In each node check the content of /var/lib/mysql/grastate.dat
version: 2.1
uuid: 9a50c4ec-4332-11e8-8b88-77564bb9f22a
seqno: 45
safe_to_bootstrap: 0
select the node with the highest value in seqno and edit the value of safe_to_bootstrap to 1
should be like these
version: 2.1
uuid: 9a50c4ec-4332-11e8-8b88-77564bb9f22a
seqno: 45
safe_to_bootstrap: 1
in these node run
systemctl start mysql@bootstrap.service
in the other nodes run
systemctl start mysqld
and finally in the bootstraped node run
systemctl stop mysql@bootstrap.service
systemctl start mysqld
