Fixed Bugs
Fixed DONOR node getting stuck in Joined state after successful SST. Bugs fixed #1608680 and #1611728.
Removed protection against repeated calls of wsrep->pause() on the same node to allow parallel RSU operation.
Fixed error when running SHOW STATUS during group state update.
Setting the wsrep_auto_increment_control to OFF didn’t restore the original user set value.
Corrected the return code of sst_flush_tables() function to return a non-negative error code and thus pass assertion.
Using Percona XtraBackup as the SST method now requires Percona XtraBackup 2.3.5 or later.
Fixed memory leak and stale pointer due to stats not freeing when toggling the wsrep_provider variable.
Fixed failure of ROLLBACK to register wsrep_handler.
Improved rollback process to ensure that when a transaction is rolled back, any statements open by the transaction are also rolled back.
Fixed failure of symmetric encryption during SST.
Performing an SST would display the encryption key in the logs. It’s recommended to use use encrypt-key-file instead of encrypt-key option.
Node transitioning to non-primary state with active ALTER TABLE could result in a crash.
Fixed setting of seqno in grastate.dat to -1 on clean shutdown.
Fixed failure of asynchronous TOI actions (like DROP) for non-primary nodes.
Removed the unused sst_special_dirs variable.
Added support of defaults-group-suffix for SST scripts.
Other low-level fixes and improvements for better stability.
