get “ERROR: Can't get master address from ZooKeeper; znode data == null” when using Hbase shell

问题

I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :

$ ./bin/start-hbase.sh 

$ ./bin/hbase shell

2.0.0-p353 :001 > list

then I got this:

ERROR: Can't get master address from ZooKeeper; znode data == null

Why am I getting this error ? Another question: do I need to run ./sbin/start-dfs.sh and ./sbin/start-yarn.sh before I run base ?

Also, what are used ./sbin/start-dfs.sh and ./sbin/start-yarn.sh for ?

Here is some of my conf doc :

hbase-sites.xml

<configuration>
    <property>
        <name>hbase.rootdir</name>
        <value>hdfs://127.0.0.1:9000/hbase</value>
    </property>
    <property>
        <name>hbase.cluster.distributed</name>
        <value>true</value>
    </property>

    <property>
        <name>hbase.tmp.dir</name>
        <value>/Users/apple/Documents/tools/hbase-tmpdir/hbase-data</value>
    </property>
    <property>
        <name>hbase.zookeeper.quorum</name>
        <value>localhost</value>
    </property>
    <property>
        <name>hbase.zookeeper.property.dataDir</name>
        <value>/Users/apple/Documents/tools/hbase-zookeeper/zookeeper</value>
    </property>
</configuration>

core-sites.xml

<configuration>

  <property>
      <name>fs.defaultFS</name>
      <value>hdfs://localhost:9000</value>
      <description>The name of the default file system.</description>
  </property>

  <property>
      <name>hadoop.tmp.dir</name>
      <value>/Users/micmiu/tmp/hadoop</value>
      <description>A base for other temporary directories.</description>
  </property>

  <property>
      <name>io.native.lib.available</name>
      <value>false</value>
  </property>

</configuration>

yarn-sites.xml

<configuration>

    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>

    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
        <value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>

</configuration>

回答1:

If you just want to run HBase without going into Zookeeper management for standalone HBase, then remove all the property blocks from hbase-site.xml except the property block named hbase.rootdir.

Now run /bin/start-hbase.sh. HBase comes with its own Zookeeper, which gets started when you run /bin/start-hbase.sh, which will suffice if you are trying to get around things for the first time. Later you can put distributed mode configurations for Zookeeper.

You only need to run /sbin/start-dfs.sh for running HBase since the value of hbase.rootdir is set to hdfs://127.0.0.1:9000/hbase in your hbase-site.xml. If you change it to some location on local the filesystem using file:///some_location_on_local_filesystem, then you don't even need to run /sbin/start-dfs.sh.

hdfs://127.0.0.1:9000/hbase says it's a place on HDFS and /sbin/start-dfs.sh starts namenode and datanode which provides underlying API to access the HDFS file system. For knowing about Yarn, please look at http://hadoop.apache.org/docs/r2.3.0/hadoop-yarn/hadoop-yarn-site/YARN.html.

回答2:

This could also happen if the vm or the host machine is put to sleep ,Zookeeper will not stay live. Restarting the VM should solve the problem.

回答3:

You need to start zookeeper and then run Hbase-shell

{HBASE_HOME}/bin/hbase-daemons.sh {start,stop} zookeeper

and you may want to check this property in hbase-env.sh

# Tell HBase whether it should manage its own instance of Zookeeper or not.
export HBASE_MANAGES_ZK=false

Refer to Source - Zookeeper

回答4:

One quick solution could be to Restart hbase:

1) Stop-hbase.sh
2) Start-hbase.sh

回答5:

I had the exact same error. The Linux firewall was blocking connectivity. One can test ports via telnet. A quick fix is to turn off the firewall and see if it fixes it:

Completely disable the firewall on all of your nodes. Note: this command will not survive a reboot of your machines.

systemctl stop firewalld

Long term fix is that you must configure the firewall to allow the hbase ports.

Note, your version of hbase may use different ports: https://issues.apache.org/jira/browse/HBASE-10123

回答6:

The output from Hbase shell is quite high level that many misconfiguration would cause this message. To help yourself debug, it would be much better to look into the hbase log in

/var/log/hbase

to figure out the root cause of the issue.

I had the same problem too. For me, my root cause was due to hadoop-kms having a conflicting port number with my hbase-master. Both of them are using port 16000 so my HMaster didn't even get started when I invoke hbase shell. After I fixed that, my hbase worked.

Again, kms port conflict might not be your root-cause. Strongly suggest looking into /var/log/hbase to find the root cause.

回答7:

In my case with same error in running hbase - I did not include the zookeeper properties in the hbase-site.xml and still get the above error messages (as based in Apache hbase guide, only the two properites: rootdir, and distributed are essential).

I can also trace back my output of jps command that find out that indeed my Hregion server and Hmaster were not properly up and running.

After stop and start (like a reset), I did have these two up and running and can run hbase properly.

回答8:

if it's happening in VMWare or virtual box please restart Cloudera by command init1 please check you have root privilege and retry hope it will help :)

hbase shell

来源：https://stackoverflow.com/questions/22663484/get-error-cant-get-master-address-from-zookeeper-znode-data-null-when-us

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