无法将映射数组写入jmeter中的kafka

import org.apache.kafka.clients.producer.ProducerRecord

// 创建Kafka生产者
def kafkaProducer = new org.apache.kafka.clients.producer.KafkaProducer<String, String>(props)

// 定义映射数组
def mapArray = [
    [key1: 'value1', key2: 'value2'],
    [key1: 'value3', key2: 'value4']
]

// 遍历映射数组并发送消息到Kafka
mapArray.each { map ->
    def record = new ProducerRecord<String, String>('topicName', map.toString())
    kafkaProducer.send(record)
}

// 关闭Kafka生产者
kafkaProducer.close()