在druid集群环境中 broker节点的作用是查询.它知道metadata 通过zookeeper发送到了集群中的哪个节点,从而能够准确的查询到.broker也把各个节点的结果汇聚到一个节点中.On start up, Realtime nodes announce themselves and the segments they are serving in Zookeeper. 启动类 io.druid.cli.Main server broke 查询转发 大多数durid查询中包含一个时
kafka_2.8.0-0.8.1 一 现象 生产环境一组kafka集群经常发生问题,现象是kafka在zookeeper上的broker节点消失,此时kafka进程和端口都在,然后每个broker都在报错,主要是 1) [2017-01-09 12:40:53,832] INFO Partition [topic1,3] on broker 1361: Shrinking ISR for partition [topic1,3] from 1351,1361,1341 to 1361 (kaf
Description During the programming classes Vasya was assigned a difficult problem. However, he doesn't know how to code and was unable to find the solution in the Internet, so he asks you to help. You are given a sequence a, consisting of ndistinct i