@Override
    public void handleRequest(BizContext bizCtx, AsyncContext asyncCtx, T request) {
        throw new UnsupportedOperationException(
            "ASYNC handle request is unsupported in SyncUserProcessor!");
    }
unsupported here!

@see com.alipay.remoting.rpc.protocol.UserProcessor#handleRequest(com.alipay.remoting.BizContext, com.alipay.remoting.AsyncContext, java.lang.Object)
src/main/java/com/alipay/remoting/rpc/protocol/SyncUserProcessor.java