It looks like inconsistent nodes tried to leave gracefully, but due to unfortunate timing the remaining node failed to maintain PC. As a workaround set wsrep_provider_options='pc.bootstrap=1' to restore PC.
It looks like inconsistent nodes tried to leave gracefully, but due to unfortunate timing the remaining node failed to maintain PC. As a workaround set wsrep_provider_ options= 'pc.bootstrap= 1' to restore PC.