HBase Error : zookeeper.znode.parent mismatch - hadoop

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

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.

Answer 3

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 4

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

Answer 5

This problem tooks me a whole night, and this is how i resolved it:
After starting hadoop, go to : http://localhost:50070/dfshealth.html#tab-datanode
You will see a list of available datanode in a table, you just need to add it in your hbase-site.xml as follow for me:
<configuration>
<property>
<name>zookeeper.znode.parent</name>
<value>127.0.0.1:50010</value>
</property>
</configuration>

Answer 6

Best thing check your HBase logs. It will give you the clear idea about the error. In my case i was running Kafka + zookeeper and HBase on the same server. So, whenever i was trying to run hbase shell i was kept getting same error on the console. When I checked logs and found
port is already in use
so i just changed the value for
hbase.zookeeper.property.clientPort
in hbase-site.xml file and everything start running.

Answer 7

open zookeeper/bin and run the command - ./zkServer.sh start
After successful execution, execute command - /zkCli.sh
then execute command get /hbase-unsecure
if it returns as null then, create -s /testmaster "127.0.0.1:2222"
Also, edit hbase-site.xml by adding
<property>
<name>zookeeper.znode.parent</name>
<value>/testmaster</value>
</property>
PS - keep the value of hbase.cluster.distributed property as false.
Hope this solves your error.