注: 转自 HBase region is not online 问题修复
一年多没有搞HBase了，回想前年和营神一起战斗的日子，～～～。今天线上遇到下面一个问题：
hbase(main):002:0> get 'mynamespace:user_basic_info','BAC3510A922CF026500874EA3975E123' COLUMN CELL ERROR: org.apache.hadoop.hbase.NotServingRegionException: Region mynamespace:user_basic_info,BA5968E36ADB91CE1EA37D44267F5865,1489326561674.0250284baa6119d676821e86cfaa29f4. is not online on ＊＊＊＊＊＊＊,60020,1491385979553 at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionByEncodedName(HRegionServer.java:2922) at org.apache.hadoop.hbase.regionserver.RSRpcServices.getRegion(RSRpcServices.java:1053) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2006) at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:33644) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2170) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:109) 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)其他region 都是正常的，重启regionserver 后依然报同样的错误。
首先检查这张表是否存储一致性问题
hbase hbck -details table 发现的确出现了2个不一致的地方2 inconsistencies detected.
既然不一致，咱就尝试修复一下：
hbase hbck -repair table这个功能要管理权限，使用慎重！修复完了以后结果如下
Summary: Table hbase:meta is okay. Number of regions: 1 Deployed on: ctum2f0602005.idc.wanda-group.net,60020,1482504754412 Table idctag:user_basic_info is okay. Number of regions: 124 0 inconsistencies detected. Status: OK