VerifyError : Bad access to protected data when using clone() method in rules

[Michael Petritsch]

Hi,

I've added a clone method to our OpenEngSBModels for convenience,
however when I want to use this method in a drools rule I am getting
the following error:

2013-03-27 18:33:55,262 | ERROR | 6.0-SNAPSHOT/etc | fileinstall
| 15 - org.apache.felix.fileinstall - 3.2.6 | In main
loop, we have serious trouble
java.lang.VerifyError: (class:
org/openengsb/UpdateDeleteTransformPlcToElp, method:
updateDeleteTransformPlcToElp signature:
(Ljava/util/List;Lorg/openengsb/core/ekb/api/TransformationEngine;Lorg/openengsb/core/ekb/api/QueryInterface;)Ljava/util/List;)
Bad access to protected data
at java.lang.Class.getDeclaredFields0(Native Method)[:1.7.0_17]
at java.lang.Class.privateGetDeclaredFields(Class.java:2317)[:1.7.0_17]
at java.lang.Class.getDeclaredFields(Class.java:1762)[:1.7.0_17]
at org.codehaus.janino.ReflectionIClass.getDeclaredIFields2(ReflectionIClass.java)
at org.codehaus.janino.IClass.getDeclaredIFields(IClass.java)
at org.codehaus.janino.UnitCompiler.import2(UnitCompiler.java)
at org.codehaus.janino.UnitCompiler.access$2(UnitCompiler.java)
at org.codehaus.janino.UnitCompiler$2.visitSingleStaticImportDeclaration(UnitCompiler.java)
at org.codehaus.janino.Java$CompilationUnit$SingleStaticImportDeclaration.accept(Java.java)
at org.codehaus.janino.UnitCompiler.compileUnit(UnitCompiler.java)
at org.codehaus.janino.Compiler.compile(Compiler.java)
at org.drools.commons.jci.compilers.JaninoJavaCompiler.compile(JaninoJavaCompiler.java:171)
at org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
at org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:408)
at org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:46)
at org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:102)
at org.jbpm.compiler.ProcessBuilderImpl.buildProcess(ProcessBuilderImpl.java:175)
at org.jbpm.compiler.ProcessBuilderImpl.addProcessFromXml(ProcessBuilderImpl.java:267)
at org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:673)
at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:706)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
at org.openengsb.core.workflow.drools.internal.RulebaseBuilder.compileDrlString(RulebaseBuilder.java:206)
at org.openengsb.core.workflow.drools.internal.RulebaseBuilder.reloadPackage(RulebaseBuilder.java:146)
at org.openengsb.core.workflow.drools.internal.persistence.PersistenceRuleManager.update(PersistenceRuleManager.java:107)
at org.openengsb.core.workflow.drools.internal.AbstractRuleManager.addOrUpdate(AbstractRuleManager.java:72)
at org.openengsb.core.workflow.drools.internal.WorkflowDeployerService.installRuleBaseElement(WorkflowDeployerService.java:208)
at org.openengsb.core.workflow.drools.internal.WorkflowDeployerService.doInstall(WorkflowDeployerService.java:163)
at org.openengsb.core.workflow.drools.internal.WorkflowDeployerService.install(WorkflowDeployerService.java:112)
at Proxy75c7a8e6_34d1_4613_bcd9_13b97b40bd58.install(Unknown Source)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.install(DirectoryWatcher.java:929)[15:org.apache.felix.fileinstall:3.2.6]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.install(DirectoryWatcher.java:857)[15:org.apache.felix.fileinstall:3.2.6]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:483)[15:org.apache.felix.fileinstall:3.2.6]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:291)[15:org.apache.felix.fileinstall:3.2.6]

The error is definitely linked to the clone() method. I have found a
similar issue in JASSIST [1].

according to mvn dependency:tree you are using JASSIST in:
[INFO] ------------------------------------------------------------------------
[INFO] Building OpenEngSB :: Framework :: Weaver Service 3.0.0-cdlflex-25
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.4:tree (default-cli) @
org.openengsb.framework.weaver.service ---
[INFO] org.openengsb.framework:org.openengsb.framework.weaver.service:bundle:3.0.0-cdlflex-25
[INFO] +- org.osgi:org.osgi.core:jar:4.3.1:compile
[INFO] +- org.apache.servicemix.bundles:org.apache.servicemix.bundles.javassist:jar:3.12.1.GA_3:compile


could this be connected? should have been fixed 3.12.1.GA_3 though as
that was released somewhere after 2010 and the issue was closed 2008.

br

[1] https://issues.jboss.org/browse/JASSIST-60

[Felix Mayerhuber]

Hi,

so this exception is only thrown when you added the clone method?

I don't know how you implemented this method, but I suppose it has
something to do with the things written here:
http://www.coderanch.com/t/328067/java/java/VerifyError-Bad-access-protected-data
?

It is also possible that it has something to do with janino (since it is
the first non JRE specific element in the exception tree).

Kind regards,
Felix

[Michael Petritsch]

ok, nevermind lol, was using the wrong version of the model (which
didn't have the overridden clone() method).

br

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