stulzq opened a new issue, #3641:
URL: https://github.com/apache/incubator-shenyu/issues/3641
### Is there an existing issue for this?
- [X] I have searched the existing issues
### Current Behavior
````
2022-07-01 13:21:10 [main] ERROR
org.apache.shenyu.admin.service.manager.impl.DocManagerImpl - getDocInfo
error={}
java.lang.NullPointerException: null
at
org.apache.shenyu.admin.service.manager.impl.DocManagerImpl.getDocInfo(DocManagerImpl.java:98)
at
org.apache.shenyu.admin.service.manager.impl.DocManagerImpl.addDocInfo(DocManagerImpl.java:81)
at
org.apache.shenyu.admin.service.manager.impl.ServiceDocManagerImpl.pullApiDocument(ServiceDocManagerImpl.java:72)
at
org.apache.shenyu.admin.service.manager.impl.ServiceDocManagerImpl.lambda$pullApiDocument$0(ServiceDocManagerImpl.java:53)
at java.lang.Iterable.forEach(Iterable.java:75)
at
org.apache.shenyu.admin.service.manager.impl.ServiceDocManagerImpl.pullApiDocument(ServiceDocManagerImpl.java:52)
at
org.apache.shenyu.admin.service.manager.impl.LoadServiceDocEntryImpl.loadApiDocument(LoadServiceDocEntryImpl.java:69)
at
org.apache.shenyu.admin.listener.ApplicationStartListener.onApplicationEvent(ApplicationStartListener.java:49)
at
org.apache.shenyu.admin.listener.ApplicationStartListener.onApplicationEvent(ApplicationStartListener.java:33)
at
org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at
org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at
org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421)
at
org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378)
at
org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:46)
at
org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
at
org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
at
org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
at java.lang.Iterable.forEach(Iterable.java:75)
at
org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
at
org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
at
org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586)
at
org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
at
org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745)
at
org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:420)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1317)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1306)
at
org.apache.shenyu.admin.ShenyuAdminBootstrap.main(ShenyuAdminBootstrap.java:36)
````

### Expected Behavior
No exeption
### Steps To Reproduce
1.Run dotnet client AspNetCore example register by http
2.Restart Admin will get this exception
### Environment
```markdown
ShenYu version(s): 2.4.3
```
### Debug logs
_No response_
### Anything else?
I can fix it.
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