My workspace

Most modern distributed systems somewhere comes across the problem where only one instance of the process or job should runs and others instance of the same job or process should be standby. Apache zookeeper project provides this above functionality out of box. I am not going to describe all the usecases or solutions that could be solved by the Zookeeper. You can read the following great article for quick start. Let me describe our use case with more details, we have apache camel component which polling some resources and only one instance of the component should run in any time. It means there should be one leader and a few followers. When master or leader goes down, any follower should replace the master. You also can use doozerd instead of zookeeper for leader election, but for me zookeeper is easy to maintain. It's very easy to install a multi server zookeeper cluster. I have recommend you to follow the step from this blog to setup a cluster. Now when we have done our cl...