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本文主要给大家介绍MySQL主从复制出现报错Errno1205解决方案，文章内容都是笔者用心摘选和编辑的，具有一定的针对性，对大家的参考意义还是比较大的，下面跟笔者一起了解下MySQL主从复制出现报错Errno1205解决方案吧。
nagios报警如下大致意思就是
14:39分 vip发生了漂移
**** Nagios ***** Notification Type: PROBLEM Service: check_ha_mysqld Host: prod-bjuc-mysql1-vip Address: 192.168.87.74 State: CRITICAL Date/Time: Wed Mar 28 14:39:27 CST 2018 Additional Info: CRITICAL: HA Failover from 192.168.87.72 to 192.168.87.123, 192.168.87.123 result:PROCS OK: 1 processes with command name /usr/sbin/mysqld, args VIP=192.168.87.74, 192.168.87.72:PROCS OK: 1 processes with command name /usr/sbin/mysqld
14:46分主从复制中断
***** Nagios ***** Notification Type: PROBLEM Service: check_mysql_health_slave-sql-running Host: bjuc-mysql1 Address: 192.168.87.72 State: CRITICAL Date/Time: Wed Mar 28 14:46:06 CST 2018 Additional Info: CRITICAL - Slave sql is not running
登录数据库云服务器查看主从复制的状态，发现报错1205错
mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.87.123 Master_User: zhu Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000481 Read_Master_Log_Pos: 218802975 Relay_Log_File: mysql-relay-bin.000428 Relay_Log_Pos: 2428110 Relay_Master_Log_File: mysql-bin.000481 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: performance_schema,information_schema,test,mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: %.% Replicate_Wild_Ignore_Table: Last_Errno: 1205 Last_Error: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)' Skip_Counter: 0 Exec_Master_Log_Pos: 182088298 Relay_Log_Space: 39142986 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 1205 Last_SQL_Error: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)' Replicate_Ignore_Server_Ids: Master_Server_Id: 6 1 row in set (0.00 sec)
查看错误日志有一下报错信息：
错误日志中给出了报错原因和解决方法
tail -70 error.log
180328 14:36:05 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:36:21 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:36:38 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:36:56 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:37:15 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:37:35 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:37:56 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:38:17 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:38:38 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:38:59 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:39:20 [ERROR] Slave SQL: Error 'Lock wait timeout exceeded; try restarting transaction' on query. Default database: 'statusnet'. Query: 'UPDATE notice_status_new set valid = 0 WHERE conversation = 384667 AND user_id IN(4337475,4337529,4337471,4337365)', Error_code: 1205 180328 14:39:20 [ERROR] Slave SQL thread retried transaction 10 time(s) in vain, giving up. Consider raising the value of the slave_transaction_retries variable. 180328 14:39:20 [Warning] Slave: Lock wait timeout exceeded; try restarting transaction Error_code: 1205 180328 14:39:20 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000481' position 182088298
查看参数结合着两个参数可以知道主从复制报错的原因为：
180328 14:39:20 [ERROR] Slave SQL thread retried transaction 10 time(s) in vain, giving up. Consider raising the value of the slave_transaction_retries variable.
180328 14:39:20 [Warning] Slave: Lock wait timeout exceeded; try restarting transaction Error_code: 1205
180328 14:39:20 [ERROR] Error running query, slave SQL thread aborted，Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000481' position 182088298
因为表notice_status_new产生了锁，阻塞了这条update语句
参数innodb_lock_wait_time 设置的为15秒，单个事务在等待15秒后开始报1025错：因为锁执行超时并重启事务
参数slave_transaction_retries 设置的为10次，如果事务重试次数超过10次，复制中断。（但是错误日志中尝试了11次）
mysql> show variables like '%innodb_lock_wait_timeout%'; +--------------------------+-------+ | Variable_name | Value | +--------------------------+-------+ | innodb_lock_wait_timeout | 15 | +--------------------------+-------+ 1 row in set (0.01 sec) mysql> show variables like '%slave_transaction_retries%'; +---------------------------+-------+ | Variable_name | Value | +---------------------------+-------+ | slave_transaction_retries | 10 | +---------------------------+-------+ 1 row in set (0.00 sec)
解决方法：重启slave后主从复制恢复，并开始追日志
