Percona XtraDB Cluster 5.7.21-29.26 Is Now Available

Fixed Bugs

• PXC-2039: Node consistency was compromised for INSERT INTO ... ON DUPLICATE KEY UPDATE workload because the regression introduced in Percona XtraDB Cluster 5.7.17-29.20made it possible to abort local transactions without further re-evaluation in case of a lock conflict.
• PXC-2054 Redo optimized DDL operations (like sorted index build) were not blocked in case of a running backup process, leading to SST failure. To fix this, --lock-ddl option blocks now all DDL during the xtrabackup backup stage.
• General code improvement was made in the GTID event handling, when events are captured as a part of the slave replication and appended to the Galera replicated write-set. This fixed PXC-2041 (starting async slave on a single node Percona XtraDB Cluster led to a crash) and PXC-2058 (binlog-based master-slave replication broke the cluster) caused by the incorrect handling in the GTID append logic.
• An issue caused by non-coincidence between the order of recovered transaction and the global seqno assigned to the transaction was fixed ensuring that the updated recovery wsrep coordinates are persisted.
• PXC-904: Replication filters were not working with account management statements like CREATE USER in case of Galera replication; as a result, such commands were blocked by the replication filters on async slave nodes but not on Galera ones.
• PXC-2043: SST script was trying to use pv (the pipe viewer) for progress and rlimit options even on nodes with no pv installed, resulting in SST fail instead of just ignoring these options for inappropriate nodes.
• PXC-911: When node’s own IP address was defined in the wsrep_cluster_address variable, the node was receiving “no messages seen in” warnings from its own IP address in the info log.

This release also contains fixes for the following CVE issues: CVE-2018-2565, CVE-2018-2573, CVE-2018-2576, CVE-2018-2583, CVE-2018-2586, CVE-2018-2590, CVE-2018-2612, CVE-2018-2600, CVE-2018-2622, CVE-2018-2640, CVE-2018-2645, CVE-2018-2646, CVE-2018-2647, CVE-2018-2665, CVE-2018-2667, CVE-2018-2668, CVE-2018-2696, CVE-2018-2703, CVE-2017-3737.