Try adding the following to your jasperreports import in your pom:
<exclusions>
                                <exclusion>
                                        <groupId>eclipse</groupId>
                                        <artifactId>jdtcore</artifactId>
                                </exclusion>
</exclusions>

The cause of the error is that the jasperreports team thought it'd be
a good idea to bundle a version of the eclipse compiler. That wreaks
all kind of havoc when using jasperreports with gwt.

I don't know if you'll be able to compile reports dynamically though,
so you'll have to check by yourself.

Cheers,

Salvador

On May 5, 1:27 pm, nmasilva <nmasi...@gmail.com> wrote:
> Hi all
>
> i'm having this error compiling my GWT app, it was working and
> sudently it came this error.
>
> Thanks in advance,
> Nuno Silva
>
> [WARNING] Attempting to build MavenProject instance for Artifact
> (org.codehaus.mojo:gwt-maven-plugin:1.1-20090430.172324-46) of type:
> maven-plugin; constructing POM artifact instead.
> [INFO] [gwt:compile]
> [INFO] using GWT jars from local installation C:\Program Files\gwt-
> windows-1.6.4
> [INFO] auto discovered modules
> [pt.uc.aac.judo.judoweb.gwt.entitiesDTO.EntitiesDTO,
> pt.uc.aac.judo.judoweb.gwt.presentation.gwt.Teste,
> pt.uc.aac.judo.judoweb.gwt.presentation.atletaForm.AtletaForm,
> pt.uc.aac.judo.judoweb.gwt.presentation.mainForm.MainForm]
> [INFO] establishing classpath list (scope = compile)
> [INFO] Compiling module
> pt.uc.aac.judo.judoweb.gwt.entitiesDTO.EntitiesDTO
> [INFO] [ERROR] Unexpected
> [INFO] 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
> [INFO]  at com.google.gwt.dev.javac.JdtCompiler$CompilerImpl.<init>
> (JdtCompiler.java:93)
> [INFO]  at com.google.gwt.dev.javac.JdtCompiler.<init>
> (JdtCompiler.java:236)
> [INFO]  at com.google.gwt.dev.javac.CompilationState.refresh
> (CompilationState.java:177)
> [INFO]  at com.google.gwt.dev.javac.CompilationState.<init>
> (CompilationState.java:93)
> [INFO]  at com.google.gwt.dev.cfg.ModuleDef.getCompilationState
> (ModuleDef.java:264)
> [INFO]  at com.google.gwt.dev.Precompile.precompile(Precompile.java:
> 283)
> [INFO]  at com.google.gwt.dev.Compiler.run(Compiler.java:170)
> [INFO]  at com.google.gwt.dev.Compiler$1.run(Compiler.java:124)
> [INFO]  at com.google.gwt.dev.CompileTaskRunner.doRun
> (CompileTaskRunner.java:84)
> [INFO]  at
> com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger
> (CompileTaskRunner.java:78)
> [INFO]  at com.google.gwt.dev.Compiler.main(Compiler.java:131)
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] BUILD ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Command [[
> C:\Program Files\Java\jdk1.6.0_12\jre\bin\java -Xmx512m -classpath "C:
> \Users\Nuno Silva\workspace\judoweb2\src\main\java";"C:\Users\Nuno
> Silva\workspace\judoweb2\src\main\webapp\WEB-INF\site\clube";"C:\Users
