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In KAFKA-4879, we first noticed that KafkaConsumer will hang forever when deleting a topic. However, after looking closer, we have found that in general the position(TopicPartition topicPartition) ,commitSync() , committed() , and poll() (since pollOnce() calls updateFetchPositions() which blocks through a series of callbacks) method will continue to block indefinitely unless the offsets are retrieved for the provided TopicPartition.  To avoid this scenario from occurring:

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