1.自行修改server.properties中broker id后造成与meta.properties中数据不匹配
kafka.common.InconsistentBrokerIdException: Configured broker.id 2 doesn’t match stored broker.id 1 in meta.properties. If you moved your data, make sure your configured broker.id matches. If you intend to create a new broker, you should remove all data in your data directories (log.dirs).
2.__consumer_offsets这个topic是由kafka自动创建的，默认49个，这个topic是不能被删除的！
Error while executing topic command : Topic __consumer_offsets is a kafka internal topic and is not allowed to be marked for deletion.
为什么这里会是这样存储__consumer_offsets的呢：
1.将所有 N Broker 和待分配的 i 个 Partition 排序
2.将第 i 个 Partition 分配到第(i mod n)个 Broker 上
~持续更新！