HBase長時間無法關閉［Waiting on regionserver(s) to go down］

為了釋放已經刪除的region，重啟hbase，執行./bin/stop-hbase.sh。

等了很久還未關閉，檢視master日誌，顯示一直在等待regionserver

2015-07-08 09:11:25,800 INFO org.apache.hadoop.hbase.master.ServerManager: Waiting on regionserver(s) to go down Colander-hb01,60020,1435801056660

再去檢視此regionserver情況，日誌顯示Region is not online

2015-07-08 09:17:34,419 DEBUG org.apache.hadoop.hbase.regionserver.HRegionServer: NotServingRegionException; Region is not online: COLANDER_DownloadedURL,com.soku.www:http/t/nisearch/Camino+sangriento+6/_cid_15_time_100_sort_score_display_album_high_24?sfilter=1,1417099858158.e9e95f20d0f45860aa0778a5b6e97dbc.

陷入了死迴圈的情況，永遠也無法完成關閉。

嘗試手動強制關閉regionserver，成功了

./bin/hbase-daemons.sh stop regionserver

隨即，hbase成功關閉。