title: org.apache.hadoop.hbase.NotServingRegionException: Region is not online: -ROOT-,,0 what is the reason behind for this error
body: <p>Thanks for taking interesting in my Question :) when ever i fire query like scan,put, create for any table in hbase shell  am getting  following error. and hbase shell  gives the result listing of tables and description of tables .... so would you please help me to clear out of this ? 
  And also can u please tell me the meaning of the structure <strong>-ROOT-,,0</strong> </p>
  
  <p>About versions am using </p>
  
  <p><strong>HBase 0.92.1-cdh4.1.2
  Hadoop 2.0.0-cdh4.1.2</strong></p>
  
  <p><em><strong>ERROR: org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: Region is not online: -ROOT-,,0</em></strong></p>