Connecting to Zookeeper in a Apache Kafka Multi Node cluster
<p>I followed the following instructions to set up a multi node kafka cluster.
Now, how to connect to the zookeeper ? Is it okay to connect to just one zookeeper from the Producer/consumer side in JAVA or is there a way to connect all the zookeeper nodes ? </p>

<p>Setting a multi node Apache ZooKeeper cluster</p>

<p>On every node of the cluster add the following lines to the file kafka/config/zookeeper.properties</p>

<pre><code>    server.1=zNode01:2888:3888
    server.2=zNode02:2888:3888
    server.3=zNode03:2888:3888
    #add here more servers if you want
    initLimit=5
    syncLimit=2
</code></pre>

<p>On every node of the cluster create a file called myid in the folder represented by the dataDir property (by default the folder is /tmp/zookeeper ). The myid file should only contains the id of the znode (‘1’ for zNode01, ‘2’ for ZNode02, etc… )</p>

<p>Setting  a multi broker Apache Kafka cluster</p>

<p>On every node of the cluster modify modify the property zookeeper.connect from the file  kafka/config/server.properties:</p>

<pre><code>    zookeeper.connect=zNode01:2181,zNode02:2181,zNode03:2181
</code></pre>

<p>On every node of the cluster modify the property host.name from the file kafka/config/server.properties:
        host.name=zNode0x</p>

<p>On every node of the cluster modify the property broker.id from the file kafka/config/server.properties (every broker in the cluster should have a unique id)</p>