Group replication ports issues What should be the ports for group replication if we are implementing group replication on three different MySQL servers? The my.cnf for the first server is 

port=3306
loose-group_replication_local_address= "x.x.x.x:3307"
loose-group_replication_group_seeds= "x.x.x.x:3307,x.x.x.x:3307,x.x.x.x:3307"


For the second server the settings are same and I have changed the IP's in loose-group_replication_local_address accordingly, but I am facing this error when running start GROUP_REPLICATION:


  [ERROR] Plugin group_replication reported: '[GCS] The member was unable to join the group. Local port: 3307'


Does any one know the solution?
In the manuel they advise to use port 33061. 
https://dev.mysql.com/doc/refman/5.7/en/group-replication-configuring-instances.html : 


  "The recommended port for group_replication_local_address is 33061"