MySQL NDB Cluster 7.3.20 is a new release of NDB Cluster, based on
MySQL Server 5.6 and including features from version 7.3 of the
NDB storage engine, as well as fixing
a number of recently discovered bugs in previous NDB Cluster
Obtaining MySQL NDB Cluster 7.3. MySQL NDB Cluster 7.3 source code and binaries can be obtained from https://dev.mysql.com/downloads/cluster/.
For an overview of changes made in MySQL NDB Cluster 7.3, see What is New in NDB Cluster 7.3.
This release also incorporates all bug fixes and changes made in previous NDB Cluster releases, as well as all bug fixes and feature changes which were added in mainline MySQL 5.6 through MySQL 5.6.39 (see Changes in MySQL 5.6.39 (2018-01-15, General Availability)).
NDB Replication: On an SQL node not being used for a replication channel with
sql_log_bin=0it was possible after creating and populating an NDB table for a table map event to be written to the binary log for the created table with no corresponding row events. This led to problems when this log was later used by a slave cluster replicating from the mysqld where this table was created.
Fixed this by adding support for maintaining a cumulative
any_valuebitmap for global checkpoint event operations that represents bits set consistently for all rows of a specific table in a given epoch, and by adding a check to determine whether all operations (rows) for a specific table are all marked as
NOLOGGING, to prevent the addition of this table to the
Table_mapheld by the binlog injector.
As part of this fix, the NDB API adds a new
getNextEventOpInEpoch3()method which provides information about any
AnyValuereceived by making it possible to retrieve the cumulative
any_valuebitmap. (Bug #26333981)
A query against the
INFORMATION_SCHEMA.FILEStable returned no results when it included an
ORDER BYclause. (Bug #26877788)
TRUNCATE TABLEon an
AUTO_INCREMENTID was not reset on an SQL node not performing binary logging. (Bug #14845851)
OM_SYNCflag is intended to make sure that all FSWRITEREQ signals used for a given file are synchronized, but was ignored by platforms that do not support
O_SYNC, meaning that this feature did not behave properly on those platforms. Now the synchronization flag is used on those platforms that do not support
O_SYNC. (Bug #76975, Bug #21049554)