6节点加莱拉集群冲突证书失效

我们有一个6节点加莱拉集群，如下表：6节点加莱拉集群冲突证书失效

mysql> show create table sessions; 
| Table | Create Table 
+----------+-------------- 
| sessions | CREATE TABLE `sessions` (
`id` int(11) NOT NULL AUTO_INCREMENT, 
`session_id` varchar(255) NOT NULL, 
`data` text, 
`created_at` datetime DEFAULT NULL, 
`updated_at` datetime DEFAULT NULL, 
PRIMARY KEY (`id`), 
KEY `index_sessions_on_session_id` (`session_id`), 
KEY `index_sessions_on_updated_at` (`updated_at`) 
) ENGINE=InnoDB AUTO_INCREMENT=260176483 DEFAULT CHARSET=utf8 | 


mysql> desc sessions; 
+------------+--------------+------+-----+---------+----------------+ 
| Field  | Type   | Null | Key | Default | Extra   | 
+------------+--------------+------+-----+---------+----------------+ 
| id   | int(11)  | NO | PRI | NULL | auto_increment | 
| session_id | varchar(255) | NO | MUL | NULL |    | 
| data  | text   | YES |  | NULL |    | 
| created_at | datetime  | YES |  | NULL |    | 
| updated_at | datetime  | YES | MUL | NULL |    | 
+------------+--------------+------+-----+---------+----------------+ 
5 rows in set (0.00 sec)

我们看到很多wsrep_local_cert_failures这样的节点上：

SHOW status like '%wsrep%'; 
| wsrep_local_cert_failures | 165419

加莱拉调试陈列着许多冲突：

THD: 251130, mode: local, state: executing, conflict: cert failure, seqno: 92044718

禁用二进制日志记录。我可以使用通用日志文件中的线程ID来标识查询：

251130 Query SHOW FIELDS FROM sessions 
251130 Query SELECT sessions.* FROM sessions WHERE sessions.session_id = 
'3d1d7f8638dbfd12ee58fa78d4f0998c' LIMIT 1 
251130 Query BEGIN 
251130 Query INSERT INTO sessions (session_id, data, created_at, 
updated_at) VALUES ('3d1d7f8638dbfd12ee58fa78d4f0998c', 
'BAh7BkkiDnJldHVybl90bwY6BkVGIgYv\n', '2016-01-04 10:48:52', '2016-01-04 
10:48:52') 
251130 Query COMMIT

应用程序生成会话标识。任何想法？
会话ID有什么问题以及如何解决冲突。

感谢

来源

2016-01-22 user2683906