Public bug reported: How to reproduce:
Given: * A cluster of 5 Galera nodes (percona packages) * running in the multi-master writes/reads layout, * auto-recovery decisions made my the custom Pacemaker OCF RA, it can only monitor/stop/start the mysqld_safe, no more interference, it removes nothing in the data path. With that, do multiple runs of custom jepsen tests with Nemesis in the random network-split partitions mode (all links and details about test cases I described here https://goo.gl/VHyIIE , although that's tl;dr). Results: Expected: nodes will always recover after partitions with a merged state, isolated nodes can't make write progress w/o quorum. Actual: a node (the n5 here) have done write progress, diverged, and refuses to start with the errors like: [ERROR] WSREP: Local state seqno (189675) is greater than group seq no (188050): states diverged. Logs, package versions, configs and wsrep status/vars are attached. ** Affects: codership-mysql Importance: Undecided Status: New ** Affects: percona-xtradb-cluster Importance: Undecided Status: New ** Affects: percona-xtradb-cluster-5.6 (Ubuntu) Importance: Undecided Status: New ** Attachment added: "mysql_logs.tgz" https://bugs.launchpad.net/bugs/1583521/+attachment/4666139/+files/mysql_logs.tgz ** Also affects: percona-xtradb-cluster Importance: Undecided Status: New ** Also affects: percona-xtradb-cluster-5.6 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1583521 Title: After a network split, a node can make a write progress and end-up with a diverged local seqno To manage notifications about this bug go to: https://bugs.launchpad.net/codership-mysql/+bug/1583521/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
