本篇内容介绍了“kafka怎么保存消费端的消费位置”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
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在kafka 中，提供了一个 ___consumer_ offsets_* 的一个内置topic
__consumer_offsets 默认分区50
创建consumer_offsets_group 消费组ID 稍后会用到
Math.abs("consumer_offsets_group".hashCode()) % 50
结果放在了11分区上
通过如下公式即可获取：
查看该消费群offsets：
bin/kafka-console-consumer.sh --topic __consumer_offsets --partition 11 --bootstrap-server localhost:9092 --formatter "kafka.coordinator.group.GroupMetadataManager\$OffsetsMessageFormatter" --consumer.config config/consumer.properties --from-beginning
结果：
[consumer_offsets_group/*消费组ID*/,consumer_offsets_test/*topic*/,1/*partition*/]::OffsetAndMetadata(offset=4/*提交的消费位移信息*/, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567461031, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,0]::OffsetAndMetadata(offset=3, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567461031, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,2]::OffsetAndMetadata(offset=4, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567461031, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,1]::OffsetAndMetadata(offset=4, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567466027, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,0]::OffsetAndMetadata(offset=3, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567466027, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,2]::OffsetAndMetadata(offset=4, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567466027, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,1]::OffsetAndMetadata(offset=4, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567468638, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,0]::OffsetAndMetadata(offset=3, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567468638, expireTimestamp=None)
[consumer_offsets_group,consumer_offsets_test,2]::OffsetAndMetadata(offset=4, leaderEpoch=Optional.empty, metadata=, commitTimestamp=1543567468638, expireTimestamp=None)
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