Tag: Zookeeper

  • This ZooKeeper instance is not currently serving requests

    When one of your zookeeper nodes is sending you this message, that means that your Zookeeper cluster hasn’t started in the right order.
     
    Solution: Restart your cluster (node per node), starting from node 1 (as stated in zoo.conf)
     
    This problem is easy to diagnose. When the order was wrong you will get this output:

    [myserver:myuser] ~: echo stat | nc localhost 2181
    This ZooKeeper instance is not currently serving requests

     
    After you’ve restarted all nodes (in the correct order), you will get this output:

    [myserver:myuser] ~: echo stat | nc localhost 2181 |grep Mode
    Mode: follower
    [myserver:myuser] ~: echo stat | nc localhost 2181 |grep Mode
    Mode: leader

     
     
    Hope this will help you out!