Flink SQL xxx is not serializable. The object probably contains or references non serializable field

Flink 版本：1.10.3

在执行如下自定义 Socket Connector 示例：

// 创建 Socket Source 表
String sourceSql = "CREATE TABLE socket_source_table (n" +
        "  word STRING COMMENT '单词'n" +
        ") WITH (n" +
        "  'connector.type' = 'socket',n" +
        "  'host' = 'localhost',n" +