Percona XtraDB Cluster 5.5.39-25.11¶
Based on Percona Server 5.5.39-36.0 including all the bug fixes in it, Galera Replicator 2.11 and on wsrep API 25.11), Percona XtraDB Cluster 5.5.39-25.11 is now the current stable release. All of Percona‘s software is open-source and free.
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.
Percona XtraDB Cluster has implemented threadpool scheduling fixes. Bug fixed #1333348.
gmcast.listen_addrwas configured to a certain address, local connection point for outgoing connections was not bound to listen address. This would happen if OS has multiple interfaces with IP addresses in the same subnet, it may happen that OS would pick wrong IP for local connection point and other nodes would see connections originating from IP address which was not listened to. Bug fixed #1240964.
Client connections were closed unconditionally before generating SST request. Fixed by avoiding closing connections when wsrep is initialized before storage engines. Bug fixed #1258658.
Node consistency issues with foreign keys have been fixed. This fix introduces two new variables:
wsrep_slave_UK_checks. These variables are set to
FALSErespectively by default. They control whether Foreign Key and Unique Key checking is done for applier threads. (#1260713).
FLUSH TABLES WITH READ LOCKwas used on a node with
1while there was a
DMLon other nodes then, subsequent SELECTs/SHOW STATUS didn’t hang earlier providing non-causal output, that has been fixed here. Bug fixed #1271177.
Updating a unique key value could cause server hang if slave node has enabled parallel slaves. Bug fixed #1280896.
Fixed the events replication inconsistencies. Bug fixed #1312618.
Truncating the sorted version of multi-byte character conversion could lead to wsrep certification failures. Bug fixed #1314854.
garbcouldn’t be started with
initscript on RHEL 6.5. Bug fixed #1323652.
GTID of TOI operations is now also synced to InnoDB tablespace in order to get consistent backups. Bug fixed #1329055.
UNIV_DEBUG) is now distributed with binary
tar.gzalong with RPM and DEB packages. Bug fixed #1332073.
Startup failure with
Undetected state gaphas been fixed. Bug fixed #1334606.
The restart sequence in
scripts/mysql.serverwould fail to capture and return if the start call failed to start the server, so a restart could occur that failed upon start-up, and the script would still return
0as if it worked without any issues. Bug fixed #1339894.
wsrep consistency check is now enabled for
REPLACE ... SELECTas well. This was implemented because
REPLACE .. SELECTduring checksumming. Bug fixed #1343209.
A memory leak in
wsrep_mysql_parsefunction has been fixed. Bug fixed #1345023.
SHOW STATUSwas generating debug output in the error log. Bug fixed #1347818.
The netcat in garbd init script has been replaced with nmap for compatibility in CentOS 7. Bug fixed #1349384.
netcatin SST script for CentOS 7
nmap-ncat. Bug fixed #1359767.
Percona XtraDB Cluster Errata can be found in our documentation.