> \Nuno Silva\workspace\judoweb2\target\classes";"C:\Users\Nuno Silva
> \.m2\repository\com\google\gwt\gwt-user\1.6.4\gwt-user-1.6.4.jar";"C:
> \Users\Nuno Silva\.m2\repository\jdom\jdom\1.0\jdom-1.0.jar";"C:\Users
> \Nuno Silva\.m2\repository\log4j\log4j\1.2.9\log4j-1.2.9.jar";"C:\Users
> \Nuno Silva\.m2\repository\javax\servlet\servlet-api\2.4\servlet-
> api-2.4.jar";"C:\Users\Nuno Silva\.m2\repository\xerces\xercesImpl
> \2.8.1\xercesImpl-2.8.1.jar";"C:\Users\Nuno Silva\.m2\repository\xml-
> apis\xml-apis\1.3.03\xml-apis-1.3.03.jar";"C:\Users\Nuno Silva
> \.m2\repository\javax\transaction\jta\1.0.1B\jta-1.0.1B.jar";"C:\Users
> \Nuno Silva\.m2\repository\postgresql\postgresql
> \8.3-603.jdbc4\postgresql-8.3-603.jdbc4.jar";"C:\Users\Nuno Silva
> \.m2\repository\org\springframework\spring\2.5.6\spring-2.5.6.jar";"C:
> \Users\Nuno Silva\.m2\repository\commons-logging\commons-logging
> \1.1.1\commons-logging-1.1.1.jar";"C:\Users\Nuno Silva\.m2\repository
> \org\springframework\spring-test\2.5.6\spring-test-2.5.6.jar";"C:\Users
> \Nuno Silva\.m2\repository\javax\servlet\jstl\1.1.2\jstl-1.1.2.jar";"C:
> \Users\Nuno Silva\.m2\repository\taglibs\standard
> \1.1.2\standard-1.1.2.jar";"C:\Users\Nuno Silva\.m2\repository\net
> \sourceforge\stripes\stripes\1.4.3\stripes-1.4.3.jar";"C:\Users\Nuno
> Silva\.m2\repository\org\directwebremoting\dwr\2.0.2\dwr-2.0.2.jar";"C:
> \Users\Nuno Silva\.m2\repository\jasperreports\jasperreports
> \3.0.0\jasperreports-3.0.0.jar";"C:\Users\Nuno Silva\.m2\repository
> \commons-beanutils\commons-beanutils\1.8.0\commons-
> beanutils-1.8.0.jar";"C:\Users\Nuno Silva\.m2\repository\commons-
> collections\commons-collections\3.2.1\commons-
> collections-3.2.1.jar";"C:\Users\Nuno Silva\.m2\repository\commons-
> digester\commons-digester\1.8\commons-digester-1.8.jar";"C:\Users\Nuno
> Silva\.m2\repository\com\lowagie\itext\1.3.1\itext-1.3.1.jar";"C:\Users
> \Nuno Silva\.m2\repository\jfree\jcommon\1.0.2\jcommon-1.0.2.jar";"C:
> \Users\Nuno Silva\.m2\repository\jfree\jfreechart\1.0.9-brew
> \jfreechart-1.0.9-brew.jar";"C:\Users\Nuno Silva\.m2\repository\eclipse
> \jdtcore\3.1.0\jdtcore-3.1.0.jar";"C:\Users\Nuno Silva\.m2\repository
> \org\hibernate\hibernate\3.2.6.ga\hibernate-3.2.6.ga.jar";"C:\Users
> \Nuno Silva\.m2\repository\net\sf\ehcache\ehcache
> \1.2.3\ehcache-1.2.3.jar";"C:\Users\Nuno Silva\.m2\repository\asm\asm-
> attrs\1.5.3\asm-attrs-1.5.3.jar";"C:\Users\Nuno Silva\.m2\repository
> \dom4j\dom4j\1.6.1\dom4j-1.6.1.jar";"C:\Users\Nuno Silva\.m2\repository
> \antlr\antlr\2.7.6\antlr-2.7.6.jar";"C:\Users\Nuno Silva\.m2\repository
> \cglib\cglib\2.1_3\cglib-2.1_3.jar";"C:\Users\Nuno Silva\.m2\repository
> \asm\asm\1.5.3\asm-1.5.3.jar";"C:\Users\Nuno Silva\.m2\repository\org
> \hibernate\hibernate-annotations\3.3.1.GA\hibernate-
> annotations-3.3.1.GA.jar";"C:\Users\Nuno Silva\.m2\repository\org
> \hibernate\hibernate-commons-annotations\3.0.0.ga\hibernate-commons-
