Dear brother, my project will appear this error from time to time, not request, his will, perhaps on-CodePudding

The 2020-11-01 12:56:27. 006 default [HTTP - nio - 8080 - exec - 1] ERROR O.A.C.C.C. [. [. [. [dispatcherServlet] - Servlet. Service () for the Servlet [dispatcherServlet] in the context with the path [] threw the exception [Request processing failed; nested exception is org. Springframework. HTTP. InvalidMediaTypeException: Invalid mime type "/" : does not contain subtype after '/'] with root cause
Org. Springframework. Util. InvalidMimeTypeException: Invalid mime type "/" : does not contain subtype after '/'
The at org. Springframework. Util. MimeTypeUtils. ParseMimeType (MimeTypeUtils. Java: 200)
The at org. Springframework. HTTP. MediaType. ParseMediaType (MediaType. Java: 531)
The at Java. The base/Java. Util. Stream. ReferencePipeline $3 to $1. Accept (ReferencePipeline. Java: 195)
The at Java. The base/Java. Util. ArrayList $ArrayListSpliterator. ForEachRemaining (ArrayList. Java: 1625)
The at Java. The base/Java. Util. Stream. AbstractPipeline. CopyInto (AbstractPipeline. Java: 484)
The at Java. The base/Java. Util. Stream. AbstractPipeline. WrapAndCopyInto (AbstractPipeline. Java: 474)
The at Java. The base/Java. Util. Stream. ReduceOps $ReduceOp. EvaluateSequential (ReduceOps. Java: 913)
The at Java. The base/Java. Util. Stream. AbstractPipeline. Evaluate (AbstractPipeline. Java: 234)
The at Java. The base/Java. Util. Stream. ReferencePipeline. Collect (ReferencePipeline. Java: 578)
The at org. Springframework. HTTP. MediaType. ParseMediaTypes (MediaType. Java: 556)
The at org. Springframework. Boot. Autoconfigure. Web. Servlet. WelcomePageHandlerMapping. GetAcceptedMediaTypes (WelcomePageHandlerMapping. Java: 88)
The at org. Springframework. Boot. Autoconfigure. Web. Servlet. WelcomePageHandlerMapping. GetHandlerInternal (WelcomePageHandlerMapping. Java: 77)
The at org. Springframework. Web. Servlet. Handler. AbstractHandlerMapping. GetHandler (AbstractHandlerMapping. Java: 401)
The at org. Springframework. Web. Servlet. DispatcherServlet. GetHandler (DispatcherServlet. Java: 1232)
The at org. Springframework. Web. Servlet. DispatcherServlet. DoDispatch (DispatcherServlet. Java: 1015)
The at org. Springframework. Web. Servlet. DispatcherServlet. DoService (DispatcherServlet. Java: 942)
The at org. Springframework. Web. Servlet. FrameworkServlet. The processRequest (FrameworkServlet. Java: 1005)
The at org. Springframework. Web. Servlet. FrameworkServlet. DoPost (FrameworkServlet. Java: 908)
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 660)
At org. Springframework. Web. Servlet. FrameworkServlet. Service (882) FrameworkServlet. Java:
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 741)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 231)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
At org, apache tomcat, websocket server WsFilter. DoFilter (53) WsFilter. Java:
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Springframework. Web. Filter. RequestContextFilter. DoFilterInternal (RequestContextFilter. Java: 99)
The at org. Springframework. Web. Filter. OncePerRequestFilter. DoFilter (OncePerRequestFilter. Java: 109)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Springframework. Web. Filter. FormContentFilter. DoFilterInternal (FormContentFilter. Java: 92)
The at org. Springframework. Web. Filter. OncePerRequestFilter. DoFilter (OncePerRequestFilter. Java: 109)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Springframework. Web. Filter. HiddenHttpMethodFilter. DoFilterInternal (HiddenHttpMethodFilter. Java: 93)
The at org. Springframework. Web. Filter. OncePerRequestFilter. DoFilter (OncePerRequestFilter. Java: 109)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Springframework. Web. Filter. CharacterEncodingFilter. DoFilterInternal (CharacterEncodingFilter. Java: 200)
The at org. Springframework. Web. Filter. OncePerRequestFilter. DoFilter (OncePerRequestFilter. Java: 109)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Apache. Catalina. Core. StandardWrapperValve. Invoke (StandardWrapperValve. Java: 202)
The at org. Apache. Catalina. Core. StandardContextValve. Invoke (StandardContextValve. Java: 96)
The at org. Apache. Catalina. The authenticator. AuthenticatorBase. Invoke (AuthenticatorBase. Java: 490)
The at org. Apache. Catalina. Core. StandardHostValve. Invoke (StandardHostValve. Java: 139)
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