connection node_2; connection node_1; SELECT COUNT(*) = 3 FROM mysql.wsrep_allowlist; COUNT(*) = 3 1 connection node_2; SELECT COUNT(*) = 3 FROM mysql.wsrep_allowlist; COUNT(*) = 3 1 connection node_1; connection node_2; connection node_3; connection node_3; SET @@global.wsrep_desync = 1; SET SESSION wsrep_sync_wait = 0; SET GLOBAL wsrep_provider_options = 'gmcast.isolate=1'; connection node_1; DELETE FROM mysql.wsrep_allowlist WHERE ip LIKE '127.0.0.3'; SELECT COUNT(*) = 2 FROM mysql.wsrep_allowlist; COUNT(*) = 2 1 connection node_2; SELECT COUNT(*) = 2 FROM mysql.wsrep_allowlist; COUNT(*) = 2 1 connection node_3; SET GLOBAL wsrep_provider_options = 'gmcast.isolate=0'; SET @@global.wsrep_desync = 0; connection node_1; INSERT INTO mysql.wsrep_allowlist(ip) VALUES ('127.0.0.3'); connection node_3; # restart connection node_1; CALL mtr.add_suppression('WSREP: Connection not allowed'); connection node_2; CALL mtr.add_suppression('WSREP: Connection not allowed'); connection node_3; CALL mtr.add_suppression('WSREP: Ignoring lack of quorum');