Description:
I built the replication architecture as follows：
A<->B
use semi-replication.
master A:
+-------------------------------------------+------------+
| Variable_name | Value |
+-------------------------------------------+------------+
| rpl_semi_sync_master_enabled | ON |
| rpl_semi_sync_master_timeout | 1000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_for_slave_count | 1 |
| rpl_semi_sync_master_wait_no_slave | ON |
| rpl_semi_sync_master_wait_point | AFTER_SYNC |
| rpl_semi_sync_slave_enabled | ON |
| rpl_semi_sync_slave_trace_level | 32 |
+-------------------------------------------+------------+
master B:
-------------------------------------------+------------+
| Variable_name | Value |
+-------------------------------------------+------------+
| rpl_semi_sync_master_enabled | ON |
| rpl_semi_sync_master_timeout | 1000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_for_slave_count | 1 |
| rpl_semi_sync_master_wait_no_slave | ON |
| rpl_semi_sync_master_wait_point | AFTER_SYNC |
| rpl_semi_sync_slave_enabled | ON |
| rpl_semi_sync_slave_trace_level | 32 |
+-------------------------------------------+------------+
When I execute stop slave on A:
root@localhost:(none) 5.7.22-log 02:47:10> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
Error log output on A:
2019-12-26T14:34:06.697490+08:00 33 [Note] Error reading relay log event for channel '': slave SQL thread was killed
2019-12-26T14:34:06.699904+08:00 32 [Note] Slave I/O thread killed while reading event for channel ''
2019-12-26T14:34:06.699967+08:00 32 [Note] Slave I/O thread exiting for channel '', read up to log 'mysql-bin.000002', position 2500
Error log output on B:
2019-12-26T14:34:06.699936+08:00 0 [ERROR] /usr/local/mysql/bin/mysqld: Got an error reading communication packets
2019-12-26T14:34:39.670314+08:00 8 [Note] Stop semi-sync binlog_dump to slave (server_id: 2102453317)
2019-12-26T14:34:39.670621+08:00 8 [Note] Aborted connection 8 to db: 'unconnected' user: 'repl' host: '192.168.210.245' (failed on flush_net())
When I stop semi-synchronous replication,there is no "Got an error reading communication packets" log.Only the following information：
root@localhost:(none) 5.7.22-log 02:56:31> set global rpl_semi_sync_slave_enabled=off;
Query OK, 0 rows affected (0.00 sec)
2019-12-26T14:57:56.903323+08:00 10 [Note] Stop asynchronous binlog_dump to slave (server_id: 2102453317)
2019-12-26T14:57:56.903580+08:00 10 [Note] Aborted connection 10 to db: 'unconnected' user: 'repl' host: '192.168.210.245' (failed on flush_net())
Is this normal？
How to repeat:
see description
