Jiangjie Qin created KAFKA-5075:
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Summary: The position in the consumers may be advanced incorrectly
when some exception is thrown from consumer.poll()
Key: KAFKA-5075
URL: https://issues.apache.org/jira/browse/KAFKA-5075
Project: Kafka
Issue Type: Bug
Reporter: Jiangjie Qin
In Fetcher.fetchRecords() we iterate over the partition data to collect the
ConsumerRecords, after we collect some consumer records from a partition, we
advance the position of that partition then move on to the next partition. If
the next partition throws exceptions (e.g. OffsetOutOfRangeException), the
messages that have already been read out of the buffer will not be delivered to
the users. Since the positions of the previous partitions have been be updated,
those messages will not be consumed again either.
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