Hi, More update on this : We upgraded our Cloudera Manager & CDH Version to 6.2 after following all the required steps. Now, we can see that Master is active and Backup Master is also running and identified and assumed responsibility. Problem : When we go to hbase shell & run 'list' command we see all the tables that should be there. When we run 'count' or 'scan' command we get below error in hbase shell : "ERROR: No server address listed in hbase:meta for region volume,,1547112088868.09539931eb256ed2dfb5a43c116e0112. containing row" Below is the error on HBase Master Log : ABORTING master HOST,16000,1558270209713: Unhandled exception. Starting shutdown. ***** java.lang.IllegalStateException: Expected the service ClusterSchemaServiceImpl [FAILED] to be RUNNING, but the service has FAILED at org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService.checkCurrentState(AbstractService.java:345) at org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService.awaitRunning(AbstractService.java:291) at org.apache.hadoop.hbase.master.HMaster.initClusterSchemaService(HMaster.java:1260) at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:1038) at org.apache.hadoop.hbase.master.HMaster.startActiveMasterManager(HMaster.java:2271) at org.apache.hadoop.hbase.master.HMaster.lambda$run$0(HMaster.java:581) at java.lang.Thread.run(Thread.java:748) Caused by: java.io.IOException: Timedout 300000ms waiting for namespace table to be assigned and enabled: tableName=hbase:namespace, state=ENABLED at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:108) at org.apache.hadoop.hbase.master.ClusterSchemaServiceImpl.doStart(ClusterSchemaServiceImpl.java:63) at org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService.startAsync(AbstractService.java:226) at org.apache.hadoop.hbase.master.HMaster.initClusterSchemaService(HMaster.java:1258) ... 4 more
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