本文介绍了如何从kafka(0.10.x)获取组提交偏移量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
该组的偏移量信息之前已存储在zookeeper中.现在，在Kafka群集(0.10.x)中，偏移量信息存储在名为 __ consumer_offsets 的主题中.
The offsets informations of the group were stored in zookeeper before. Now, in the Kafka Cluster (0.10.x), the offsets informations are stored in the topic which's name is __consumer_offsets.
但是如何获取指定的组的偏移量信息?
But how could I get the offsets information of the group which I specified？
推荐答案
对于活动组，调用以下命令以获取偏移量:
For active groups, invoke command below to retrieve the offsets:
bin/kafka-consumer-groups.sh --bootstrap-server broker1:9092 --describe --group test-consumer-group
对于非活动组，首先通过计算Math.abs(groupId.hashCode())％50获得目标偏移主题分区号，然后调用:
For inactive groups, first get the target offset topic partition number by calculating Math.abs(groupId.hashCode()) % 50, then invoke:
bin/kafka-simple-consumer-shell.sh --topic __consumer_offsets --partition <calculated number> --broker-list broker1:9092 --formatter "kafka.coordinator.GroupMetadataManager\$OffsetsMessageFormatter"
查找组的偏移量.
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