Uploaded image for project: 'Drools'
  1. Drools
  2. DROOLS-329

ClassFormatException when compile template with latest JDK8 (b114)

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • Major
    • 5.5.1.Final, 6.3.0.CR1
    • 5.5.0.Final, 6.0.0.CR5
    • None
    • None
    • Hide

      Use Janino compiler, which can be done with these steps:

      • Add -Ddrools.dialect.java.compiler=JANINO to JVM System properties
      • Add Janino to classpath. With maven it can be done by adding this dependency into pom.xml: 
        <dependency>
  <groupId>org.codehaus.janino</groupId>
  <artifactId>janino</artifactId>
  <version>2.5.16</version>
 </dependency>
      Show
      Use Janino compiler, which can be done with these steps: Add -Ddrools.dialect.java.compiler=JANINO to JVM System properties Add Janino to classpath. With maven it can be done by adding this dependency into pom.xml: <dependency> <groupId>org.codehaus.janino</groupId> <artifactId>janino</artifactId> <version>2.5.16</version> </dependency>

    Description

      When trying to run code for compile templates with latest JDK8 (For instance this example https://github.com/droolsjbpm/drools/blob/master/drools-examples/src/main/java/org/drools/examples/templates/SimpleRuleTemplateExample.java )
      it will throw an exception like this:

      Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: wrong class format
	at org.drools.template.parser.DefaultTemplateRuleBase.readRule(DefaultTemplateRuleBase.java:148)
	at org.drools.template.parser.DefaultTemplateRuleBase.<init>(DefaultTemplateRuleBase.java:62)
	at org.drools.template.parser.TemplateDataListener.<init>(TemplateDataListener.java:74)
	at org.drools.decisiontable.ExternalSpreadsheetCompiler.compile(ExternalSpreadsheetCompiler.java:95)
	at org.drools.decisiontable.ExternalSpreadsheetCompiler.compile(ExternalSpreadsheetCompiler.java:81)
	at org.drools.examples.templates.SimpleRuleTemplateExample.buildKBase(SimpleRuleTemplateExample.java:84)
	at org.drools.examples.templates.SimpleRuleTemplateExample.executeExample(SimpleRuleTemplateExample.java:49)
	at org.drools.examples.templates.SimpleRuleTemplateExample.main(SimpleRuleTemplateExample.java:43)
	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:483)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.RuntimeException: wrong class format
	at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:263)
	at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:203)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:102)
	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.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1188)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromVariantTypeSignature(LookupEnvironment.java:1244)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeArgumentsFromSignature(LookupEnvironment.java:1031)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1193)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethod(BinaryTypeBinding.java:495)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethods(BinaryTypeBinding.java:577)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:327)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:640)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:619)
	at org.eclipse.jdt.internal.compiler.Compiler.accept(Compiler.java:295)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:133)
	at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:183)
	at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:465)
	at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:519)
	at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:368)
	at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInTypes(CompilationUnitScope.java:444)
	at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:752)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:464)
	at org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:389)
	at org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
	at org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:371)
	at org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:46)
	at org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:102)
	at org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:1006)
	at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:842)
	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:831)
	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:441)
	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:419)
	at org.drools.template.parser.DefaultTemplateRuleBase.readRule(DefaultTemplateRuleBase.java:139)
	... 12 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.commons.jci.compilers.EclipseJavaCompiler$2.createNameEnvironmentAnswer(EclipseJavaCompiler.java:287)
	at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:258)
	... 45 more

      Workaround, which worked for me is to switch to Janino compiler (See Workaround description)

      Attachments

        Issue Links

          relates to

          Bug - A problem that impairs or prevents the functions of the product. JBPAPP-11145 Seam 2.2 Drools doesn't work with Java 8

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Resolved

          Activity

            People

              mfusco@redhat.com Mario Fusco
              mposolda@redhat.com Marek Posolda
              Votes:
              8 Vote for this issue
              Watchers:
              16 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: