cant start zookeeper from ambari cluster

[#1]

we have ambari cluster - 2.6

we restart the masters machine and start the services

when we start the zookeeper on master01 machine we get this from the log

2017-10-20 05:43:53,339 - INFO [main:NIOServerCnxnFactory@94] - binding to port 0.0.0.0/0.0.0.0:2181 2017-10-20 05:43:53,342 - ERROR [main:QuorumPeerMain@89] - Unexpected exception, exiting abnormally java.net.BindException: Address already in use at sun.nio.ch.Net.bind0(Native Method)

so zookeeper cant start on master01 and master02 machine

what chould be the problem here?

[#2 · Accepted solution]

@uri ben-ari

As we see that the error says:

 Unexpected exception, exiting abnormally java.net.BindException: Address already in use 

Means there is a Port conflict. So please first check if port 2181 is being used by any other process ? If yes then first kill the other process and then try starting the zookeeper.

Example:

Finding process that is using port 2181

# netstat -tnlpa | grep 2181

Once we know if other process is using that port then kill it:

# kill -9  $OtherProcess

Now try restarting the Zookeeper.

.

[#3]

thank you so much