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 :
<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>
<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>
<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>
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.