wuguanyu opened a new issue #7824: URL: https://github.com/apache/skywalking/issues/7824
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/skywalking/issues?q=is%3Aissue) and found no similar issues. ### Apache SkyWalking Component Java Agent (apache/skywalking-java) ### What happened ``` java.lang.IllegalArgumentException: Cannot resolve ambiguous delegation of protected abstract java.lang.Object com.netflix.hystrix.HystrixCommand.run() throws java.lang.Exception to public java.lang.String java.lang.Object.toString() or public native int java.lang.Object.hashCode() at org.apache.skywalking.apm.dependencies.net.bytebuddy.implementation.bind.MethodDelegationBinder$BindingResolver$Default.doResolve(MethodDelegationBinder.java:662) at org.apache.skywalking.apm.dependencies.net.bytebuddy.implementation.bind.MethodDelegationBinder$BindingResolver$Default.resolve(MethodDelegationBinder.java:611) at org.apache.skywalking.apm.dependencies.net.bytebuddy.implementation.bind.MethodDelegationBinder$Processor.bind(MethodDelegationBinder.java:1098) at org.apache.skywalking.apm.dependencies.net.bytebuddy.implementation.MethodDelegation$Appender.apply(MethodDelegation.java:1346) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyCode(TypeWriter.java:708) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyBody(TypeWriter.java:693) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod.apply(TypeWriter.java:600) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining$WithFullProcessing$RedefinitionClassVisitor.onVisitEnd(TypeWriter.java:5110) at org.apache.skywalking.apm.dependencies.net.bytebuddy.utility.visitor.MetadataAwareClassVisitor.visitEnd(MetadataAwareClassVisitor.java:370) at org.apache.skywalking.apm.dependencies.net.bytebuddy.jar.asm.ClassReader.accept(ClassReader.java:715) at org.apache.skywalking.apm.dependencies.net.bytebuddy.jar.asm.ClassReader.accept(ClassReader.java:394) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:3892) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2166) at org.apache.skywalking.apm.dependencies.net.bytebuddy.dynamic.scaffold.inline.RebaseDynamicTypeBuilder.make(RebaseDynamicTypeBuilder.java:250) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.doTransform(AgentBuilder.java:10371) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:10307) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.access$1600(AgentBuilder.java:10073) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$Java9CapableVmDispatcher.run(AgentBuilder.java:10766) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$Java9CapableVmDispatcher.run(AgentBuilder.java:10704) at java.security.AccessController.doPrivileged(AccessController.java) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:10263) at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$ByteBuddy$ModuleSupport.transform at sun.instrument.TransformerManager.transform(TransformerManager.java:188) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:563) at java.lang.ClassLoader.defineClass1(ClassLoader.java) at java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.net.URLClassLoader.defineClass(URLClassLoader.java:550) at java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.security.AccessController.doPrivileged(AccessController.java) at java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.lang.ClassLoader.loadClass(ClassLoader.java:588) at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93) at java.lang.ClassLoader.loadClass(ClassLoader.java:521) at java.lang.ClassLoader.defineClass1(ClassLoader.java) at java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.net.URLClassLoader.defineClass(URLClassLoader.java:550) at java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.security.AccessController.doPrivileged(AccessController.java) at java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.lang.ClassLoader.loadClass(ClassLoader.java:588) at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93) at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ``` ### What you expected to happen no exception ### How to reproduce When i use the following java code,the exception occcured in bytebuddy I extend HystrixCommand class and add new constructor in child class ``` public abstract class MyselfHystrixCommand extends HystrixCommand { private final String myselfHystrixCommandCommandKey; /** */ protected RedisHystrixCommand(String myselfHystrixCommandCommandKey) { super(Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey("wuguanyu"))); this.redisCommandKey = redisCommandKey; } } public class MyselfHystrixCommand2 extends MyselfHystrixCommand { protected MyselfHystrixCommand2(String myselfHystrixCommandCommandKey) { super(myselfHystrixCommandCommandKey); } @Override protected Object run() throws Exception { return null; } } ``` ### Anything else no ### Are you willing to submit PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. 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