[MariaDB Announce] Critical bug in MariaDB 5.5.43 and 10.0.18

MariaDB Announce List announce at mariadb.org
Fri May 15 00:21:49 EEST 2015

This is a warning about a critical bug in MariaDB 5.5.43 and 10.0.18
that may affect some users during a major version upgrade.

Shortly after the releases of both MariaDB 5.5.43 and 10.0.18, a
significant problem was discovered.

The problem occurs when upgrading between major versions, such as from
MariaDB 5.5 to MariaDB 10.0, or when migrating from another product,
such as from MySQL 5.6 to MariaDB 10.0. When mysql_upgrade is executed
as part of such a migration/upgrade it invokes the REPAIR VIEW
statement, which can cause the server to crash.

The issue is triggered by view definitions that cause an on-disk
(instead of in-memory) temporary table to be used. This occurs most
commonly when a view selects from an underlying table with one or more

The error was introduced as part of the fix for MDEV-6916 and the fix
is tracked in MDEV-8115.

 - https://mariadb.atlassian.net/browse/MDEV-6916

 - https://mariadb.atlassian.net/browse/MDEV-8115

Because of this issue, you should *NOT* perform a major version
upgrade, or migration from another product, to MariaDB 5.5.43 or
MariaDB 10.0.18 but instead wait for MariaDB 5.5.44 and 10.0.19 (now

Minor upgrades, such as from MariaDB 5.5.42 to MariaDB 5.5.43, are not
affected by this issue.

It is also worth mentioning that if you are a MariaDB Enterprise
subscriber you can safely ignore this message. Thanks to the
additional testing and certification processes for MariaDB Enterprise,
and its delayed release schedule which allows for additional community
testing, MariaDB Enterprise releases are not affected by this bug.

Thank you and sorry for the inconvenience,
The MariaDB team

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