We've observed reports of MariaDB-Galera hangups (within individual nodes, causing the node to need to be taken offline) with version 5.5.40. The hangups appear due to an issue identified in MariaDB itself and is introduced in MariaDB 5.5.40; the developers have posted a fix and targeted it for MariaDB 5.5.41. Issue in MariaDB: https://mariadb.atlassian.net/browse/MDEV-7026 Detailed developer analysis: https://lists.launchpad.net/maria-developers/msg07860.html Report of the issue specific to Galera: https://groups.google.com/forum/#!topic/codership-team/jB4aV0COkxI Users of MariaDB 5.5.40 with or without Galera may observe sporadic, random lockups of the database server over the course of days.
Hi Michael How can we reproduce it ? can't find any info in attached links Ofer
hi Ofer - it's an extremely rare race condition, I'm not aware of reproduction steps besides the very low-level ones stated in the upstream report in https://mariadb.atlassian.net/browse/MDEV-7026
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-0825.html