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This file should contain all know fatal bugs in the Maria storage
engine for the last source or binary release. Minor bugs, extensions
and feature request and bugs found since this release can be find in the
MySQL bugs databases at: http://bugs.mysql.com/ (category "Maria
storage engine").
There shouldn't normally be any bugs that affects normal operations in
any Maria release. Still, there are always exceptions and edge cases
and that's what this file is for.
For the first few Alpha releases of Maria there may be some edge cases
that crashes during recovery; We don't like that but we think it's
better to get the Maria alpha out early to get things tested and get
more developers on the code early than wait until these are fixed. We
do however think that the bugs are not seriously enough to stop anyone
from starting to test and even use Maria for real (as long as they are
prepared to upgrade to next MySQL-Maria release ASAP).
If you have found a bug that is not listed here, please add it to
http://bugs.mysql.com/ so that we can either fix it for next release
or in the worst case add it here for others to know!
IMPORTANT:
If you have been using a MySQL-5.1-Maria-alpha build and upgrading to
MySQL-5.1-Maria-beta you MUST run maria_chk --recover on all your
Maria tables. This is because we made an incompatible change of how
transaction id is stored and old transaction id's must be reset!
cd mysql-data-directory
maria_chk --recover */*.MAI
As the Maria-1.5 engine is now in beta we will do our best to not
introduce any incompatible changes in the data format for the Maria
tables; If this would be ever be needed, we will, if possible, support
both the old and the new version to make upgrades as easy as possible.
Known bugs that we are working on and will be fixed shortly
===========================================================
- We have some time ago some instabilities in log writing that is was
under investigation but we haven't been able to repeat in a while.
This causes mainly assert to triggers in the code and sometimes
the log handler doesn't start up after restart.
Most of this should now be fixed.
- INSERT on a duplicate key against a key inserted by another connection
that has not yet ended will give a duplicate key error instead of
waiting for the other statement to end.
Known bugs that are planned to be fixed before Gamma/RC
=======================================================
- If we get a write failure on disk (disk full or disk error) for the
log, we should stop all usage of transactional tables and mark all
transactional tables that are changed as crashed.
For the moment, if this happens, you have to take down mysqld,
remove all logs, restart mysqld and repair your tables.
If you get the related error:
"Disk is full writing '/usr/local/mysql/var/maria_log.????????' (Errcode: 28)
Waiting for someone to free space..."
you should either free disk space, in which Maria will continue as before
or kill mysqld, remove logs and repair tables.
Known bugs that are planned to be fixed later
=============================================
LOCK TABLES .. WRITE CONCURRENT is mainly done for testing MVCC. Don't
use this in production.
Missing features that is planned to fix before Beta
===================================================
None
Features planned for future releases
====================================
Most notable is full transaction support and multiple reader/writers
in Maria 2.0
http://forge.mysql.com/worklog/
(you can enter "maria" in the "quick search" field there).
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