常量字段值 (flink-connector-kafka-0.9 1.8.2 API)

org.apache.*

org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09<T>
限定符和类型	常量字段	值
`public static final long`	`DEFAULT_POLL_TIMEOUT`	`100L`
`public static final String`	`KEY_POLL_TIMEOUT`	`"flink.poll-timeout"`