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This is an General Availability release. We did our best to eliminate bugs and problems during the testing release, but this is a software, so bugs are expected. If you encounter them, please report them to our bug tracking system.
In some cases when node is recovered variable threads_running would become huge. Bug fixed #1040108 (Teemu Ollakka).
Variable wsrep_defaults_file would be set up to the value in the last configuration file read. Bug fixed by keeping the value found in the top configuration file. Bug fixed #1079892 (Alex Yurchenko).
Running FLUSH TABLES WITH READ LOCK when slave applier needed to abort transaction that is on the way caused the deadlock situation. Resolved by grabbing Global Read Lock before pausing wsrep provider. Bug fixed #1083162 (Teemu Ollakka).
Percona XtraDB Cluster would crash when processing a delete for a table with foreign key constraint. Bug fixed #1078346 (Seppo Jaakola).
When variable innodb_support_xa was set to 0, wsrep position wasn’t stored into the InnoDB tablespace. Bug fixed #1084199 (Teemu Ollakka).
Using XtraBackup for State Snapshot Transfer would fail due to mktemp error. Bug fixed #1080829 (Alex Yurchenko).
XtraBackup donor would run XtraBackup indefinitely if the xtrabackup --tmpdir was on tmpfs. Bug fixed #1086978 (Alex Yurchenko).
In some cases non-uniform foreign key reference could cause a slave crash. Fixed by using primary key of the child table when appending exclusive key for cascading delete operation. Bug fixed #1089490 (Seppo Jaakola).
Percona XtraDB Cluster would crash when binlog_format was set to STATEMENT. This was fixed by introducing the warning message. Bug fixed #1088400 (Seppo Jaakola).
When installing from yum repository, Percona-XtraDB-Cluster-server and Percona-XtraDB-Cluster-client would conflict with mysql and mysql-server packages. Bug fixed #1087506 (Ignacio Nin).
Based on Percona Server 5.5.29-29.4 including all the bug fixes in it, Percona XtraDB Cluster 5.5.29-23.7.1 is now the current stable release. All of Percona‘s software is open-source and free.