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MySQL Cluster 6.1 - 7.1 Release Notes  /  Changes in MySQL Cluster NDB 7.0  /  Changes in MySQL Cluster NDB 7.0.11 (5.1.41-ndb-7.0.11) (2010-02-02)

Changes in MySQL Cluster NDB 7.0.11 (5.1.41-ndb-7.0.11) (2010-02-02)


MySQL Cluster NDB 7.0.11 was withdrawn shortly after release, due to Bug #51027. Users should upgrade to MySQL Cluster NDB 7.0.11a, which fixes this issue.

This release incorporates new features in the NDB storage engine and fixes recently discovered bugs in MySQL Cluster NDB 7.0.10.

This release also 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 5.1.39 (see Changes in MySQL 5.1.41 (2009-11-05)).


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

Functionality Added or Changed

  • Important Change: The maximum permitted value of the ndb_autoincrement_prefetch_sz system variable has been increased from 256 to 65536. (Bug #50621)

  • Added multi-threaded ordered index building capability during system restarts or node restarts, controlled by the BuildIndexThreads data node configuration parameter (also introduced in this release).

  • Cluster Replication: Due to the fact that no timestamp is available for delete operations, a delete using NDB$MAX() is actually processed as NDB$OLD. However, because this is not optimal for some use cases, NDB$MAX_DELETE_WIN() is added as a conflict resolution function; if the timestamp column value for a given row adding or updating an existing row coming from the master is higher than that on the slave, it is applied (as with NDB$MAX()); however, delete operations are treated as always having the higher value.

    See NDB$MAX_DELETE_WIN(column_name), for more information. (Bug #50650)

  • Cluster Replication: In circular replication, it was sometimes possible for an event to propagate such that it would be reapplied on all servers. This could occur when the originating server was removed from the replication circle and so could no longer act as the terminator of its own events, as normally happens in circular replication.

    To prevent this from occurring, a new IGNORE_SERVER_IDS option is introduced for the CHANGE MASTER TO statement. This option takes a list of replication server IDs; events having a server ID which appears in this list are ignored and not applied. For more information, see CHANGE MASTER TO Syntax.

    In conjunction with the introduction of IGNORE_SERVER_IDS, SHOW SLAVE STATUS has two new fields. Replicate_Ignore_Server_Ids displays information about ignored servers. Master_Server_Id displays the server_id value from the master. (Bug #47037)

    References: See also Bug #25998, Bug #27808.

Bugs Fixed

  • Initial start of partitioned nodes did not work correctly. This issue was observed in MySQL Cluster NDB 7.0 only. (Bug #50661)

  • The CREATE NODEGROUP client command in ndb_mgm could sometimes cause the forced shutdown of a data node. (Bug #50594)

  • Local query handler information was not reported or written to the cluster log correctly. This issue is thought to have been introduced in MySQL Cluster NDB 7.0.10. (Bug #50467)

  • Online upgrades from MySQL Cluster NDB 7.0.9b to MySQL Cluster NDB 7.0.10 did not work correctly. Current MySQL Cluster NDB 7.0 users should upgrade directly to MySQL Cluster NDB 7.0.11 or later.

    This issue is not known to have affected MySQL Cluster NDB 6.3, and it should be possible to upgrade from MySQL Cluster NDB 6.3 to MySQL Cluster NDB 7.0.10 without problems. See Upgrade and Downgrade Compatibility: MySQL Cluster NDB 6.x, for more information. (Bug #50433)

  • Dropping unique indexes in parallel while they were in use could cause node and cluster failures. (Bug #50118)

  • When attempting to join a running cluster whose management server had been started with the --nowait-nodes option and having SQL nodes with dynamically allocated node IDs, a second management server failed with spurious INTERNAL ERROR: Found dynamic ports with value in config... error messages. (Bug #49807)

  • When setting the LockPagesInMainMemory configuration parameter failed, only the error Failed to memlock pages... was returned. Now in such cases the operating system's error code is also returned. (Bug #49724)

  • If a query on an NDB table compared a constant string value to a column, and the length of the string was greater than that of the column, condition pushdown did not work correctly. (The string was truncated to fit the column length before being pushed down.) Now in such cases, the condition is no longer pushed down. (Bug #49459)

  • ndbmtd was not built on Windows (CMake did not provide a build target for it). (Bug #49325)

  • Performing intensive inserts and deletes in parallel with a high scan load could a data node crashes due to a failure in the DBACC kernel block. This was because checking for when to perform bucket splits or merges considered the first 4 scans only. (Bug #48700)

  • During Start Phases 1 and 2, the STATUS command sometimes (falsely) returned Not Connected for data nodes running ndbmtd. (Bug #47818)

  • When performing a DELETE that included a left join from an NDB table, only the first matching row was deleted. (Bug #47054)

  • Under some circumstances, the DBTC kernel block could send an excessive number of commit and completion messages which could lead to a the job buffer filling up and node failure. This was especially likely to occur when using ndbmtd with a single data node. (Bug #45989)

  • mysqld could sometimes crash during a commit while trying to handle NDB Error 4028 Node failure caused abort of transaction. (Bug #38577)

  • When setting LockPagesInMainMemory, the stated memory was not allocated when the node was started, but rather only when the memory was used by the data node process for other reasons. (Bug #37430)

  • Trying to insert more rows than would fit into an NDB table caused data nodes to crash. Now in such situations, the insert fails gracefully with error 633 Table fragment hash index has reached maximum possible size. (Bug #34348)

  • On Mac OS X or Windows, sending a SIGHUP signal to the server or an asynchronous flush (triggered by flush_time) caused the server to crash. (Bug #47525)

  • The ARCHIVE storage engine lost records during a bulk insert. (Bug #46961)

  • When using the ARCHIVE storage engine, SHOW TABLE STATUS displayed incorrect information for Max_data_length, Data_length and Avg_row_length. (Bug #29203)

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