Karaf log often has a log of these - I wonder if we could fix this:

2016-08-24 13:11:51,827 | INFO | erRestartService | ServiceRecipe | 15 - org.apache.aries.blueprint.core - 1.6.1 | Unable to create a proxy object for the service .component-1 defined in bundle org.opendaylight.controller.sal-binding-broker-impl/1.5.0.SNAPSHOT with id. Returning the original object instead.
org.apache.aries.proxy.UnableToProxyException: java.lang.ClassFormatError: Duplicate interface name in class file Proxy6fd82926_da09_440b_a855_3bb75f7801bd
at org.apache.aries.proxy.impl.interfaces.ProxyClassLoader.createProxyClass(ProxyClassLoader.java:165)
at org.apache.aries.proxy.impl.interfaces.InterfaceProxyGenerator.getProxyInstance(InterfaceProxyGenerator.java:97)[12:org.apache.aries.proxy.impl:1.0.5]
at org.apache.aries.proxy.impl.AsmProxyManager.createNewProxy(AsmProxyManager.java:80)[12:org.apache.aries.proxy.impl:1.0.5]
at org.apache.aries.proxy.impl.AbstractProxyManager.createDelegatingInterceptingProxy(AbstractProxyManager.java:75)[12:org.apache.aries.proxy.impl:1.0.5]
at org.apache.aries.proxy.impl.AbstractProxyManager.createInterceptingProxy(AbstractProxyManager.java:53)[12:org.apache.aries.proxy.impl:1.0.5]
at org.apache.aries.blueprint.container.ServiceRecipe$TriggerServiceFactory.getService(ServiceRecipe.java:569)
at org.eclipse.osgi.internal.serviceregistry.ServiceUse$1.run(ServiceUse.java:141)
at java.security.AccessController.doPrivileged(Native Method)[:1.8.0_101]
at org.eclipse.osgi.internal.serviceregistry.ServiceUse.getService(ServiceUse.java:139)[org.eclipse.osgi-3.8.2.v20130124-134944.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:468)[org.eclipse.osgi-3.8.2.v20130124-134944.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:467)[org.eclipse.osgi-3.8.2.v20130124-134944.jar:]
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.getService(BundleContextImpl.java:594)[org.eclipse.osgi-3.8.2.v20130124-134944.jar:]
at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.getServiceSecurely(AbstractServiceReferenceRecipe.java:235)[15:org.apache.aries.blueprint.core:1.6.1]
at org.opendaylight.controller.blueprint.ext.StaticServiceReferenceRecipe.internalCreate(StaticServiceReferenceRecipe.java:113)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.opendaylight.controller.blueprint.ext.StaticServiceReferenceRecipe.retrack(StaticServiceReferenceRecipe.java:79)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.start(AbstractServiceReferenceRecipe.java:140)[15:org.apache.aries.blueprint.core:1.6.1]
at org.opendaylight.controller.blueprint.ext.StaticServiceReferenceRecipe.startTracking(StaticServiceReferenceRecipe.java:50)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.opendaylight.controller.blueprint.ext.AbstractDependentComponentFactoryMetadata.retrieveService(AbstractDependentComponentFactoryMetadata.java:108)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.opendaylight.controller.blueprint.ext.AbstractDependentComponentFactoryMetadata.retrieveService(AbstractDependentComponentFactoryMetadata.java:99)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.opendaylight.controller.blueprint.ext.DataStoreAppConfigMetadata.startTracking(DataStoreAppConfigMetadata.java:172)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.opendaylight.controller.blueprint.ext.AbstractDependentComponentFactoryMetadata.startTracking(AbstractDependentComponentFactoryMetadata.java:173)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at org.apache.aries.blueprint.di.DependentComponentFactoryRecipe.start(DependentComponentFactoryRecipe.java:55)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintContainerImpl.trackServiceReferences(BlueprintContainerImpl.java:636)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:360)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:276)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:300)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:269)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintExtender.access$900(BlueprintExtender.java:68)[15:org.apache.aries.blueprint.core:1.6.1]
at org.apache.aries.blueprint.container.BlueprintExtender$BlueprintContainerServiceImpl.createContainer(BlueprintExtender.java:602)[15:org.apache.aries.blueprint.core:1.6.1]
at org.opendaylight.controller.blueprint.BlueprintContainerRestartServiceImpl$1.run(BlueprintContainerRestartServiceImpl.java:89)[179:org.opendaylight.controller.blueprint:0.6.0.SNAPSHOT]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_101]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_101]
Caused by: java.lang.ClassFormatError: Duplicate interface name in class file Proxy6fd82926_da09_440b_a855_3bb75f7801bd
at java.lang.ClassLoader.defineClass1(Native Method)[:1.8.0_101]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)[:1.8.0_101]
at org.apache.aries.proxy.impl.interfaces.ProxyClassLoader.createProxyClass(ProxyClassLoader.java:157)
... 32 more