org.apache.kafka.clients.consumer.CommitFailedException: Commit cannot be completed since the group has already rebalanced and assigned the partitions to another member. This means that the time between subsequent calls to poll() was longer than the configured max.poll.interval.ms, which typically implies that the poll loop is spending too much time message processing. You can address this either by increasing max.poll.interval.ms or by reducing the maximum size of batches returned in poll() with max.poll.records.
异常解决
a)调大max.poll.interval,ms，默认300000ms（300s）
b)调小max.poll.records，默认500
c)另起线程
参考文章：https://www.jianshu.com/p/1120e26244c2
https://blog.csdn.net/shibuwodai_/article/details/80678717