title: Why is the kafka consumer consuming the same message hundreds of times?
body: <p>I see from the logs that exact same message is consumed by the 665 times. Why does this happen?</p>
  
  <p>I also see this in the logs</p>
  
  <pre><code>Commit cannot be completed since the group has already rebalanced and assigned the partitions to another member. 
  This means that the time between subsequent calls to poll() was longer than the configured session.timeout.ms, which typically implies 
  that the poll loop is spending too much time message processing. You can address this either by increasing the session 
  timeout or by reducing the maximum size of batches returned in poll() with max.poll.records.
  </code></pre>
  
  <p>Consumer properties</p>
  
  <pre><code>group.id=someGroupId
  bootstrap.servers=kafka:9092
  enable.auto.commit=false
  key.deserializer=org.apache.kafka.common.serialization.StringDeserializer
  value.deserializer=org.apache.kafka.common.serialization.StringDeserializer
  session.timeout.ms=30000
  max.poll.records=20
  </code></pre>
  
  <p>PS: Is it possible to consume only a specific number of messages like 10 or 50 or 100 messages from the 1000 that are in the queue?
  I was looking at 'fetch.max.bytes' config, but it seems like it is for a message size rather than number of messages.</p>
  
  <p>Thanks</p>