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    Thrown if an application attempts to access or modify a field, or to call a method or interface it does not have access to. Can also occur if the two classes are compiled with different compiler version so the interface and its implementation don't match.

Solutions on the web

via JBoss Issue Tracker by Antonin Stefanutti, 1 year ago
WELD-001524: Unable to load proxy class for bean Managed Bean [class io.astefanutti.metrics.cdi.MetricProducer] with qualifiers [@Any @Default] with class class io.astefanutti.metrics.cdi.MetricProducer using classloader BundleClassLoader{bundle
via Stack Overflow by Kawu
, 2 years ago
duplicate method: getTargetClass in de.bnext.compliance.compliancerulemgmt.view.ComplianceRuleDocumentationManager$Proxy$_$$_WeldClientProxy
via GitHub by webjoel
, 4 days ago
WELD-001524: Unable to load proxy class for bean WELD%AbstractBuiltInBean%app-ear.ear/app-web-service.war/WEB-INF/classes%HttpServletRequest with class class java.lang.Object using classloader ModuleClassLoader for Module "org.jboss.weld.core:main
org.jboss.weld.exceptions.WeldException: WELD-001524: Unable to load proxy class for bean Managed Bean [class io.astefanutti.metrics.cdi.MetricProducer] with qualifiers [@Any @Default] with class class io.astefanutti.metrics.cdi.MetricProducer using classloader BundleClassLoader{bundle=[DelegatingBundle: [io.astefanutti.camel.cdi.camel-cdi-sample-metrics [15], org.ops4j.pax.cdi.weld [87], org.jboss.weld.osgi-bundle [73], io.astefanutti.camel.cdi.camel-cdi [14], io.astefanutti.metrics.cdi.metrics-cdi [16]]],parent=null} at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:364) at org.jboss.weld.bean.proxy.ProxyFactory.run(ProxyFactory.java:327) at org.jboss.weld.bean.proxy.ProxyFactory.create(ProxyFactory.java:319) at org.jboss.weld.bean.proxy.ClientProxyFactory.create(ClientProxyFactory.java:83) at org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:198) at org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:188) at org.jboss.weld.bean.proxy.ClientProxyProvider.access$100(ClientProxyProvider.java:46) at org.jboss.weld.bean.proxy.ClientProxyProvider$CreateClientProxy.load(ClientProxyProvider.java:57) at org.jboss.weld.bean.proxy.ClientProxyProvider$CreateClientProxy.load(ClientProxyProvider.java:53) at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319) at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197) at com.google.common.cache.LocalCache.get(LocalCache.java:3937) at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941) at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824) at org.jboss.weld.util.cache.LoadingCacheUtils.getCacheValue(LoadingCacheUtils.java:49) at org.jboss.weld.util.cache.LoadingCacheUtils.getCastCacheValue(LoadingCacheUtils.java:74) at org.jboss.weld.bean.proxy.ClientProxyProvider.getClientProxy(ClientProxyProvider.java:222) at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:736) at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:765) at org.jboss.weld.util.ForwardingBeanManager.getReference(ForwardingBeanManager.java:61) at org.jboss.weld.bean.builtin.BeanManagerProxy.getReference(BeanManagerProxy.java:85) at io.astefanutti.metrics.cdi.MetricsExtension.getBeanInstance(MetricsExtension.java:123) at io.astefanutti.metrics.cdi.MetricsExtension.configuration(MetricsExtension.java:99) 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:606) at org.jboss.weld.injection.StaticMethodInjectionPoint.invoke(StaticMethodInjectionPoint.java:88) at org.jboss.weld.injection.MethodInvocationStrategy$SpecialParamPlusBeanManagerStrategy.invoke(MethodInvocationStrategy.java:144) at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:309) at org.jboss.weld.event.ExtensionObserverMethodImpl.sendEvent(ExtensionObserverMethodImpl.java:124) at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:287) at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:265) at org.jboss.weld.event.ObserverNotifier.notifySyncObservers(ObserverNotifier.java:271) at org.jboss.weld.event.ObserverNotifier.notify(ObserverNotifier.java:260) at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:154) at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:148) at org.jboss.weld.bootstrap.events.AbstractContainerEvent.fire(AbstractContainerEvent.java:53) at org.jboss.weld.bootstrap.events.AbstractDeploymentContainerEvent.fire(AbstractDeploymentContainerEvent.java:35) at org.jboss.weld.bootstrap.events.AfterDeploymentValidationImpl.fire(AfterDeploymentValidationImpl.java:28) at org.jboss.weld.bootstrap.WeldStartup.validateBeans(WeldStartup.java:450) at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:90) at org.ops4j.pax.cdi.weld.impl.WeldCdiContainer.createBeanManager(WeldCdiContainer.java:115) at org.ops4j.pax.cdi.weld.impl.WeldCdiContainer.access$000(WeldCdiContainer.java:55) at org.ops4j.pax.cdi.weld.impl.WeldCdiContainer$1.call(WeldCdiContainer.java:95) at org.ops4j.pax.cdi.weld.impl.WeldCdiContainer$1.call(WeldCdiContainer.java:91) at org.ops4j.pax.swissbox.core.ContextClassLoaderUtils.doWithClassLoader(ContextClassLoaderUtils.java:60) at org.ops4j.pax.cdi.weld.impl.WeldCdiContainer.doStart(WeldCdiContainer.java:91) at org.ops4j.pax.cdi.spi.AbstractCdiContainer.start(AbstractCdiContainer.java:87) at org.ops4j.pax.cdi.extender.impl.CdiExtender.createContainer(CdiExtender.java:184) at org.ops4j.pax.cdi.extender.impl.CdiExtender.addingBundle(CdiExtender.java:133) at org.ops4j.pax.cdi.extender.impl.CdiExtender.addingBundle(CdiExtender.java:64) at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:469) at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:415) at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229) at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444) at org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:916) at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:835) at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:517) at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4541) at org.apache.felix.framework.Felix.startBundle(Felix.java:2172) at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998) at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984) at org.apache.karaf.features.internal.service.FeaturesServiceImpl.startBundle(FeaturesServiceImpl.java:1189) at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:836) at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1079) at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:975) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.RuntimeException: java.lang.IllegalAccessError: class io.astefanutti.metrics.cdi.MetricProducer$Proxy$_$$_WeldClientProxy cannot access its superclass io.astefanutti.metrics.cdi.MetricProducer at org.jboss.weld.util.bytecode.ClassFileUtils.toClass(ClassFileUtils.java:101) at org.jboss.weld.bean.proxy.ProxyFactory.createProxyClass(ProxyFactory.java:484) at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:357) ... 73 moreCaused by: java.lang.IllegalAccessError: class io.astefanutti.metrics.cdi.MetricProducer$Proxy$_$$_WeldClientProxy cannot access its superclass io.astefanutti.metrics.cdi.MetricProducer at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) 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:606) at org.jboss.weld.util.bytecode.ClassFileUtils.toClass2(ClassFileUtils.java:108) at org.jboss.weld.util.bytecode.ClassFileUtils.toClass(ClassFileUtils.java:97) ... 75 more