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MySQL NDB Cluster 7.4 Release Notes  /  Changes in MySQL NDB Cluster 7.4.25 (5.6.45-ndb-7.4.25) (2019-07-23, General Availability)

Changes in MySQL NDB Cluster 7.4.25 (5.6.45-ndb-7.4.25) (2019-07-23, General Availability)

MySQL NDB Cluster 7.4.25 is a new release of MySQL NDB Cluster 7.4, based on MySQL Server 5.6 and including features in version 7.4 of the NDB storage engine, as well as fixing recently discovered bugs in previous NDB Cluster releases.

Obtaining MySQL NDB Cluster 7.4.  MySQL NDB Cluster 7.4 source code and binaries can be obtained from https://dev.mysql.com/downloads/cluster/.

For an overview of changes made in MySQL NDB Cluster 7.4, see What is New in NDB Cluster 7.4.

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 5.6.45 (see Changes in MySQL 5.6.45 (2019-07-22, General Availability)).

Bugs Fixed

  • The requestInfo fields for the long and short forms of the LQHKEYREQ signal had diffferent definitions; bits used for the key length in the short version were reused for flags in the long version, since the key length is implicit in the section length of the long version of the dignal but it was possible for long LQHKEYREQ signals to contain a keylength in these same bits, which could be misinterpreted by the receiving local query handler, potentially leading to errors. Checks have now been implemented to make sure that this no longer happens. (Bug #29820838)

  • When restoring TINYBLOB columns, ndb_restore now treats them as having the BINARY character set. (Bug #29486538)

  • Restoration of epochs by ndb_restore failed due to temporary redo errors. Now ndb_restore retries epoch updates when such errors occur. (Bug #29466089)

  • ndb_restore --restore-epoch incorrectly reported the stop GCP as 1 less than the actual position. (Bug #29343655)

  • Added support which was missing in ndb_restore for conversions between the following sets of types:

    • BLOB and BINARY or VARBINARY columns

    • TEXT and BLOB columns

    • BLOB columns with unequal lengths

    • BINARY and VARBINARY columns with unequal lengths

    (Bug #28074988)

  • Restore points in backups created with the SNAPSHOTSTART option (see Using The NDB Cluster Management Client to Create a Backup) were not always consistent with epoch boundaries. (Bug #27566346)

    References: See also: Bug #27497461.