BUG-5723: HBase RegionServers fails to shutdown.
Problem: RegionServers may fail to shutdown. The following error is reported in the RegionServer log file:
INFO org.apache.hadoop.hdfs.DFSClient: Could not complete /apps/hbase/data/test_hbase/3bce795c2ad0713505f20ad3841bc3a2/.tmp/27063b9e4ebc4644adb36571b5f76ed5 retrying...
and the following error is reported in the NameNode log file:
ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:hbase cause:org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot complete /apps/hbase/data/test_hbase/3bce795c2ad0713505f20ad3841bc3a2/.tmp/27063b9e4ebc4644adb36571b5f76ed5. Name node is in safe mode.
