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Percona XtraDB Cluster Documentation

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Percona XtraDB Cluster 8.0.41-32 (2025-03-13)

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Percona XtraDB Cluster 8.0.41-32 includes all the features and bug fixes available in Percona Server for MySQL 8.0.41-32.

Release highlights

Percona XtraDB Cluster is based on Percona Server for MySQL. Find a complete list of improvements and bug fixes in the Percona Server for MySQL 8.0.41-32 (2025-02-26) release notes.

Percona XtraDB Cluster 8.0.41-32

Implements the Clone plugin for State Snapshot Transfer (SST) Method. The Clone SST is a modern and efficient method that leverages MySQL’s native cloning capabilities to transfer data from a donor node to a Joiner node. It is faster and more resource-efficient compared to traditional methods like xtrabackup or rsync.

Percona Server for MySQL 8.0.41-32

  • Extends the Encryption user-defined functions with the following:

    • Added support for pkcs1, oaep, or no padding for RSA encrypt and decrypt operations

    • Added support for pkcs1 or pkcs1_pss padding for RSA sign and verify operations

    • Added the encryption_udf.legacy_padding_scheme system variable to manage legacy padding schemes

    • Added the character set awareness

  • Improves the Data masking performance by introducing an internal term cache. The new cache speeds up lookups for gen_blocklist() and gen_dictionary() functions by storing dictionary data in memory.

    Find more detailed information in the Data masking overview and in the Data masking component functions.

MySQL 8.0.41

Improvements and bug fixes provided by Oracle for MySQL 8.0.41 and included in Percona Server for MySQL are the following:

  • Fixed an assertion in debug builds where certain IO buffer serializations caused system hangs. (Bug #37139618)

  • Resolved a failure when dropping the primary key and adding a new AUTO_INCREMENT column as the primary key in descending order using the INPLACE algorithm resulted in failure. (Bug #36658450)

  • Fixed incorrect results, including missing rows, in queries that used a descending primary key with the index_merge optimization. (Bug #106207, Bug #33767814)

  • Addressed a replication channel issue where MySQL failed to stop the channel properly when large transactions were being processed, and STOP REPLICA was requested. This issue also prevented graceful server shutdown, requiring process termination or system restart. (Bug #115966, Bug #37008345)

Find the complete list of bug fixes and changes in the MySQL 8.0.41 Release Notes.

Improvements

PXC-4469: Implements the Clone plugin for State Snapshot Transfer (SST) Method.

Bug fixes

  • PXC-4173: The Percona XtraDB Cluster node stalled when parallel replication workers executed DDLs through an asynchronous node.

  • PXC-4390: The wsrep_group_commit_queue option was removed because caused deadlock bugs.

  • PXC-4498: The Percona XtraDB Cluster node stalled and caused the cluster to stop responding.

  • PXC-4393: On the donor side, if the pipeline had more than two commands, only the last command’s failure was detected, but the error was shown for the second-to-last command.

  • PXC-4404: Setting the wsrep_preordered=ON option caused protocol violations.

  • PXC-4504: The DROP PROCEDURE/FUNCTION IF EXISTS option generated a local Global Transaction Identifier (GTID) event.

  • PXC-4506: The asynchronous replication threads on a Percona XtraDB Cluster node hung when resuming from an applier error after it was fixed.

  • PXC-4509: The asynchronous replication hung on the Percona XtraDB Cluster node if the replica received Global Transaction Identifier (GTID) from the source that had already been committed on it.

  • PXC-4515: Multi-source replication didn’t work on the Percona XtraDB Cluster node with the new asynchronous monitor logic.

  • PXC-4516: Global Transaction Identifier (GTID) auto-positioning replication didn’t work correctly on the Percona XtraDB Cluster node with the new async monitor logic.

  • PXC-4573: The mysql.pxc.sst.role lacked the INNODB_REDO_LOG_ARCHIVE privilege when the State Snapshot Transfer (SST) required InnoDB redo log archiving.

Additional resources

Download product binaries, packages, and tarballs at Percona Product Downloads

Install Percona XtraDB Cluster

The Percona XtraDB Cluster GitHub repository

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