Zookeeper error: Cannot open channel to X at election address

Question

I have installed zookeeper in 3 different aws servers. The following is the configuration in all the servers

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/         


        

Answer 1

We faced the same issue , for our case the root cause of the problem is too-many number of client connections . The default ulimit on aws ec2 instance is 1024 and this causes zookeeper nodes not able to communicate with each other .

The fix for this is change the ulimit to a higher number -> (> ulimit -n 20000 ) stop and start zookeeper.