maven - ¿Por qué Drools no está trabajando con Java 8?

java-8 surefire

Question

Acabo de instalar la versión final de Java 8. Cuando trato de compilar mi proyecto con Maven, muchas pruebas fallan si uso Java 8, pero pasa bien con Java 7. He intentado ejecutarlo a través de la línea de comandos con JAVA_HOME configurado C: / Archivos de programa / Java / jdk1.8.0 y mediante Eclipse con jdk1.8.0 seleccionado como el JRE predeterminado en los JRE instalados. Ambos fallan. Tenga en cuenta que todas las pruebas que fallan utilizan Drools 6 (y sus dependencias).

Aquí está la salida:

-------------------------------------------------------------------------------
Test set: com.local.lds.rules.LocmChiTest
-------------------------------------------------------------------------------
Tests run: 3, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 1.245 sec <<< FAILURE!
test(com.local.lds.rules.LocmChiTest)  Time elapsed: 0.001 sec  <<< ERROR!
java.lang.ExceptionInInitializerError
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187)
    at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invoke(MethodReflection.java:63)
    at mockit.Invocation.proceed(Invocation.java:192)
    at mockit.integration.junit4.internal.BlockJUnit4ClassRunnerDecorator.createTest(BlockJUnit4ClassRunnerDecorator.java:59)
    at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invokeWithCheckedThrows(MethodReflection.java:95)
    at mockit.internal.mockups.MockMethodBridge.callMock(MockMethodBridge.java:75)
    at mockit.internal.mockups.MockMethodBridge.invoke(MockMethodBridge.java:41)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java)
    at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
    at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
    at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
Caused by: java.lang.RuntimeException: wrong class format
    at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:279)
    at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:219)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:113)
    at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:122)
    at org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding.resolve(ParameterizedTypeBinding.java:861)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:100)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveTypeFor(BinaryTypeBinding.java:1081)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.getField(BinaryTypeBinding.java:869)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.findField(Scope.java:1052)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.findField(Scope.java:998)
    at org.eclipse.jdt.internal.compiler.lookup.MethodScope.findField(MethodScope.java:354)
    at org.eclipse.jdt.internal.compiler.lookup.BlockScope.getBinding(BlockScope.java:474)
    at org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference.resolveType(QualifiedNameReference.java:930)
    at org.eclipse.jdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:374)
    at org.eclipse.jdt.internal.compiler.ast.Expression.resolve(Expression.java:947)
    at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:90)
    at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:260)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:456)
    at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:252)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:415)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1148)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1258)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:539)
    at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:763)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:468)
    at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:405)
    at org.drools.compiler.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
    at org.drools.compiler.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:405)
    at org.drools.compiler.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:46)
    at org.drools.compiler.compiler.PackageRegistry.compileAll(PackageRegistry.java:110)
    at org.drools.compiler.compiler.PackageBuilder.compileAll(PackageBuilder.java:1334)
    at org.drools.compiler.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:975)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.buildRules(CompositeKnowledgeBuilderImpl.java:266)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.buildPackages(CompositeKnowledgeBuilderImpl.java:98)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:87)
    at org.drools.compiler.kie.builder.impl.AbstractKieModule.buildKnowledgePackages(AbstractKieModule.java:204)
    at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:39)
    at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:323)
    at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:193)
    at com.local.lds.rules.RuleEngineManager.buildKieBase(RuleEngineManager.java:90)
    at com.local.lds.rules.LocmChiTest.<clinit>(LocmChiTest.java:33)
    ... 41 more
Caused by: org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException
    at org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader.<init>(ClassFileReader.java:372)
    at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler$2.createNameEnvironmentAnswer(EclipseJavaCompiler.java:303)
    at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:274)
    ... 82 more
testNoFeatured(com.local.lds.rules.LocmChiTest)  Time elapsed: 0 sec  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class com.local.lds.rules.LocmChiTest
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187)
    at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invoke(MethodReflection.java:63)
    at mockit.Invocation.proceed(Invocation.java:192)
    at mockit.integration.junit4.internal.BlockJUnit4ClassRunnerDecorator.createTest(BlockJUnit4ClassRunnerDecorator.java:59)
    at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invokeWithCheckedThrows(MethodReflection.java:95)
    at mockit.internal.mockups.MockMethodBridge.callMock(MockMethodBridge.java:75)
    at mockit.internal.mockups.MockMethodBridge.invoke(MockMethodBridge.java:41)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java)
    at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
    at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
    at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
testFeaturedSort(com.local.lds.rules.LocmChiTest)  Time elapsed: 0.001 sec  <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class com.local.lds.rules.LocmChiTest
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187)
    at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invoke(MethodReflection.java:63)
    at mockit.Invocation.proceed(Invocation.java:192)
    at mockit.integration.junit4.internal.BlockJUnit4ClassRunnerDecorator.createTest(BlockJUnit4ClassRunnerDecorator.java:59)
    at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at mockit.internal.util.MethodReflection.invokeWithCheckedThrows(MethodReflection.java:95)
    at mockit.internal.mockups.MockMethodBridge.callMock(MockMethodBridge.java:75)
    at mockit.internal.mockups.MockMethodBridge.invoke(MockMethodBridge.java:41)
    at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java)
    at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
    at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
    at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)

Entonces, ¿este es un problema con Java 8, Maven, el complemento Surefire o Drools?

Answer 1

Actualice org.eclipse.jdt.core.jar al último disponible.

En nuestro caso, hemos actualizado org.eclipse.jdt.core-3.5.1.v_972_R35x.jar a org.eclipse.jdt.core_3.11.2.v20160128-0629.jar.

Este es el jar que decide la versión de java con la que se compilará el código de drools.

una vez que está instalado el antiguo código de drools compatible con java-6 se está compilando en java -8. u puede ejecutarlo utilizando java -8 sin ningún tipo de error. Estos son pasos comprobados. Por favor, vuelva si tiene alguna duda.

Answer 2

Actualice su org.eclipse.jdt.internal.compiler (ecj.jar) a la última versión, use ecj-4.4.jar e intente.

Answer 3

ECJ, que se usa para compilar el código Java en sus reglas, solo comenzó a admitir la sintaxis de Java 8 recientemente con Luna (4.4), por lo que se requiere una actualización.

Si desea usar la sintaxis de Java 8 en sus reglas, también querrá usar Drools 6.4.0.Final, ya que ahora reconocen Java 8 como Java 8 (se asignaron 8 a 7 para solucionar problemas con ECJ 4.3)

La versión MVEL 2.2.X o posterior, que es una abreviatura alternativa a la sintaxis de Java, también admite Java 8.

Answer 4

He resuelto este problema editando pom en maven.

    <dependency>
        <groupId>org.eclipse.jdt.core.compiler</groupId>
        <artifactId>ecj</artifactId>
        <version>4.5.1</version>
    </dependency>

    <!-- core -->
    <dependency>
        <groupId>org.drools</groupId>
        <artifactId>drools-core</artifactId>
        <version>5.5.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.drools</groupId>
        <artifactId>drools-compiler</artifactId>
        <version>5.5.0.Final</version>
        <exclusions>
            <exclusion>
                <groupId>org.eclipse.jdt.core.compiler</groupId>
                <artifactId>ecj</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

Answer 5

Parece un error en Drools (en el compilador de Eclipse que es el predeterminado):

• Bugzilla
• issues.jboss.org/browse/DROOLS-329 (gracias Laune)

Están buscando arreglarlo en 6.1.0.Beta2 .

Mientras tanto, intente esta solución : ecj dependencia de ecj a la versión 4.3.1 .