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Taken from the log: "[ERROR] WSREP: Address already in use"

You may need to kill all MySQL-wsrep related processes on Node 2 and restart again. Galera/Wsrep required following ports to be opened and available:

  • 3306 - mysql
  • 4567 - used by Galera for inter-node communication
  • 4444 - used for SST
  • 4568 - used for IST

Use netstat to check for PID of above said listening ports. Manually kill those PIDs and restart back mysqld with --wsrep-cluster-address option.