Skip static method in interface when creating proxy.

[chickenlj]

[18/06/19 16:06:03:822 CST] main ERROR support.ServiceOrientedRegistry:  [DUBBO] [source error] not available in a static method: handler, dubbo version: , current host: 30.5.121.48
java.lang.RuntimeException: [source error] not available in a static method: handler
	at org.apache.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:348)
	at org.apache.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:287)
	at org.apache.dubbo.common.bytecode.Proxy.getProxy(Proxy.java:192)
	at org.apache.dubbo.common.bytecode.Proxy.getProxy(Proxy.java:66)
	at org.apache.dubbo.rpc.proxy.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:35)
	at org.apache.dubbo.rpc.proxy.AbstractProxyFactory.getProxy(AbstractProxyFactory.java:68)
	at org.apache.dubbo.rpc.proxy.AbstractProxyFactory.getProxy(AbstractProxyFactory.java:37)
	at org.apache.dubbo.rpc.proxy.wrapper.StubProxyFactoryWrapper.getProxy(StubProxyFactoryWrapper.java:72)
	at org.apache.dubbo.rpc.ProxyFactory$Adaptive.getProxy(ProxyFactory$Adaptive.java)
	at org.apache.dubbo.registry.client.metadata.proxy.DefaultMetadataServiceProxyFactory.createProxy(DefaultMetadataServiceProxyFactory.java:71)
	at org.apache.dubbo.registry.client.metadata.proxy.DefaultMetadataServiceProxyFactory.lambda$getProxy$0(DefaultMetadataServiceProxyFactory.java:61)
	at java.util.HashMap.computeIfAbsent(HashMap.java:1126)
	at org.apache.dubbo.registry.client.metadata.proxy.DefaultMetadataServiceProxyFactory.getProxy(DefaultMetadataServiceProxyFactory.java:61)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.getProviderExportedURLs(ServiceOrientedRegistry.java:403)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.getTemplateURLs(ServiceOrientedRegistry.java:377)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.getSubscribedURLs(ServiceOrientedRegistry.java:253)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.subscribeURLs(ServiceOrientedRegistry.java:228)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.subscribeURLs(ServiceOrientedRegistry.java:212)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.lambda$subscribeURLs$0(ServiceOrientedRegistry.java:204)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.subscribeURLs(ServiceOrientedRegistry.java:204)
	at org.apache.dubbo.registry.support.ServiceOrientedRegistry.doSubscribe(ServiceOrientedRegistry.java:178)
	at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:295)
	at org.apache.dubbo.registry.integration.RegistryDirectory.subscribe(RegistryDirectory.java:172)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:410)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:391)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:69)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:128)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:414)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:345)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:261)
	at org.apache.dubbo.bootstrap.DubboServiceConsumerBootstrap.main(DubboServiceConsumerBootstrap.java:50)
Caused by: javassist.CannotCompileException: [source error] not available in a static method: handler
	at javassist.CtNewMethod.make(CtNewMethod.java:79)
	at javassist.CtNewMethod.make(CtNewMethod.java:45)
	at org.apache.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:323)
	... 33 more
Caused by: compile error: not available in a static method: handler
	at javassist.compiler.MemberCodeGen.fieldAccess(MemberCodeGen.java:1037)
	at javassist.compiler.MemberCodeGen.atFieldRead(MemberCodeGen.java:867)
	at javassist.compiler.MemberCodeGen.atMember(MemberCodeGen.java:862)
	at javassist.compiler.JvstCodeGen.atMember(JvstCodeGen.java:112)
	at javassist.compiler.ast.Member.accept(Member.java:39)
	at javassist.compiler.MemberCodeGen.atCallExpr(MemberCodeGen.java:510)
	at javassist.compiler.JvstCodeGen.atCallExpr(JvstCodeGen.java:244)
	at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)
	at javassist.compiler.CodeGen.atAssignCore(CodeGen.java:877)
	at javassist.compiler.CodeGen.atVariableAssign(CodeGen.java:810)
	at javassist.compiler.CodeGen.atDeclarator(CodeGen.java:744)
	at javassist.compiler.ast.Declarator.accept(Declarator.java:100)
	at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)
	at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
	at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)
	at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
	at javassist.compiler.CodeGen.atMethodBody(CodeGen.java:292)
	at javassist.compiler.CodeGen.atMethodDecl(CodeGen.java:274)
	at javassist.compiler.ast.MethodDecl.accept(MethodDecl.java:44)
	at javassist.compiler.Javac.compileMethod(Javac.java:169)
	at javassist.compiler.Javac.compile(Javac.java:95)
	at javassist.CtNewMethod.make(CtNewMethod.java:74)
	... 35 more

public java.lang.String version(){Object[] args = new Object[0]; Object ret = handler.invoke(this, methods[0], args); return (java.lang.String)ret;}

public java.lang.String serviceName(){Object[] args = new Object[0]; Object ret = handler.invoke(this, methods[1], args); return (java.lang.String)ret;}

public static java.util.List toURLs(java.lang.Iterable arg0){Object[] args = new Object[1]; args[0] = (w)1; Object ret = handler.invoke(this, methods[2], args); return (java.util.List)ret;}

[cvictory]

It will be fixed in 2.7.5 that is merged from cloud-native branch.