title: How to use spring cloud sleuth traceId in kafka consumers
body: <p>I am using springboot 2.3.4, corresponding spring-kafka 2.5.6.RELEASE, springcloud sleuth 2.2.5,
  I use @KafkaListener to listen for Kafka messages, but during the test I found that the producer has a traceId, and I need the consumer to generate a new traceId, but unfortunately there is no traceId in the log print. I am a novice, which makes me very confused. Do I need to enable certain configurations, or I need to implement trace by myself?
  thanks!!</p>
  <pre><code> @KafkaListener( topics = {&quot;#{'${kafka.topics}'}&quot;}, containerFactory = &quot;batchMessageFactory&quot;)
      public void onMessage(List&lt;ConsumerRecord&lt;String, String&gt;&gt; records) {
          if(!CollectionUtils.isEmpty(records)) {
           
              records.stream().forEach(record -&gt; {
                  String message = record.value();
                  log.info(&quot;messge:{}&quot;,message)
              }
              });
          }
  
  </code></pre>