HBase architecture follows the traditional master slave model where you have a master which takes decisions and one or more slaves which does the real task. In HBase, the master is called HMaster and slaves are called HRegionServers (yes..servers).…
[From] https://mapr.com/blog/in-depth-look-hbase-architecture/ In this blog post, I’ll give you an in-depth look at the HBase architecture and its main benefits over NoSQL data store solutions. Be sure and read the first blog post in this series, tit…
最近生产环境hbase集群出现停掉集群之后hmaster无法启动现象,master日志报异常:Timedout 300000ms waiting for namespace table to be assigned,导致整个集群起不来. 2016-12-12 18:04:12,243 FATAL [adfnn2:16020.activeMasterManager] master.HMaster: Failed to become active master java.io.IOException…
查看hbase服务状态报错: hbase(main)::> status ERROR: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing at org.apache.hadoop.hbase.master.HMaster.checkInitialized(HMaster.java:2293) at org.apache.hadoop.hbase.master.MasterRp…