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MySQL NDB Cluster 6.1 - 7.1 Release Notes  /  Changes in MySQL Cluster NDB 6.2  /  Changes in MySQL Cluster NDB 6.2.7 (5.1.22-ndb-6.2.7) (2007-10-10)

Changes in MySQL Cluster NDB 6.2.7 (5.1.22-ndb-6.2.7) (2007-10-10)

This is a bugfix release, fixing recently discovered bugs in the previous MySQL Cluster NDB 6.2 release.

MySQL Cluster NDB 6.2 no longer in development.  MySQL Cluster NDB 6.2 is no longer being developed or maintained; if you are using a MySQL Cluster NDB 6.2 release, you should upgrade to the latest version of MySQL Cluster, which is available from .

Obtaining MySQL Cluster NDB 6.2.  You can download the latest MySQL Cluster NDB 6.2 source code and binaries for supported platforms from

This Beta 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 5.1.22 (see Changes in MySQL 5.1.22 (2007-09-24, Release Candidate)).


Please refer to our bug database at for more details about the individual bugs fixed in this version.

Functionality Added or Changed

  • Cluster Replication: A new configuration parameter TimeBetweenEpochsTimeout enables a timeout to be set for time between epochs. (Bug #31276)

  • Additional checks were implemented to catch unsupported online ALTER TABLE operations. Currently it is not possible to reorder columns or to change the storage engine used for a table using online ALTER TABLE.

    Some redundant checks made during online creation of indexes were removed.

Bugs Fixed

  • It was possible in some cases for a node group to be lost due to missed local checkpoints following a system restart. (Bug #31525)

  • NDB tables having names containing nonalphanumeric characters (such as $) were not discovered correctly. (Bug #31470)

  • A node failure during a local checkpoint could lead to a subsequent failure of the cluster during a system restart. (Bug #31257)

  • A cluster restart could sometimes fail due to an issue with table IDs. (Bug #30975)

  • Transaction timeouts were not handled well in some circumstances, leading to excessive number of transactions being aborted unnecessarily. (Bug #30379)

  • In some cases, the cluster managment server logged entries multiple times following a restart of ndb_mgmd. (Bug #29565)

  • ndb_mgm --help did not display any information about the -a option. (Bug #29509)

  • The cluster log was formatted inconsistently and contained extraneous newline characters. (Bug #25064)

  • Online ALTER operations involving a column whose data type has an implicit default value left behind temporary .frm files, causing subsequent DROP DATABASE statements to fail. (Bug #31097)

  • Transactions were committed prematurely when LOCK TABLE and SET autocommit = 0 were used together. (Bug #30996)

  • The mysqld_safe script contained a syntax error. (Bug #30624)