https://community.cloudera.com/t5/Support-Questions/ERROR-WHILE-STARTING-HBASE-MASTER-TableExistsSxception-and/m-p/161379#M123758 <P>@ Nitin</P><P>ROOT CAUSE:- There should be a table named by namespace for maintaining the info of tables, which is already exists on /hbase directory , While starting the process HMaster it will create the namespace directory under /hbase directory So it is showing the Table Exists Exception. SOLUTION:- We have to manually repair the /hbase metastore by using offline command as, $HBASE_HOME/bin/hbase org.apache.hadoop.hbase.util.hbck.OfflineMetaRepair Then start the process of HMASTER. IF this is not working Use the zookeeper client for removing it as, From the Hbase docker or any one of the docker. zookeeper-3.4.6/bin/zkCli.sh -server 192.168.1.90 ls / rmr /hbase ls / exit zookeeper-3.4.6/bin/zkCli.sh -server 192.168.1.91 ls / exit</P> Tue, 20 Sep 2016 18:03:05 GMT balay80 2016-09-20T18:03:05Z https://community.cloudera.com/t5/Support-Questions/ERROR-WHILE-STARTING-HBASE-MASTER-TableExistsSxception-and/m-p/161378#M123757 <P>I am getting an error in hbase while starting it in HDP. I am using HDP-2.3.2</P><P>2016-09-17 04:47:58,238 FATAL [master:hb-qa:60000] master.HMaster: Master server abort: loaded coprocessors are: [] 2016-09-17 04:47:58,239 FATAL [master:hb-qa:60000] master.HMaster: Unhandled exception. Starting shutdown. org.apache.hadoop.hbase.TableExistsException: hbase:namespace at org.apache.hadoop.hbase.master.handler.CreateTableHandler.prepare(CreateTableHandler.java:133) at org.apache.hadoop.hbase.master.TableNamespaceManager.createNamespaceTable(TableNamespaceManager.java:232) at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:86) at org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1046) at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:925) at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:605) at java.lang.Thread.run(Thread.java:745)</P><P>Can someone help me with this?</P> Tue, 20 Sep 2016 17:31:31 GMT https://community.cloudera.com/t5/Support-Questions/ERROR-WHILE-STARTING-HBASE-MASTER-TableExistsSxception-and/m-p/161378#M123757 nitinshk77 2016-09-20T17:31:31Z https://community.cloudera.com/t5/Support-Questions/ERROR-WHILE-STARTING-HBASE-MASTER-TableExistsSxception-and/m-p/161379#M123758 <P>@ Nitin</P><P>ROOT CAUSE:- There should be a table named by namespace for maintaining the info of tables, which is already exists on /hbase directory , While starting the process HMaster it will create the namespace directory under /hbase directory So it is showing the Table Exists Exception. SOLUTION:- We have to manually repair the /hbase metastore by using offline command as, $HBASE_HOME/bin/hbase org.apache.hadoop.hbase.util.hbck.OfflineMetaRepair Then start the process of HMASTER. IF this is not working Use the zookeeper client for removing it as, From the Hbase docker or any one of the docker. zookeeper-3.4.6/bin/zkCli.sh -server 192.168.1.90 ls / rmr /hbase ls / exit zookeeper-3.4.6/bin/zkCli.sh -server 192.168.1.91 ls / exit</P> Tue, 20 Sep 2016 18:03:05 GMT https://community.cloudera.com/t5/Support-Questions/ERROR-WHILE-STARTING-HBASE-MASTER-TableExistsSxception-and/m-p/161379#M123758 balay80 2016-09-20T18:03:05Z