Mariadb nodes freeze occasionally with the following error in the logs, any clues? (drupal app, db freezes on clearing application cache) [Warning] WSREP: Failed to apply app buffer: seqno: 903792, status: 1 Nov 23 21:42:55 websrv4 mysqld[1725]: #011 at galera/src/trx_handle.cpp:apply():351 Nov 23 21:42:55 websrv4 mysqld[1725]: Retrying 2th time Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55Read more