pt-slave-restart跳过复制错误

从库报错,错误号为1062,违反唯一性约束

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.56.92
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000066
          Read_Master_Log_Pos: 554
               Relay_Log_File: relaylog.000214
                Relay_Log_Pos: 317
        Relay_Master_Log_File: binlog.000063
             Slave_IO_Running: Yes
            Slave_SQL_Running: No
              Replicate_Do_DB:
          Replicate_Ignore_DB: information_schema,performance_schema
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 1062
                   Last_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction 'cec9239c-4aa7-11e8-80b8-080027e9c966:13000740' at master log binlog.000063, end_log_pos 3625. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 2744
              Relay_Log_Space: 3625921578
              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: 0
                Last_IO_Error:
               Last_SQL_Errno: 1062
               Last_SQL_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction 'cec9239c-4aa7-11e8-80b8-080027e9c966:13000740' at master log binlog.000063, end_log_pos 3625. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 2
                  Master_UUID: cec9239c-4aa7-11e8-80b8-080027e9c966
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State:
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp: 180518 19:40:14
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set: cec9239c-4aa7-11e8-80b8-080027e9c966:13000738-13100742
            Executed_Gtid_Set: 4873eeea-4114-11e8-a25a-080027aeb704:1-4,
cec9239c-4aa7-11e8-80b8-080027e9c966:7000683-13000739
                Auto_Position: 0
         Replicate_Rewrite_DB:
                 Channel_Name:
           Master_TLS_Version:
1 row in set (0.00 sec)


ERROR:
No query specified

尝试用pt-slave-restart跳过该错误

[root@pxc01 percona-toolkit-3.0.3]# pt-slave-restart --error-numbers=1062 -h localhost -uroot -pmysql
Can't locate Digest/MD5.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/local/bin/pt-slave-restart line 4261.
BEGIN failed--compilation aborted at /usr/local/bin/pt-slave-restart line 4261.

缺少安装了包，安装之。
yum -y install perl-Digest-MD5



再次执行

[root@pxc01 /]# pt-slave-restart --error-numbers=1062 -h localhost -uroot -pmysql -S /tmp/mysql.sock   
Cannot skip transactions properly because GTID is enabled and slave_parallel_workers > 0.  See 'GLOBAL TRANSACTION IDS' in the tool's documentation.

报错误，因为slave_parallel_workers 大于0，查看当前slave_parallel_workers=8

mysql> show variables like '%slave_parallel_workers%';
+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| slave_parallel_workers | 8     |
+------------------------+-------+
1 row in set (0.00 sec)

先设置0，设置slave_parallel_workers=0

mysql> set global slave_parallel_workers=0;

[root@pxc01 /]# pt-slave-restart --error-numbers=1062 -h localhost -uroot -pmysql -S /tmp/mysql.sock
2018-05-18T20:54:55 S=/tmp/mysql.sock,h=localhost,p=...,u=root relaylog.000214         317 1062 
2018-05-18T20:54:56 S=/tmp/mysql.sock,h=localhost,p=...,u=root relaylog.000214        1229 1062 

执行成功，查看复制情况:

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.56.92
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000066
          Read_Master_Log_Pos: 554
               Relay_Log_File: relaylog.000219
                Relay_Log_Pos: 761
        Relay_Master_Log_File: binlog.000066
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB: information_schema,performance_schema
           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: 554
              Relay_Log_Space: 3625921578
              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: 2
                  Master_UUID: cec9239c-4aa7-11e8-80b8-080027e9c966
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set: cec9239c-4aa7-11e8-80b8-080027e9c966:13000738-13100742
            Executed_Gtid_Set: 4873eeea-4114-11e8-a25a-080027aeb704:1-4,
cec9239c-4aa7-11e8-80b8-080027e9c966:7000683-13100742
                Auto_Position: 0
         Replicate_Rewrite_DB:
                 Channel_Name:
           Master_TLS_Version:
1 row in set (0.01 sec)


ERROR:
No query specified

已经恢复正常了,将slave_parallel_workers恢复回原来的值.
mysql> set global slave_parallel_workers=8;
Query OK, 0 rows affected (0.00 sec)

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