报错信息：
ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Received CLOSE for a region which is not online, and we're not opening.
2016-12-07 16:00:42,558 INFO org.apache.hadoop.hbase.regionserver.RSRpcServices: Close dc4a28b161ff37666cc738aa5c9921bb, moving to null
2016-12-07 16:00:42,558 INFO org.apache.hadoop.hbase.regionserver.RSRpcServices: Close 3560cfc81c22c8026ada507bac72d001, moving to null
2016-12-07 16:00:42,558 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Received CLOSE for a region which is not online, and we're not opening.
原因：
当Hbase运行时候，region达到了设置的文件大小后，就要开始分裂了。分裂的过程是：
1）老region开始下线 ，这里就对应了报错日志中的is not online
2）老region分裂
3）老region关闭，这里就对应了报错日志中的 is closing
解决办法：关闭自动分裂，人为的进行分裂。
或者将单个region文件值设置大写