A ZooKeeper Quorum consisting of three ZooKeeper servers has been created.
The zoo.cfg
located on all three ZooKeeper servers looks as follows:
maxClientCnxns=50# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial# synchronization phase can takeinitLimit=10# The number of ticks that can pass between# sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.dataDir=/var/lib/zookeeper# the port at which the clients will connectclientPort=2181server.1=<ip-address-1>:2888:3888server.2=<ip-address-2>:2888:3888server.3=<ip-address-3>:2888:3888
Analysis
It is clear that one of the three ZooKeeper servers will become the Leader
and the others Followers
. If the Leader
ZooKeeper server has been shutdown, the Leader
election will start again. The aim is to check if another ZooKeeper server will become the Leader
if the Leader
server has been shut down.