> annotations-3.0.0.ga.jar";"C:\Users\Nuno Silva\.m2\repository\org
> \hibernate\ejb3-persistence\1.0.1.GA\ejb3-persistence-1.0.1.GA.jar";"C:
> \Users\Nuno Silva\.m2\repository\org\hibernate\hibernate-entitymanager
> \3.3.2.GA\hibernate-entitymanager-3.3.2.GA.jar";"C:\Users\Nuno Silva
> \.m2\repository\javassist\javassist\3.4.GA\javassist-3.4.GA.jar";"C:
> \Users\Nuno Silva\.m2\repository\javax\mail\mail
> \1.3.2\mail-1.3.2.jar";"C:\Users\Nuno Silva\.m2\repository\javax
> \activation\activation\1.0.2\activation-1.0.2.jar";"C:\Users\Nuno Silva
> \.m2\repository\org\apache\poi\poi\3.1-FINAL\poi-3.1-FINAL.jar";"C:
> \Users\Nuno Silva\.m2\repository\org\springframework\security\spring-
> security-core\2.0.4\spring-security-core-2.0.4.jar";"C:\Users\Nuno
> Silva\.m2\repository\org\springframework\spring-core\2.0.8\spring-
> core-2.0.8.jar";"C:\Users\Nuno Silva\.m2\repository\org\springframework
> \spring-context\2.0.8\spring-context-2.0.8.jar";"C:\Users\Nuno Silva
> \.m2\repository\aopalliance\aopalliance\1.0\aopalliance-1.0.jar";"C:
> \Users\Nuno Silva\.m2\repository\org\springframework\spring-beans
> \2.5.6\spring-beans-2.5.6.jar";"C:\Users\Nuno Silva\.m2\repository\org
> \springframework\spring-aop\2.0.8\spring-aop-2.0.8.jar";"C:\Users\Nuno
> Silva\.m2\repository\commons-codec\commons-codec\1.3\commons-
> codec-1.3.jar";"C:\Users\Nuno Silva\.m2\repository\org\springframework
> \security\spring-security-core-tiger\2.0.4\spring-security-core-
> tiger-2.0.4.jar";"C:\Users\Nuno Silva\.m2\repository\org\aspectj
> \aspectjrt\1.5.4\aspectjrt-1.5.4.jar";"C:\Users\Nuno Silva
> \.m2\repository\org\springframework\spring-web\2.5.6\spring-
> web-2.5.6.jar";"C:\Users\Nuno Silva\.m2\repository\com\extjs\gxt\2.0-
> m1\gxt-2.0-m1.jar";"C:\Users\Nuno Silva\.m2\repository\net\sf\dozer
> \dozer\5.0\dozer-5.0.jar";"C:\Users\Nuno Silva\.m2\repository\commons-
> lang\commons-lang\2.4\commons-lang-2.4.jar";"C:\Program Files\gwt-
> windows-1.6.4\gwt-dev-windows.jar" com.google.gwt.dev.Compiler -gen "C:
> \Users\Nuno Silva\workspace\judoweb2\target\.generated" -logLevel INFO
> -style OBF -war "C:\Users\Nuno Silva\workspace\judoweb2\src\main
> \webapp" -localWorkers 2
> pt.uc.aac.judo.judoweb.gwt.entitiesDTO.EntitiesDTO
> pt.uc.aac.judo.judoweb.gwt.presentation.gwt.Teste
> pt.uc.aac.judo.judoweb.gwt.presentation.atletaForm.AtletaForm
> pt.uc.aac.judo.judoweb.gwt.presentation.mainForm.MainForm
> ]] failed with status 1
> [INFO]
> ------------------------------------------------------------------------
> [INFO] For more information, run Maven with the -e switch
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 25 seconds
> [INFO] Finished at: Tue May 05 12:24:25 BST 2009
> [INFO] Final Memory: 9M/17M
> [INFO]
> ------------------------------------------------------------------------
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