HBase not connecting to ZooKeeper

I am not able to connect to HBase shell on my local Ubuntu machine. Tried to look all across internet. Not getting what’s wrong. In the logs I keep getting this error –
zookeeper.RecoverableZooKeeper: Unable to create ZooKeeper Connection
Please help.

hbase-site.xml
<configuration>
<property>
<name>hbase.rootdir</name>
<value>hdfs://localhost:54310/hbase</value>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/hduser/zookeeper</value>
</property>

<property>
<name>hbase.zookeeper.property.clientPort</name>
<value>2222</value>
<description>Property from ZooKeeper’s config zoo.cfg.
The port at which the clients will connect.
</description>
</property>

<property>
<name>hbase.zookeeper.quorum</name>
<value>localhost</value>
<description>Comma separated list of servers in the ZooKeeper Quorum.
</description>
</property>

</configuration>

core-site.xml
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/app/hadoop/tmp</value>
<description>A base for other temporary directories.</description>
</property>

<property>
<name>fs.default.name</name>
<value>hdfs://localhost:54310</value>
<description>The name of the default file system.</description>
</property>

</configuration>