为什么没有任何输出呢，哪个大佬能指点一下小弟呢

MySqlSource source = MySqlSource.builder() .hostname("localhost") .port(3306) .databaseList("test") // .tableList("ota.*") .username("root") .password("root") .startupOptions(StartupOptions.initial()) .deserializer(new JsonDebeziumDeserializationSchema()) .build(); StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); env.enableCheckpointing(1000); // env.addSource(source).print(); env.fromSource(source, WatermarkStrategy.noWatermarks(), "mysql source").setParallelism(1).print().setParallelism(1); env.execute("Print MySQL Snapshot + Binlog");