hbase(main):004:0> scan ‘test‘ ,{LIMIT=>10}
ROW COLUMN+CELL
ERROR: org.apache.hadoop.hbase.NotServingRegionException: Region test,,1479311170393.0d8c4702c0de52f88306d92871584a23. is not online on master,16201,1480507150043
at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionByEncodedName(HRegionServer.java:2910)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.getRegion(RSRpcServices.java:1057)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:2388)
at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:33648)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2178)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:112)
at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)
at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)
at java.lang.Thread.run(Thread.java:745)
Hbase 执行 disable 后，没成功然后强制停止后，在启动后可能会出现上面的错误。停止hbase,zookeeper ，将zookeeper下的数据删除 在启动他们就好了
可能是执行disable时，修改了zookeeper结构,有强制停止了程序，导致数据损坏，hbase找不到region的文件
Hbase 错误 is not online on master
原文：http://www.cnblogs.com/billSoft/p/6117074.html