出现错误：SpringBoot启动出现 Kafka的错误：Couldn't resolve server de-kafka.pp.dktapp.cloud:9092 from bootstrap.servers as DNS resolution failed for de-kafka.pp.dktapp.cloud - org.apache.kafka.clients.ClientUtils - ClientUtils.java:75

发表于 | 分类于 |

1）、报错信息

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- org.apache.kafka.clients.producer.ProducerConfig - AbstractConfig.java:347
2020-08-10 17:11:12.909 WARN  [main                           ] [ClientUtils       ] Couldn't resolve server de-kafka.pp.dktapp.cloud:9092 from bootstrap.servers as DNS resolution failed for de-kafka.pp.dktapp.cloud  - org.apache.kafka.clients.ClientUtils - ClientUtils.java:75
2020-08-10 17:11:12.909 INFO  [main                           ] [KafkaProducer       ] [Producer clientId=bff-test-server-bff-test-server-logback] Closing the Kafka producer with timeoutMillis = 0 ms.  - org.apache.kafka.clients.producer.KafkaProducer - KafkaProducer.java:1182
2020-08-10 17:11:12.910 INFO  [main                           ] [ProducerConfig       ] ProducerConfig values:

2）、错误的原因
》》》是因为logback-spring.xmlSpring 日志文件中的配置问题，dev环境中的 kafkaAppender 中配置了 <producerConfig>bootstrap.servers=de-kafka.pp.dktapp.cloud:9092</producerConfig>，但是服务器是不能访问de-kafka.pp.dktapp.cloud:9092这个地址的，所以就会报错，连接不了。

3）、解决办法，注释掉就行了，或换一个可以连通的地址。

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<springProfile name="dev">
  <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
      <level>INFO</level>
    </filter>
    <layout class="ch.qos.logback.classic.PatternLayout">
      <pattern>
        %d{yyyy-MM-dd HH:mm:ss.SSS} %-5p [%-31t] [%-54logger{0}] %marker%m%ex{full} %X{correlationId} - %logger - %F:%L%n
      </pattern>
    </layout>
  </appender>

  <!--<appender name="kafkaAppender" class="com.github.danielwegener.logback.kafka.KafkaAppender">-->
  <!--  <encoder class="net.logstash.logback.encoder.LoggingEventCompositeJsonEncoder">-->
  <!--    <providers>-->
  <!--      <timestamp>-->
  <!--        <timeZone>GMT+8</timeZone>-->
  <!--      </timestamp>-->
  <!--      <pattern>-->
  <!--        <pattern>-->
  <!--          {-->
  <!--          "logger_name": "%logger{40}",-->
  <!--          "thread_name": "%thread",-->
  <!--          "level": "%level",-->
  <!--          "instance_id": "%contextName",-->
  <!--          "module_name": "${appName}",-->
  <!--          "message": "%marker%m%ex{full} - %logger - %F:%L%n",-->
  <!--          "sfc.correlation_id": "%X{correlationId}"-->
  <!--          }-->
  <!--        </pattern>-->
  <!--      </pattern>-->
  <!--    </providers>-->
  <!--  </encoder>-->

  <!--  <topic>sfc_order_log</topic>-->
  <!--  <keyingStrategy class="com.github.danielwegener.logback.kafka.keying.HostNameKeyingStrategy" />-->
  <!--  <deliveryStrategy class="com.github.danielwegener.logback.kafka.delivery.AsynchronousDeliveryStrategy" />-->
  <!--  <producerConfig>bootstrap.servers=de-kafka.pp.dktapp.cloud:9092</producerConfig>-->
  <!--  <producerConfig>acks=0</producerConfig>-->
  <!--  <producerConfig>linger.ms=1000</producerConfig>-->
  <!--  <producerConfig>max.block.ms=0</producerConfig>-->
  <!--  <producerConfig>client.id=${HOSTNAME}-${CONTEXT_NAME}-logback</producerConfig>-->
  <!--</appender>-->

  <root level="DEBUG">
    <appender-ref ref="consoleAppender" />
    <!--<appender-ref ref="kafkaAppender"/>-->
  </root>
</springProfile>