Hi All, I'm have installed Hbase Master service and region server on separate nodes and Hbase master started successfully but after within few minutes it goes down. Examined the log /var/log/hbase/hbase-hbase-master-chd104746.com.log and its showing the below errors. (Attached the part of error log file) 2017-08-09 17:27:18,533 INFO [chd104746.com,16000,1502279420790_ChoreService_1-EventThread] zookeeper.ClientCnxn: EventThread shut down 2017-08-09 17:27:18,544 ERROR [chd104746.com,16000,1502279420790_ChoreService_1] master.BackupLogCleaner: Failed to get hbase:backup table, therefore will keep all files org.apache.hadoop.hbase.TableNotFoundException: hbase:backup at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegionInMeta(ConnectionManager.java:1264) at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:1162) .... ..... 2017-08-09 17:28:18,374 FATAL [chd104746:16000.activeMasterManager] master.HMaster: Failed to become active master java.io.IOException: Timedout 300000ms waiting for namespace table to be assigned at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:104) at org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1061) at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:840) at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:213) ...... ...... .... 2017-08-09 17:28:18,401 FATAL [chd104746:16000.activeMasterManager] master.HMaster: Master server abort: loaded coprocessors are: [org.apache.hadoop.hbase.backup.master.BackupController] 2017-08-09 17:28:18,401 FATAL [chd104746:16000.activeMasterManager] master.HMaster: Unhandled exception. Starting shutdown. java.io.IOException: Timedout 300000ms waiting for namespace table to be assigned at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:104) at org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1061) at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:840) at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:213) at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1863) at java.lang.Thread.run(Thread.java:745) 2017-08-09 17:28:18,401 INFO [chd104746:16000.activeMasterManager] regionserver.HRegionServer: STOPPED: Unhandled exception. Starting shutdown. 2017-08-09 17:28:18,401 INFO [master/chd104746.com/10.100.204.22:16000] regionserver.HRegionServer: Stopping infoServer Could anyone please help on this ... Thanks, Vijay hbase-master-error.txt ... View more