MySQL双主io线程起不来_解决master and slave have equal MySQL server UUIDs导致Slave_IO_thread起不来问题...
今天在部署mysql主從復(fù)制時(shí)遇到個(gè)小問(wèn)題
在配置完所有步驟后,想在主庫(kù)插入數(shù)據(jù)測(cè)試從庫(kù)又沒(méi)復(fù)制
結(jié)果發(fā)現(xiàn)從庫(kù)沒(méi)有反應(yīng)。
這時(shí)查了一下從庫(kù)的狀態(tài),如下:
root@localhost:mysql.sock ?04:43:35 [lala]>show slave status\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 192.168.161.128
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mybinlog.000004
Read_Master_Log_Pos: 331
Relay_Log_File: mysql-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mybinlog.000004
Slave_IO_Running: No
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: 331
Relay_Log_Space: 120
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: 1593
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 203306
Master_UUID:
Master_Info_File: /data/mysql/mytest_3306/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: 161207 04:40:45
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
從我標(biāo)粗體部分的信息可以清楚地看到Slave_IO_Running參數(shù)為no,這說(shuō)明Slave_IO_thread沒(méi)有起來(lái)
錯(cuò)誤原因也給出了Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.
master和slave有同一個(gè)UUIDs導(dǎo)致線程停止,該線程需要將兩個(gè)線程改成不一樣才能工作。
這時(shí)查一下兩個(gè)庫(kù)的UUIDs
root@localhost:mysql.sock ?06:13:40 [(none)]>show variables like '%UUID%'
-> ;
+---------------+--------------------------------------+
| Variable_name | Value ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?|
+---------------+--------------------------------------+
| server_uuid ? | af3609-b426-11e6-9ff3-000c29d55626 |
+---------------+--------------------------------------+
1 row in set (0.00 sec)
發(fā)現(xiàn)都是af3609-b426-11e6-9ff3-000c29d55626
這時(shí)修改刪除slave庫(kù)中的auto.cnf文件即可,該文件就在mysql的datadir下
因?yàn)閁UID參數(shù)讀的就是該文件下的內(nèi)容,刪除后,mysql會(huì)重新生成新的uuid?;蛘卟粍h除直接改變?cè)撐募膸讉€(gè)數(shù)字。
刪除完后重啟mysql服務(wù)器,再開(kāi)啟主從復(fù)制,發(fā)現(xiàn)狀態(tài)正常了
ps:兩個(gè)auto.cnf一樣的原因是因?yàn)槲业膹膸?kù)是直接拷貝主庫(kù),所以auto.cnf自然相同了!!!
來(lái)自 “ ITPUB博客 ” ,鏈接:http://blog.itpub.net/31386161/viewspace-2129967/,如需轉(zhuǎn)載,請(qǐng)注明出處,否則將追究法律責(zé)任。
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