title: Error handler threw an exception: Kafka consumer CommitFailedException
body: <p>Offset commit cannot be completed since the consumer is not part of an active group for auto partition assignment; it is likely that the consumer was kicked out of the group.</p>
  <p>Kafka is working if and it is consuming message and the consumed message will send to a service via restTemplate but somehow restTemplate is failed due to connection but I'm getting below error for Kafka.
  What is the problem for Kafka to consume when restTemplate is failed?</p>
  <p>[org.springframework.kafka.KafkaListenerEndpointContainer#3-0-C-1] ERROR o.s.k.l.KafkaMessageListenerContainer$ListenerConsumer - Error handler threw an exception
  org.apache.kafka.clients.consumer.CommitFailedException: Offset commit cannot be completed since the consumer is not part of an active group for auto partition assignment; it is likely that the consumer was kicked out of the group.
  at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.sendOffsetCommitRequest(ConsumerCoordinator.java:1116)
  at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.commitOffsetsSync(ConsumerCoordinator.java:983)
  at org.apache.kafka.clients.consumer.KafkaConsumer.commitSync(KafkaConsumer.java:1510)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doCommitSync(KafkaMessageListenerContainer.java:2209)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.commitSync(KafkaMessageListenerContainer.java:2204)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.commitIfNecessary(KafkaMessageListenerContainer.java:2190)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.processCommits(KafkaMessageListenerContainer.java:2004)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeErrorHandler(KafkaMessageListenerContainer.java:1906)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1812)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:1739)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:1636)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:1366)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1082)
  at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:990)
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
  at java.util.concurrent.FutureTask.run(FutureTask.java:266)</p>