(root@192.168.1.2) [(none)]> show slave status\GSlave_IO_Running: YesSlave_SQL_Running: NoReplicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1864Last_Error: Cannot schedule event Update_rows, relay-log name ./log-relaynew.000867, position 93464188 to Worker thread because its size 16777713 exceeds 16777216 of slave_pending_jobs_size_max.

#从last_sql_error 错误信息，可以看出是因为slave_pending_jobs_size_max 值引起的，默认值16777216，但是接收到的是16777713，所以导致主从同步停止。

(root@192.168.1.1) [(none)]> show variables like 'max_allowed_packet';
+--------------------+----------+
| Variable_name      | Value    |
+--------------------+----------+
| max_allowed_packet | 33554432 |
+--------------------+----------+
1 row in set (0.00 sec)

(root@192.168.1.2) [(none)]> stop slave;
Query OK, 0 rows affected (0.00 sec)

(root@192.168.1.2) [(none)]> set global slave_pending_jobs_size_max=52428800;
Query OK, 0 rows affected, 1 warning (0.00 sec)

(root@192.168.1.2) [(none)]> show variables like '%slave_pending_jobs%';
  +-----------------------------+----------+
  | Variable_name | Value |
  +-----------------------------+----------+
  | slave_pending_jobs_size_max | 52428800 |
  +-----------------------------+----------+
  1 row in set (0.01 sec)

(root@192.168.1.2) [(none)]> start slave;
Query OK, 0 rows affected (0.01 sec)

(root@192.168.1.2) [(none)]> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 192.168.1.1Master_User: replMaster_Port: 3306Connect_Retry: 60Master_Log_File: log-bin.001101Read_Master_Log_Pos: 210990225Relay_Log_File: log-relaynew.000869Relay_Log_Pos: 1111040Relay_Master_Log_File: log-bin.001101Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 210985256Relay_Log_Space: 3648409Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 141Master_UUID: 872aba0b-b543-11e6-9ce1-0cc47a581d8cMaster_Info_File: mysql.slave_master_infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: 872aba0b-b543-11e6-9ce1-0cc47a581d8c:532748990-581195316Executed_Gtid_Set: 1bf68f85-ef7c-11e8-bad9-0cc47abcef86:1-28,
872aba0b-b543-11e6-9ce1-0cc47a581d8c:1-581195316Auto_Position: 1Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version:
1 row in set (0.00 sec)