt.dev.DistillerRebindPermutationOracle.getAllPossibleRebindAnswers(DistillerRebindPermutationOracle.java:87) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:485) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:443) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleMagicMethodCall(UnifyAst.java:576) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:306) [INFO] at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:248) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128) [INFO] at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:67) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128) [INFO] at com.google.gwt.dev.jjs.ast.JReturnStatement.traverse(JReturnStatement.java:40) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:95) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:351) [INFO] at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:92) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:149) [INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:145) [INFO] at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:600) [INFO] at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:569) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293) [INFO] at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:1505) [INFO] at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:870) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1305) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1038) [INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.precompile(JavaToJavaScriptCompiler.java:954) [INFO] at com.google.gwt.dev.jjs.MonolithicJavaToJavaScriptCompiler.precompile(MonolithicJavaToJavaScriptCompiler.java:303) [INFO] at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:38) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:286) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:229) [INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:145) [INFO] at com.google.gwt.dev.Compiler.run(Compiler.java:206) [INFO] at com.google.gwt.dev.codeserver.Recompiler.doCompile(Recompiler.java:333) [INFO] at com.google.gwt.dev.codeserver.Recompiler.compile(Recompiler.java:161) [INFO] at com.google.gwt.dev.codeserver.Recompiler.recompile(Recompiler.java:119) [INFO] at com.google.gwt.dev.codeserver.Outbox.recompile(Outbox.java:128) [INFO] at com.google.gwt.dev.codeserver.JobRunner.recompile(JobRunner.java:81) [INFO] at com.google.gwt.dev.codeserver.JobRunner.access$100(JobRunner.java:34) [INFO] at com.google.gwt.dev.codeserver.JobRunner$2.run(JobRunner.java:73) [INFO] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [INFO] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [INFO] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [INFO] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [INFO] at java.lang.Thread.run(Thread.java:745) [INFO]          [ERROR] Errors in 'org/jboss/errai/ioc/client/Container.java' [INFO]            [ERROR] Line 54: Failed to resolve 'org.jboss.errai.ioc.client.QualifierEqualityFactory' via deferred binding [INFO]          Computing all possible rebind results for 'org.jboss.errai.marshalling.client.api.MarshallerFactory' [INFO]            Rebinding org.jboss.errai.marshalling.client.api.MarshallerFactory [INFO]                Invoking generator org.jboss.errai.marshalling.rebind.MarshallersGenerator [INFO]                  Generating Marshallers Bootstrapper... [INFO]          [WARN] For the following type(s), generated source was never committed (did you forget to call commit()?) [INFO]            [WARN] org.jboss.errai.ioc.client.QualifierEqualityFactoryImpl [INFO]          Unification traversed 29907 fields and methods and 2789 types. 2751 are considered part of the current module and 2751 had all of their fields and methods traversed. [INFO]      [ERROR] Compiler returned false [INFO]      [WARN] recompile failed [INFO]      [WARN] continuing to serve previous version

Max ... any feedback on this?

Cheers.

Ok Max ... no workaround but the issue will be fixed on the next release.

That is the way the community works

Thank you