Hi, Is the IP address valid that you're trying to bind the server? Please tell me some info about your environment: cloud? docker? kubernetes? ZooKeeper config files would also be beneficial to take a look. Regards, Andor On Mon, Jul 23, 2018 at 5:02 PM, harish lohar wrote: > Hi , > > I am seeing bind failure for zookeeper ports, these are random and not > easily reproducible. > There was no one else listening on these ports. > > We have recently upgraded to 3.5.4-beta , earlier i never saw this issue > > 2018-07-22 00:08:59,409 [myid:] - WARN [main:QuorumPeerConfig@644] - > Non-optimial configuration, consider an odd number of servers. > 2018-07-22 00:08:59,707 [myid:181] - ERROR > [/xx.xx.xxx.xxx:3888:QuorumCnxManager$Listener@878] - Exception while > listening > java.net.BindException: Cannot assign requested address (Bind failed) > at java.net.PlainSocketImpl.socketBind(Native Method) > at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387) > at java.net.ServerSocket.bind(ServerSocket.java:375) > at java.net.ServerSocket.bind(ServerSocket.java:329) > at > org.apache.zookeeper.server.quorum.QuorumCnxManager$ > Listener.run(QuorumCnxManager.java:856) > ket.bind(ServerSocket.java:329) >