前言：之前博客裏面提到本公司爲物聯網項目。項目中使用mqtt+kafka進行與設備端的通訊，之前的協議格式爲json格式，現在改成字節數組byte[]格式進行通信。
- 報錯信息如下
Can't convert value of class [B to class org.apache.kafka.common.serialization.StringSerializer specified in value.serializer
Field kafkaTemplateByte in com.hiss.producer.KafkaNewProducer required a bean of type 'org.springframework.kafka.core.KafkaTemplate' that could not be found.
- Bean method 'kafkaTemplate' in 'KafkaAutoConfiguration' not loaded because @ConditionalOnMissingBean (types: org.springframework.kafka.core.KafkaTemplate; SearchStrategy: all) found bean 'kafkaTemplate'
Action:
Consider revisiting the conditions above or defining a bean of type 'org.springframework.kafka.core.KafkaTemplate' in your configuration.
-
分析原因
之前聲明KafkaTemplate時候value值爲String，後續改爲byte[]時候，未將KafkaTemplate的value類型改爲byte[]類型。 -
解決辦法
public KafkaTemplate<String, byte[]> kafkaTemplateByte() {
return new KafkaTemplate<String,byte[]>(producerFactoryByte());
}