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We are seeing deadlocks on slave sql thread, during the backup, it causes the slave_sql_thread to stuck. Affected version is 10.6.11
show processlist;
==================================================
| 3994 |
system user |
|
bankfrm |
Slave_worker |
47515 |
Waiting for prior transaction to commit |
XA COMMIT ... |
0.000 |
| 3996 |
system user |
|
NULL |
Slave_worker |
47515 |
Waiting for prior transaction to commit |
NULL |
0.000 |
| 3995 |
system user |
|
NULL |
Slave_worker |
47515 |
Waiting for prior transaction to commit |
NULL |
0.000 |
| 3997 |
system user |
|
NULL |
Slave_worker |
47515 |
Waiting for prior transaction to commit |
NULL |
0.000 |
| 3991 |
system user |
|
NULL |
Slave_SQL |
44523 |
Waiting for room in worker thread event queue |
NULL |
0.000 |
| 5114 |
...... |
10.93.99.158:52012 |
NULL |
Query |
0 |
Optimizing |
SELECT Event_schema, Event_name FROM information_schema.EVENTS WHERE Status = 'ENABLED' |
0.000 |
| 715112 |
..oper |
localhost |
NULL |
Query |
47515 |
Waiting for backup lock |
BACKUP STAGE BLOCK_COMMIT |
0.000 |
| 724545 |
....frm |
10.93.97.49:44948 |
....frm |
Query |
2291 |
Waiting for backup lock |
XA ROLLBACK ... |
0.000 |
| 751381 |
....frm |
10.93.97.50:46208 |
....frm |
Query |
1310 |
Waiting for backup lock |
XA ROLLBACK ... |
0.000 |
| 752581 |
myoper |
localhost |
NULL |
Query |
0 |
starting |
show processlist |
0.000 |
==================================================
Show replica status\G
Connection_name:
Slave_SQL_State: Slave has read all relay log; waiting for more updates
Slave_IO_State: Waiting for master to send event
Master_Host: 10.93.99.101
Master_User: ......
Master_Port: 6603
Connect_Retry: 10
Master_Log_File: bin_log.001019
Read_Master_Log_Pos: 30985295
Relay_Log_File: relay_log.000131
Relay_Log_Pos: 2570503
Relay_Master_Log_File: bin_log.001019
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: 2570206
Relay_Log_Space: 31275705
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: 162
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: 2
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: Slave_Pos
Gtid_IO_Pos: 1-2-6301093730
Replicate_Do_Domain_Ids:
Replicate_Ignore_Domain_Ids:
Parallel_Mode: optimistic
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Slave_DDL_Groups: 46
Slave_Non_Transactional_Groups: 19
Slave_Transactional_Groups: 23249343
Retried_transactions: 1
Max_relay_log_size: 268435456
Executed_log_entries: 86984839
Slave_received_heartbeats: 78647
Slave_heartbeat_period: 5.000
Gtid_Slave_Pos: 1-2-6301025975
==================================================
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| Thread 715112 IS LOCKED BY Thread 715112 |
| Thread 715112 IS LOCKED BY Thread 3994 |
| Thread 715112 IS LOCKED BY Thread 3993 |
| Thread 3993 IS LOCKED BY Thread 715112 |
| Thread 3993 IS LOCKED BY Thread 3994 |
| Thread 3993 IS LOCKED BY Thread 3993 |
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perf_mon_20230112_033302.log