Percona XtraDB Cluster 5.6.15-25.2¶
Based on Percona Server 5.6.15-63.0 including all the bug fixes in it, Galera Replicator 3.2 and on Codership wsrep API 5.6.15-25.2 is now the first RELEASE CANDIDATE release. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.6.15-25.2 milestone at Launchpad.
This release contains all of the features and bug fixes in Percona XtraDB Cluster 5.5.34-25.9, plus the following:
Percona XtraDB Cluster now supports stream compression/decompression with new xtrabackup-sst
wsrep_reject_querieshas been implemented that can be used to reject queries for that node. This can be useful if someone wants to manually run maintenance on the node like
mysqldumpwithout need to change the settings on the load balancer.
XtraBackup SST now supports
innodb_log_group_home_dirin the configuration file with
wsrep_local_cached_downtostatus variable has been introduced. This variable shows the lowest sequence number in
gcache. This information can be helpful with determining IST and/or SST.
Garbdinit script and configuration files have been packaged for CentOS and Debian, in addition, in Debian garbd is packaged separately in
grastate.datfile was not getting zeroed appropriately it would lead to RBR error during the IST. Bug fixed #1180791.
init stopscript on CentOS didn’t wait for the server to be fully stopped. This would cause unsuccessful server restart because the
startaction would fail because the daemon would still be running. Bug fixed #1254153.
DELETE FROMstatement (without
WHEREclause) would crash slaves if master did not have binlogging enabled. Bug fixed #1254179.
Missing protection for brute force threads against
innodb lock wait time outwould cause applier to fail with lock wait timeout exceeded on
rsyncSST donor. Bug fixed #1255501.
Recent optimizations in 3.x branch introduced a regression in base filename construction which could lead big transactions fail with:
WSREP: Failed to open file '...'. Bug fixed #1255964.
Joiner node would not initialize storage engines if
rsyncwas used for SST and the first view was non-primary. Bug fixed #1257341.
Table level lock conflict resolving was releasing the wrong lock. Bug fixed #1257678.
perldependencies needed for Percona XtraDB Cluster 5.6. Bug fixed #1258563.
Obsolete dependencies have been removed from Percona XtraDB Cluster. Bug fixed #1259256.
CREATE TABLE AS SELECTprocess would remain hanging in case it was run in parallel with the DDL statement on the selected table. Bug fixed #1164893.
Naming of the Galera packages have been fixed to avoid the confusion, ie.
Percona-XtraDB-Cluster-galera-3now. Bug fixed #1253923.
Fixed rsync SST for compatibility with
rsyncversion 3.1.0. Bug fixed #1261673.
On CentOS 5/6, those who may have installed
percona-xtrabackup-20 with Percona XtraDB Cluster 5.6 due to bug #1226185, the upgrade may fail, the dependency issue has been fixed since then, hence replace
percona-xtrabackup before upgrade.
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.