Cannot construct instance of `org.springframework.security.core.authority.SimpleGrantedAuthority`
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参考技术A 错误描述com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of org.springframework.security.core.GrantedAuthority (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
然后在redis的反序列化使用Jackson2JsonRedisSerializer反序列化，在里面配置ObjectMapper
配置中加上
最后说下jackson+redis序列化会根据get方法自动序列没有此字段的序列化字段出来，SimpleGrantedAuthority中只有role字段 ，没有authority字段，有getAuthority方法赋值role值。
其实就是在spring security 权限集合反序列化失败
这时候我们就需要自定义一个反序列化的类
同时加上一个注解 自定义解析即可生效
@JsonDeserialize(using = CustomAuthorityDeserializer.class)
RuntimeError: Cannot run in multiple processes: IOLoop instance has already been initialized. You ca
解决方法：
settings中的debug改为false，或者注释掉
参照：
https://stackoverflow.com/questions/32521122/cannot-run-in-multiple-processes-ioloop-instance-has-already-been-initialized
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