Comment 8 for bug 1890470

It seems to be a lack of robustness in percona itself:

https://dba.stackexchange.com/questions/42681/percona-node-fails-to-join-operation-not-permitted#42689
https://stackoverflow.com/questions/18375856/mariadb-replication-does-not-work
https://dba.stackexchange.com/questions/54392/node-unable-to-join-a-galera-cluster-it-fails-during-state-transfer

So I'd say this is not caused by a change in the charm and I'd remove cdo-release-blocker? Thanks!