while consuming messages from kafka in batches of 1000 messages, using springboot application, sometimes the following error(exception) is occuring, Please help me find reason for this error and how to solve it .
ERROR(Exception): "level":"ERROR","thread":"org.springframework.kafka.KafkaListenerEndpointContainer#0-0-C-1","logger":"com.exception.KafkaCommonErrorHandler","message":"'handleBatch' is not implemented by this handler","exception":"org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method 'public void com.service.ConsumerService.processMessage(java.util.List<org.apache.kafka.clients.consumer.ConsumerRecord<java.lang.String, com.model.DTO>>,org.springframework.kafka.support.Acknowledgment)' threw exception; nested exception is java.lang.NullPointerException; nested exception is java.lang.NullPointerException\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.decorateException(KafkaMessageListenerContainer.java:2638)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeBatchOnMessage(KafkaMessageListenerContainer.java:2267)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeBatchOnMessageWithRecordsOrList(KafkaMessageListenerContainer.java:2237)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeBatchOnMessage(KafkaMessageListenerContainer.java:2183)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeBatchListener(KafkaMessageListenerContainer.java:2093)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeBatchListener(KafkaMessageListenerContainer.java:1976)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:1955)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeIfHaveRecords(KafkaMessageListenerContainer.java:1353)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1344)\n\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:1236)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\n\tSuppressed: org.springframework.kafka.listener.ListenerExecutionFailedException: Restored Stack Trace\n\t\tat org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:363)\n\t\tat org.springframework.kafka.listener.adapter.BatchMessagingMessageListenerAdapter.invoke(BatchMessagingMessageListenerAdapter.java:180)\n\t\tat org.springframework.kafka.listener.adapter.BatchMessagingMessageListenerAdapter.onMessage(BatchMessagingMessageListenerAdapter.java:172)\n\t\tat org.springframework.kafka.listener.adapter.BatchMessagingMessageListenerAdapter.onMessage(BatchMessagingMessageListenerAdapter.java:61)\n\t\tat org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeBatchOnMessage(KafkaMessageListenerContainer.java:2247)\nCaused by: java.lang.NullPointerException: null\n"
