Issue 1:
I have searched the issues of this repository and believe that this is not a duplicate.

I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

Dubbo version: 2.6.5

Operating System version: mac

Java version: 1.8

Steps to reproduce this issue

官方网站只是简单的说了dubbo集成skywalking,实际有很多细节，skywalking5.x和6.x的配置有很多差异的地方，希望能够稍微详细点说明。

Issue 2:
I have searched the issues of this repository and believe that this is not a duplicate.

I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

Dubbo version: 2.7.7

Dubbo-Admin version: 最新版本

Operating System version: 10.15.5

Java version: OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_252-b09)

OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.252-b09, mixed mode)

Steps to reproduce this issue

创建一个接口与一个方法，方法入参为一个对象(内部有引用自身的范型类型)，如下：

`class Person implements Serializable {

private List persons;

//get/set

}

interface GreetingService {

Person testPerson(Person person);

}`

使用dubbo-admin，进入服务测试

会在解析persons属性时导致java.lang.StackOverflowError

Pls. provide [GitHub address] to reproduce this issue.

Expected Result

输出正确的结果

Actual Result

在解析List范型类型时，每次会从ServiceDefinition中获取已经存在的Person，而Person又包含有List属性，从而导致java.lang.StackOverflowError异常

If there is an exception, please attach the exception trace:

java.lang.StackOverflowError
at java.util.regex.Pattern$CharProperty.match(Pattern.java:3789)
at java.util.regex.Pattern$Curly.match0(Pattern.java:4264)
at java.util.regex.Pattern$Curly.match(Pattern.java:4248)
at java.util.regex.Pattern$Slice.match(Pattern.java:3986)
at java.util.regex.Pattern$Begin.match(Pattern.java:3539)
at java.util.regex.Matcher.match(Matcher.java:1270)
at java.util.regex.Matcher.matches(Matcher.java:604)
at org.apache.dubbo.metadata.ServiceTestUtil.isMap(ServiceTestUtil.java:97)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:151)
at org.apache.dubbo.metadata.ServiceTestUtil.generateEnclosedType(ServiceTestUtil.java:200)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:82)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:89)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:158)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:145)
at org.apache.dubbo.metadata.ServiceTestUtil.generateCollectionType(ServiceTestUtil.java:188)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:156)
at org.apache.dubbo.metadata.ServiceTestUtil.generateEnclosedType(ServiceTestUtil.java:200)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:82)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:89)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:158)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:145)
at org.apache.dubbo.metadata.ServiceTestUtil.generateCollectionType(ServiceTestUtil.java:188)
at org.apache.dubbo.metadata.ServiceTestUtil.generateType(ServiceTestUtil.java:156)
at org.apache.dubbo.metadata.ServiceTestUtil.generateEnclosedType(ServiceTestUtil.java:200)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:82)
at org.apache.dubbo.metadata.ServiceTestUtil.generateComplexType(ServiceTestUtil.java:89)