java.lang.VerifyError

[liebig....@googlemail.com]

I'm using Stardog 2.2.2 on OS X with Java 1.8/1.7

When trying to run one of the shipped examples (e.g. the ReasoningExample) I'll get the following error:

...

Exception in thread "main" java.lang.VerifyError: class com.complexible.barc.Protocol$BigPacket overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet;

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:800)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)

at java.net.URLClassLoader.access$100(URLClassLoader.java:71)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

at java.lang.ClassLoader.loadClass(ClassLoader.java:425)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

at java.lang.Class.getDeclaredMethods0(Native Method)

at java.lang.Class.privateGetDeclaredMethods(Class.java:2531)

at java.lang.Class.getDeclaredMethods(Class.java:1855)

at com.google.inject.spi.InjectionPoint.getInjectionPoints(InjectionPoint.java:662)

at com.google.inject.spi.InjectionPoint.forInstanceMethodsAndFields(InjectionPoint.java:356)

at com.google.inject.assistedinject.FactoryProvider2.getDependencies(FactoryProvider2.java:465)

at com.google.inject.assistedinject.FactoryProvider2.<init>(FactoryProvider2.java:255)

at com.google.inject.assistedinject.FactoryModuleBuilder$1.configure(FactoryModuleBuilder.java:334)

at com.google.inject.AbstractModule.configure(AbstractModule.java:59)

at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)

at com.google.inject.AbstractModule.install(AbstractModule.java:118)

at com.complexible.barc.BarcModule.configure(BarcModule.java:52)

at com.google.inject.AbstractModule.configure(AbstractModule.java:59)

at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)

at com.google.inject.AbstractModule.install(AbstractModule.java:118)

at com.complexible.stardog.protocols.snarl.server.SNARLServerModule.configure(SNARLServerModule.java:34)

at com.google.inject.AbstractModule.configure(AbstractModule.java:59)

at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)

at com.google.inject.spi.Elements.getElements(Elements.java:101)

at com.google.inject.spi.Elements.getElements(Elements.java:92)

at com.google.inject.util.Modules$RealOverriddenModuleBuilder$1.configure(Modules.java:172)

at com.google.inject.AbstractModule.configure(AbstractModule.java:59)

at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)

at com.google.inject.spi.Elements.getElements(Elements.java:101)

at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:133)

at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:103)

at com.google.inject.Guice.createInjector(Guice.java:95)

at com.google.inject.Guice.createInjector(Guice.java:72)

at com.google.inject.Guice.createInjector(Guice.java:62)

at com.complexible.stardog.Stardog.<init>(Stardog.java:162)

at com.complexible.stardog.Stardog.initialize(Stardog.java:260)

at com.complexible.stardog.Stardog.initialize(Stardog.java:251)

at com.complexible.stardog.Stardog.buildServer(Stardog.java:244)

at com.complexible.stardog.examples.api.ReasoningExample.main(ReasoningExample.java:51)

Google tells me that this could be caused because of a versioning problem. Any hints?

Best

Thorsten

[Mike Grove]

You mentioned both Java 7 & 8.  Could it be the case that the build wasn't cleaned between versions and some files were compiled w/ one version and some with the other?

If you do a clean build, does the problem persist?

Cheers,

Mike

 

Best

Thorsten

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[Mike Grove]

Also, the examples are provided on GitHub [1], and come with an Ant script to compile them.

Cheers,

Mike

[1] https://github.com/clarkparsia/stardog-examples

[liebig....@googlemail.com]

Ok, I updated all my tools (such as ant, etc.) and somehow solved the problem. I can now execute the examples via ant as well as within my IDE.

Thanks

Thorsten