HBase Error : zookeeper.znode.parent mismatch

Question

i am trying to learn Hadoop and i'v reached HBase section in Hadoop Definitive Guide. i tried to start HBase and got error. Could someone give me step-by-step guide?

opel@ubuntu:~$ zkServer.sh start
JMX enabled by default
Using config: /home/opel/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
opel@ubuntu:~$ start-hbase.sh 
starting master, logging to /home/opel/hbase-0.94.20/logs/hbase-opel-master-ubuntu.out
opel@ubuntu:~$ hbase shell
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 0.94.20, r09c60d770f2869ca315910ba0f9a5ee9797b1edc, Fri May 23 22:00:41 PDT 2014

hbase(main):001:0> status
14/06/02 22:40:44 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:45 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:47 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:49 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:51 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:55 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:59 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.

ERROR: org.apache.hadoop.hbase.MasterNotRunningException: Retried 7 times

Here is some help for this command:
Show cluster status. Can be 'summary', 'simple', or 'detailed'. The
default is 'summary'. Examples:

  hbase> status
  hbase> status 'simple'
  hbase> status 'summary'
  hbase> status 'detailed'

is there anything wrong?

Answer 1

I had the same problem. For me the solution was to add the following property to the hbase-site.xml (for me it can be found under /usr/lib/hbase/conf directory):

<configuration>
        <property>
                <name>zookeeper.znode.parent</name>
                <value>/hbase-unsecure</value>
        </property>
</configuration>

But this is only for the standalone mode. I still have no idea how to solve this problem when using external ZooKeeper.

Answer 2

When I had this problem I could able to fix this by not using zookeeper. If you're running HBase in standalone mode then you don't need zookeeper. I could able to skip the zookeeper part my making the hbase.cluster.distributed property false.

<property>     <name>hbase.cluster.distributed</name>     <value>false</value>   </property>

Now, I could able to play with hbase without zookeeper.

Answer 3

In cloudera management page, Goto services -> hbase1 and start the sevice problem will be resolved. No need to make the hbase unsecure property.

Answer 4

there wont be any problem with the configurations if you are using the Cloudera Manager VM.

The problem is HMaster is not up. To resolve it, go to Cloudera Manager and restart the HBase services. it will resolve the issue.