[KARAF-5086] Java 8 default methods cause IncompatibleClassChangeError in blueprint

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 4.0.7
• Fix Version/s: 4.2.3
• Assignee: Jean-Baptiste Onofré
• Reporter: Michael Vorburger
• Created: 09/Apr/17 04:03
• Updated: 17/Jan/19 20:37
• Resolved: 17/Jan/19 20:37

Description

I have an interface with a default method and an implementation of that is exposed as an OSGi service via Aries Blueprint, and when the default method is called, it's causing this error:

IncompatibleClassChangeError: Found interface org.opendaylight.infrautils.caches.CacheProvider, but class was expected. at Proxy*.newCache()

The code looks something like this:

public interface CacheProvider {

    <K,V> Cache<K,V> newCache(CacheConfig<K,V> cacheConfig, CachePolicy initialPolicy);

    default <K,V> Cache<K,V> newCache(CacheConfig<K,V> cacheConfig) {
        return newCache(cacheConfig, new CachePolicyBuilder().build());
    }

And here's the full stack trace:

opendaylight-user@root>diag
caches-sample (57)
------------------
Status: Failure
Blueprint
9/4/17 5:35 AM
Exception: 
org.osgi.service.blueprint.container.ComponentDefinitionException: Error when instantiating bean sampleServiceWithCachingImpl of class org.opendaylight.infrautils.caches.sample.SampleServiceWithCachingImpl
org.osgi.service.blueprint.container.ComponentDefinitionException: org.osgi.service.blueprint.container.ComponentDefinitionException: Error when instantiating bean sampleServiceWithCachingImpl of class org.opendaylight.infrautils.caches.sample.SampleServiceWithCachingImpl
	at org.apache.aries.blueprint.container.ServiceRecipe.createService(ServiceRecipe.java:310)
	at org.apache.aries.blueprint.container.ServiceRecipe.internalGetService(ServiceRecipe.java:252)
	at org.apache.aries.blueprint.container.ServiceRecipe.internalCreate(ServiceRecipe.java:149)
	at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)
	at org.apache.aries.blueprint.container.BlueprintRepository.createInstances(BlueprintRepository.java:255)
	at org.apache.aries.blueprint.container.BlueprintRepository.createAll(BlueprintRepository.java:186)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.instantiateEagerComponents(BlueprintContainerImpl.java:724)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:411)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:276)
	at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:300)
	at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:269)
	at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:265)
	at org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:255)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher$2.call(EquinoxEventPublisher.java:189)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.notifyHookPrivileged(ServiceRegistry.java:1280)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.notifyHooksPrivileged(ServiceRegistry.java:1263)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.notifyEventHooksPrivileged(EquinoxEventPublisher.java:186)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:146)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:75)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:67)
	at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:102)
	at org.eclipse.osgi.container.Module.publishEvent(Module.java:466)
	at org.eclipse.osgi.container.Module.start(Module.java:457)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:392)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:411)
	at org.apache.karaf.features.internal.service.FeaturesServiceImpl.startBundle(FeaturesServiceImpl.java:1286)
	at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:846)
	at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1176)
	at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:1074)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.osgi.service.blueprint.container.ComponentDefinitionException: Error when instantiating bean sampleServiceWithCachingImpl of class org.opendaylight.infrautils.caches.sample.SampleServiceWithCachingImpl
	at org.apache.aries.blueprint.container.BeanRecipe.wrapAsCompDefEx(BeanRecipe.java:361)
	at org.apache.aries.blueprint.container.BeanRecipe.getInstanceFromType(BeanRecipe.java:351)
	at org.apache.aries.blueprint.container.BeanRecipe.getInstance(BeanRecipe.java:282)
	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:830)
	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:811)
	at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)
	at org.apache.aries.blueprint.di.RefRecipe.internalCreate(RefRecipe.java:62)
	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:106)
	at org.apache.aries.blueprint.container.ServiceRecipe.createService(ServiceRecipe.java:285)
	... 39 more
Caused by: java.lang.IncompatibleClassChangeError: Found interface org.opendaylight.infrautils.caches.CacheProvider, but class was expected
	at Proxye4b5f3d8_2a36_4067_b1b9_758c1f9fee27.newCache(Unknown Source)
	at org.opendaylight.infrautils.caches.sample.SampleServiceWithCachingImpl.<init>(SampleServiceWithCachingImpl.java:35)
	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:423)
	at org.apache.aries.blueprint.utils.ReflectionUtils.newInstance(ReflectionUtils.java:331)
	at org.apache.aries.blueprint.container.BeanRecipe.newInstance(BeanRecipe.java:984)
	at org.apache.aries.blueprint.container.BeanRecipe.getInstanceFromType(BeanRecipe.java:349)
	... 48 more

Issue Links

• is blocked by: ARIES-1849 Aries proxy does not work with interface default methods
• is blocked by: KARAF-6087 Upgrade to Aries Proxy Impl 1.1.4