Hi, thanks for the reply. yes, Exec_Master_Log_Pos: 967647646 stays always the same. I attaced a file with the data you requested. Seems there is a process stuck with "Waiting for table metadata lock ". Am 01.02.2021 um 11:32 schrieb andrei.elkin@pp.inet.fi:
Thomas <thomas@plant.systems> writes:
Hello, Howdy, Tomas.
we have upgraded our MySQL Master/Slave server vom 10.1.24 to 10.1.48 on 25.01. Backups worked as usual, but since friday (29.01.) our backups do not work anymore. I have seen that entering a 'stop slave;' on mysql cli hangs forever, while in the background (on a second console, I see the replication going on, but the gtid is far away from the master. According to MaxScale, on the slave it is '0-1-8696229561 So select @@global.gtid_slave_pos = 0-1-8696229561 remains all the time since
2021-02-01 8:45:40 140290041063168 [Note] Slave SQL thread initialized, starting replication in log 'mysql-bin.005586' at position 1073742303, relay log '/var/lib/mysql/relay-bin.000001' position: 4; GTID position '0-1-8696229561'
(paste from a followup mail)? And the same to Exec_Master_Log_Pos: 967647646 that also has not moved? As you mention backup, could it have been running to block slave thread(s).. Could you please make few selects:
#--connection slave show processlist; show slave status; select @@global.gtid_slave_pos; select @@global.slave_parallel_threads; select @@global.slave_parallel_mode;
It may be interesting to see what are events starting from mysql-bin.005587:967647646 unless it gets clear from show-processist results.
I'll try to help.
Cheers,
Andrei
and on the master '0-1-8705275411' and not moving forward on the slave.
Slave 'show slave status': MariaDB [(none)]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.1.1 Master_User: replication_user Master_Port: 3306 Connect_Retry: 10 Master_Log_File: mysql-bin.005595 Read_Master_Log_Pos: 581894706 Relay_Log_File: relay-bin.000002 Relay_Log_Pos: 693 Relay_Master_Log_File: mysql-bin.005587 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: 967647646 Relay_Log_Space: 8205026277 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: 1 Master_SSL_Crl: Master_SSL_Crlpath: Using_Gtid: Slave_Pos Gtid_IO_Pos: 0-1-8705427292 Replicate_Do_Domain_Ids: Replicate_Ignore_Domain_Ids: Parallel_Mode: optimistic 1 row in set (0.00 sec)
Master status is this: MariaDB [(none)]> show master status\G *************************** 1. row *************************** File: mysql-bin.005595 Position: 581594839 Binlog_Do_DB: Binlog_Ignore_DB: 1 row in set (0.01 sec)
If I try to stop the server it hangs also. Waited half an hour after I saw the backups hanging on the 'stop slave' command, then killed the server with kill -9. It restarted without complaining, but the hang is still occuring when doing a 'stop slave'. Can anybody help me diagnosing and possibly resolving this issue?