mysql> stop slave; Query OK, 0 rows affected (0.02 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status\G *************************** 1. row *************************** Slave_IO_Running: Yes Slave_SQL_Running: Yes 1 row in set (0.00 sec)
vip的问题等到晚上在切回来，
---------------------------------我是分割线--------------------------
这次问题虽然解决了，但是发现问题我们一定要找到根音，这样问题才能算是闭环。
为什么会产生这个锁呢，因为记录锁信息的表都是实时的，现在查不出当时的锁信息，但是从存储引擎的运行状态中还是能发现一些问题，数据库出现了死锁！！显然在update这张表一定会等待的！！
发现了一条奇葩SQL，被锁的那张表也是notice_status_new
UPDATE notice_status_new SET count = count + 1, push_count = push_count + 1 WHERE conversation = 2609759 AND user_id != 7384662 AND user_id IN(7359498)
show engine innodb status\G 截取死锁的这部分 ------------------------ LATEST DETECTED DEADLOCK ------------------------ 180328 14:33:52 *** (1) TRANSACTION: TRANSACTION 1B285E9F9, ACTIVE 0 sec starting index read mysql tables in use 1, locked 1 LOCK WAIT 4 lock struct(s), heap size 1248, 3 row lock(s), undo log entries 1 MySQL thread id 3972036, OS thread handle 0x7fc0c3464700, query id 2525495433 192.168.87.42 dstatusnet Updating UPDATE notice_status_new SET count = count + 1, push_count = push_count + 1 WHERE conversation = 2609759 AND user_id != 7384662 AND user_id IN(7359498) *** (1) WAITING FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 3535 page no 65360 n bits 448 index `conv_user` of table `statusnet`.`notice_status_new` trx id 1B285E9F9 lock_mode X locks rec but not gap waiting Record lock, heap no 241 PHYSICAL RECORD: n_fields 3; compact format; info bits 0 0: len 8; hex 000000000027d25f; asc ' _;; 1: len 4; hex 80704c0a; asc pL ;; 2: len 4; hex 80b1a0fe; asc ;; *** (2) TRANSACTION: TRANSACTION 1B285E9FD, ACTIVE 0 sec starting index read, thread declared inside InnoDB 500 mysql tables in use 1, locked 1 4 lock struct(s), heap size 1248, 3 row lock(s), undo log entries 1 MySQL thread id 3867908, OS thread handle 0x7fbfc6d4f700, query id 2525495437 192.168.87.42 dstatusnet Updating UPDATE notice_status_new SET count = count + 1, push_count = push_count + 1 WHERE conversation = 2609759 AND user_id != 7359498 AND user_id IN(7384662) *** (2) HOLDS THE LOCK(S): RECORD LOCKS space id 3535 page no 65360 n bits 448 index `conv_user` of table `statusnet`.`notice_status_new` trx id 1B285E9FD lock_mode X locks rec but not gap Record lock, heap no 241 PHYSICAL RECORD: n_fields 3; compact format; info bits 0 0: len 8; hex 000000000027d25f; asc ' _;; 1: len 4; hex 80704c0a; asc pL ;; 2: len 4; hex 80b1a0fe; asc ;; *** (2) WAITING FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 3535 page no 65360 n bits 448 index `conv_user` of table `statusnet`.`notice_status_new` trx id 1B285E9FD lock_mode X locks rec but not gap waiting Record lock, heap no 242 PHYSICAL RECORD: n_fields 3; compact format; info bits 0 0: len 8; hex 000000000027d25f; asc ' _;; 1: len 4; hex 8070ae56; asc p V;; 2: len 4; hex 80b1a0fc; asc ;; *** WE ROLL BACK TRANSACTION (2)
问题找到了，找对该业务的开发，沟通后决定在周六上线新版本，彻底解决问题。
可以写一个实时监控锁的脚本，把内容输出打印，这样方便以后定位问题！
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后面想了想可能是由于vip漂移导致的主从复制报错
线上架构为MM+heartbeat
vip漂移的原因待定，vip漂移后，数据库开始在192.168.87.123云服务器上写入数据库，72数据库作为备份库，但是还会同步123数据库的数据，由于192.168.87.72数据库表notice_status_new还存在死锁，所以在slave SQL thread应用来自123云服务器的中继日志时，执行到该SQL时，发生了锁等待，等待15秒后超时并重新尝试该事务，尝试10后，还是在锁表状态，slave SQL thread 线程停止工作，主从同步中断。
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3月29日和开发复盘
因为报警时间不是很准确，实际时间还是以heartbeat日志和mysql日志为准，通过查看日志确定是heartbeat首先发生漂移，然后才是主从复制报错
主要是讨论的问题有两个
① Heartbeat为什么会发生漂移
通过查看heartbeat日志，72和123存在心跳检测，在72ping123的时候发生了丢包，
在123ping72的时候正常，72节点以为自己死掉？在14:35:26发生vip漂移，从72漂移到123。
Mar 28 14:35:26 bjuc-mysql1 pengine: [14176]: notice: LogActions: Move VIP_192_168_87_74 (Started bjuc-mysql1 -> prod-uc-yewu-db-slave2)
② 为什么会出现死锁
从存储引擎的运行状态中查看，如果这两条SQL的请求同时到达数据库，因为innodb支持到行锁的粒度，第二条SQL会锁住很多行，如果和第一条SQL中锁住有重复的，就会发生相互等待的状况，所以出现死锁。
这两条SQL的where条件如下：
user_id IN(6032694,5824664,4344233,5450840,6032678,4951596,6032668,4344453,6038786,4344347,6032676,5754768);
user_id != 6185996
这两个条件可能发生逻辑上的冲突，然后导致死锁
看完以上关于MySQL主从复制出现报错Errno1205解决方案，很多读者朋友肯定多少有一定的了解，如需获取更多的行业知识信息 ，可以持续关注我们的行业资讯栏目的。
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