@jspuri    I suggest making the following configuration changes:   1. The zoo.cfg files on both your ZK nodes should be the same tickTime=2000 initLimit=5 syncLimit=2 dataDir=/home/ec2-user/zookeeper clientPort=2181 server.1=ec2-server-1.compute-1.amazonaws.com:2888:3888 server.2=ec2-server-2.compute-1.amazonaws.com:2888:3888  Note: For proper Quorum zookeeper cluster should also have an odd number of servers (3 or 5)   2. In NiFi state-management.xml <property name="Connect String">ec2-server-1.compute-1.amazonaws.com:2888:3888,ec2-server-2.compute-1.amazonaws.com:2888:3888</property>   3. in nifi.properties file nifi.zookeeper.connect.string=ec2-server-1.compute-1.amazonaws.com:2888:3888,ec2-server-2.compute-1.amazonaws.com:2888:3888     Hope this helps, Matt ... View more