This is a bugfix release, fixing recently discovered bugs in the previous MySQL Cluster NDB 6.3 release.
This release incorporates all bugfixes and changes made in previous MySQL Cluster releases, as well as all bugfixes and feature changes which were added in mainline MySQL 5.1 through MySQL 5.1.41 (see Changes in MySQL 5.1.41 (2009-11-05)).
Please refer to our bug database at http://bugs.mysql.com/ for more details about the individual bugs fixed in this version.
A new configuration parameter
HeartbeatThreadPriority makes it possible to
select between a first-in, first-out or round-round scheduling
policy for management node and API node heartbeat threads, as
well as to set the priority of these threads. See
Defining a MySQL Cluster Management Server, or
Defining SQL and Other API Nodes in a MySQL Cluster, for more
The ndb_desc utility can now show the extent
space and free extent space for subordinate
TEXT columns (stored in hidden
BLOB tables by NDB). A
--blob-info option has been
added for this program that causes ndb_desc
to generate a report for each subordinate
BLOB table. For more information, see
ndb_desc — Describe NDB Tables.
When one or more data nodes read their LCPs and applied undo logs significantly faster than others, this could lead to a race condition causing system restarts of data nodes to hang. This could most often occur when using both ndbd and ndbmtd processes for the data nodes. (Bug #51644)
When deciding how to divide the REDO log, the
DBDIH kernel block saved more than was needed
to restore the previous local checkpoint, which could cause REDO
log space to be exhausted prematurely (
DML operations can fail with
NDB error 1220
(REDO log files overloaded...) if the
opening and closing of REDO log files takes too much time. If
this occurred as a GCI marker was being written in the REDO log
while REDO log file 0 was being opened or closed, the error
could persist until a GCP stop was encountered. This issue could
be triggered when there was insufficient REDO log space (for
example, with configuration parameter settings
NoOfFragmentLogFiles = 6 and
FragmentLogFileSize = 6M) with a load
including a very high number of updates.
References: See also Bug #20904.
During an online upgrade from MySQL Cluster NDB 6.2 to MySQL
Cluster NDB 6.3, a sufficiently large amount of traffic with
more than 1 DML operation per transaction could lead.an NDB 6.3
data node to crash an NDB 6.2 data node with an internal error
DBLOQH kernel block.
A side effect of the ndb_restore
--rebuild-indexes options is
to change the schema versions of indexes. When a
mysqld later tried to drop a table that had
been restored from backup using one or both of these options,
the server failed to detect these changed indexes. This caused
the table to be dropped, but the indexes to be left behind,
leading to problems with subsequent backup and restore
ndb_restore crashed while trying to restore a corrupted backup, due to missing error handling. (Bug #51223)
The ndb_restore message
created index `PRIMARY`... was directed to
stderr instead of
equal to 1 or 2, if data nodes from one node group were
restarted 256 times and applications were running traffic such
that it would encounter
1204 (Temporary failure, distribution
changed), the live node in the node group would
crash, causing the cluster to crash as well. The crash occurred
only when the error was encountered on the 256th restart; having
the error on any previous or subsequent restart did not cause
For a Disk Data tablespace whose extent size was not equal to a
whole multiple of 32K, the value of the
FREE_EXTENTS column in the
INFORMATION_SCHEMA.FILES table was
smaller than the value of
As part of this fix, the implicit rounding of
UNDO_BUFFER_SIZE performed by
CREATE TABLESPACE Syntax) is now done explicitly, and
the rounded values are used for calculating
values and other purposes.
References: See also Bug #31712.
Once all data files associated with a given tablespace had been
dropped, there was no way for MySQL client applications
(including the mysql client) to tell that the
tablespace still existed. To remedy this problem,
INFORMATION_SCHEMA.FILES now holds
an additional row for each tablespace. (Previously, only the
data files in each tablespace were shown.) This row shows
TABLESPACE in the
FILE_TYPE column, and
It was possible to issue a
TABLESPACE statement in which
INITIAL_SIZE was less than
EXTENT_SIZE. (In such cases,
erroneously reported the value of the
FREE_EXTENTS column as
and that of the
TOTAL_EXTENTS column as
0.) Now when either of these statements is
issued such that
INITIAL_SIZE is less than
EXTENT_SIZE, the statement fails with an
appropriate error message.
References: See also Bug #49709.
Cluster API: An issue internal to ndb_mgm could cause problems when trying to start a large number of data nodes at the same time. (Bug #51273)
References: See also Bug #51310.