mysql错误集合
1.使用flush logs;报ERROR 1105 (HY000): Unknown error错误
报此错误是因为日志所在目录只有root有权限新建文件，从mysql客户端执行flush logs其实是以mysql这个账号去执行的，所以会权限不足
查看错误日志所在位置
mysql> show variables like '%log_error%';
+---------------------+-----------------------+
| Variable_name | Value |
+---------------------+-----------------------+
| binlog_error_action | IGNORE_ERROR |
| log_error | /data/mysql/mysql.log |
+---------------------+-----------------------+
2 rows in set (0.00 sec)
查看权限
[root@db02 mysql]# ll
total 44
-rw-r--r-- 1 root root 0 Apr 24 19:53 mysql.log
修改权限
[root@db02 mysql]# chown -R mysql. ./*
[root@db02 mysql]# ll
total 44
-rw-rw---- 1 mysql mysql 290 Apr 25 11:49 mysql-bin.index
-rw-r--r-- 1 mysql mysql 0 Apr 24 19:53 mysql.log
再重新flush logs就没有报此问题了
mysql> flush logs;
Query OK, 0 rows affected (0.00 sec)
2.使用GTID复制时，报Slave_SQL_Running停止时错误
错误如下：从库已有数据，此时再复制会报以下错误
mysql> show slave statusG
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.51
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 1444
Relay_Log_File: db03-relay-bin.000002
Relay_Log_Pos: 408
Relay_Master_Log_File: mysql-bin.000006
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1007
Last_Error: Error 'Can't create database 'oldboy'; database exists' on query. Default dat
abase: 'oldboy'. Query: 'create database oldboy' Skip_Counter: 0
Exec_Master_Log_Pos: 404
Relay_Log_Space: 1651
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: 1007
Last_SQL_Error: Error 'Can't create database 'oldboy'; database exists' on query. Default dat
abase: 'oldboy'. Query: 'create database oldboy' Replicate_Ignore_Server_Ids:
Master_Server_Id: 51
Master_UUID: 45984377-6897-11e9-8ce0-000c2938e32d
Master_Info_File: /application/mysql-5.6.42/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp: 190427 20:02:11
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 45984377-6897-11e9-8ce0-000c2938e32d:2-6
Executed_Gtid_Set: 45984377-6897-11e9-8ce0-000c2938e32d:1
Auto_Position: 1
解决方法：
mysql> reset master;
Query OK, 0 rows affected (0.00 sec)
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> reset slave;
Query OK, 0 rows affected (0.01 sec)
mysql> set global gtid_purged='45984377-6897-11e9-8ce0-000c2938e32d:2'; #事务日志后加1即可
Query OK, 0 rows affected (0.01 sec)
mysql> change master to master_host='10.0.0.51',master_user='repl',master_password='123' ,MASTER_AUTO_POSITI
ON=1;Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.51
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 1444
Relay_Log_File: db03-relay-bin.000002
Relay_Log_Pos: 1553
Relay_Master_Log_File: mysql-bin.000006
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 1444
Relay_Log_Space: 1756
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: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 51
Master_UUID: 45984377-6897-11e9-8ce0-000c2938e32d
Master_Info_File: /application/mysql-5.6.42/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 45984377-6897-11e9-8ce0-000c2938e32d:1:3-6
Executed_Gtid_Set: 45984377-6897-11e9-8ce0-000c2938e32d:1-6
Auto_Position: 1
1 row in set (0.00 sec)
ERROR:
No query specified
3.mha使用masterha_check_repl --conf=/etc/mha/app1.cnf 检查配置时报错
错误如下：
[root@db03 ~]# masterha_check_repl --conf=/etc/mha/app1.cnf
Sat Apr 27 23:33:29 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping
.Sat Apr 27 23:33:29 2019 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Sat Apr 27 23:33:29 2019 - [info] Reading server configuration from /etc/mha/app1.cnf..
Sat Apr 27 23:33:29 2019 - [info] MHA::MasterMonitor version 0.58.
Sat Apr 27 23:33:29 2019 - [error][/usr/share/perl5/vendor_perl/MHA/Server.pm, ln180] Got MySQL error when c
onnecting 10.0.0.53(10.0.0.53:3306) :1045:Access denied for user 'mha'@'db03' (using password: YES), but this is not a MySQL crash. Check MySQL server settings.Sat Apr 27 23:33:29 2019 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln301] at /usr/share/
perl5/vendor_perl/MHA/ServerManager.pm line 297.Sat Apr 27 23:33:30 2019 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln309] Got fatal error
, stopping operationsSat Apr 27 23:33:30 2019 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln427] Error happened
on checking configurations. at /usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm line 329.Sat Apr 27 23:33:30 2019 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln525] Error happened
on monitoring servers.Sat Apr 27 23:33:30 2019 - [info] Got exit code 1 (Not master dead).
MySQL Replication Health is NOT OK!
解决方法：
需要将每个数据库里的空用户进行删除，如root@db01,''@'db01'等用户，因主机名不同此处的用户也不同
mysql> select user,host,password from mysql.user;
+------+-----------+----------+
| user | host | password |
+------+-----------+----------+
| root | localhost | |
| root | db01 | |
| root | 127.0.0.1 | |
| root | ::1 | |
| | localhost | |
| | db01 | |
+------+-----------+----------+
mysql> drop user root@'db01';
Query OK, 0 rows affected (0.00 sec)
mysql> drop user ''@'db01';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
4.redis cluster错误
重新添加已删除的节点时，报此错误
[ERR] Node 10.0.0.51:7007 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.
解决方法：
[root@db01 7007]# redis-cli -h 10.0.0.51 -p 7007 # 连接到redis
10.0.0.51:7007> flushdb # 清空数据
OK
10.0.0.51:7007>
10.0.0.51:7007>
10.0.0.51:7007> cluster reset # 重置cluster
再重新添加节点即可