请检查ServiceProperties中的sendRenew参数.

Please check the sendRenew parameter in your ServiceProperties.

https://docs.spring.io/spring-security/site/docs/current/reference/html/cas.html#cas-st

该服务必须等于一个网址，该网址将由CasAuthenticationFilter. sendRenew 默认为false，但应如果您的应用程序特别敏感，则将其设置为true.什么该参数的作用是告诉CAS登录服务单个符号登录时是不可接受的.相反，用户将需要重新输入他们的用户名和密码，以便获得对服务的访问权限.

The service must equal a URL that will be monitored by the CasAuthenticationFilter. The sendRenew defaults to false, but should be set to true if your application is particularly sensitive. What this parameter does is tell the CAS login service that a single sign on login is unacceptable. Instead, the user will need to re-enter their username and password in order to gain access to the service.