Are you using fastjson as the default serialization protocol there? Say by using ‘dubbo-serialization-fastjson’?
I think the the exception happened on the provider side when trying to deserialize raw json data to java bean. Would you please set a breakpoint at the following place to try to debug and see the exact type of the second argument ’type’? FastjsonObjectInput#readObject(Class<T> cls, Type type) I guess it’s because the autoType feature has been disabled in the latest several fastjson releases for security reasons. Jun > On Apr 8, 2022, at 11:20 PM, Daniel SAWAN <danielsa...@gmail.com> wrote: > > client side error : > Caused by: org.apache.dubbo.remoting.RemotingException: > com.alibaba.fastjson.JSONException: autoType is not support. > java.lang.ClassCastException > > Seems like instead of sending a List<User> dubbo client is sending a > List<JSONObject> to Dubbo server.