Ajout Lire les erreurs de réplication, pour une réplication par Channel
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@ -620,3 +620,104 @@ En cas de `Can't make changes on the master because no unique index exists`. On
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~~~
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# pt-table-sync --execute --no-check-slave localhost slave
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~~~
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## Lire les erreurs de réplication, pour une réplication par Channel, ou Group réplication.
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Dans le cas d'une réplication par channel, ou Group Réplication, la sortie de `SHOW SLAVE STATUS\G' indique sur quels Channel il y a une erreur, mais sans forcément indiqué de manière explicite l'erreur en question.
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Exemple :
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~~~
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mysql> SHOW SLAVE STATUS\G
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.....
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Exec_Master_Log_Pos: 18089090
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Relay_Log_Space: 1104382466
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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Seconds_Behind_Master: NULL
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 0
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Last_IO_Error:
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Last_SQL_Errno: 1064
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Last_SQL_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction 'ANONYMOUS' at master log mysql-bin.000807, end_log_pos 18089265. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 62
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Master_UUID:
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Master_Info_File: mysql.slave_master_info
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SQL_Delay: 0
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SQL_Remaining_Delay: NULL
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Slave_SQL_Running_State:
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Master_Retry_Count: 86400
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Master_Bind:
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Last_IO_Error_Timestamp:
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Last_SQL_Error_Timestamp: 200703 10:56:11
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Retrieved_Gtid_Set:
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Executed_Gtid_Set:
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Auto_Position: 0
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Replicate_Rewrite_DB:
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Channel_Name: su6-sql2
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Master_TLS_Version:
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Master_public_key_path:
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Get_master_public_key: 0
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Network_Namespace:
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~~~
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On vois que la réplication sur le Channel nommée su6-sql2 est en erreur, mais on ne sait pas sur quelle requête.
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Le message d'erreur suggère de regarder les logs d'erreurs dans la table performance_schema.replication_applier_status_by_worker.
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On peu le faire comme ceci, en indiquant le Channel en erreur, et le numéro du Worker, comme indiqué dans le message d'erreur précédent:
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Exemple :
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~~~
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mysql> SELECT * FROM performance_schema.replication_applier_status_by_worker WHERE WORKER_ID=1 AND CHANNEL_NAME='su6-sql2'\G;
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*************************** 1. row ***************************
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CHANNEL_NAME: su6-sql2
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WORKER_ID: 1
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THREAD_ID: NULL
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SERVICE_STATE: OFF
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LAST_ERROR_NUMBER: 1064
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LAST_ERROR_MESSAGE: Worker 1 failed executing transaction 'ANONYMOUS' at master log mysql-bin.000807, end_log_pos 18089265; Error 'You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=1' at line 1' on query. Default database: 'DB_content_cfbe'. Query: 'delete from toppops_cfbe_null_20200702_104153_V220 where rank=1'
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LAST_ERROR_TIMESTAMP: 2020-07-03 10:56:11.801803
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LAST_APPLIED_TRANSACTION:
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LAST_APPLIED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
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LAST_APPLIED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
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LAST_APPLIED_TRANSACTION_START_APPLY_TIMESTAMP: 0000-00-00 00:00:00.000000
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LAST_APPLIED_TRANSACTION_END_APPLY_TIMESTAMP: 0000-00-00 00:00:00.000000
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APPLYING_TRANSACTION:
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APPLYING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
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APPLYING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP: 0000-00-00 00:00:00.000000
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APPLYING_TRANSACTION_START_APPLY_TIMESTAMP: 0000-00-00 00:00:00.000000
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LAST_APPLIED_TRANSACTION_RETRIES_COUNT: 0
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LAST_APPLIED_TRANSACTION_LAST_TRANSIENT_ERROR_NUMBER: 0
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LAST_APPLIED_TRANSACTION_LAST_TRANSIENT_ERROR_MESSAGE:
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LAST_APPLIED_TRANSACTION_LAST_TRANSIENT_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
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APPLYING_TRANSACTION_RETRIES_COUNT: 0
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APPLYING_TRANSACTION_LAST_TRANSIENT_ERROR_NUMBER: 0
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APPLYING_TRANSACTION_LAST_TRANSIENT_ERROR_MESSAGE:
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APPLYING_TRANSACTION_LAST_TRANSIENT_ERROR_TIMESTAMP: 0000-00-00 00:00:00.000000
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1 row in set (0.01 sec)
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ERROR:
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No query specified
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~~~
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Comme ça on peux voir l'erreur explicite :
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~~~
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Error 'You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=1' at line 1' on query. Default database: 'DB_content_cfbe'. Query: 'delete from toppops_cfbe_null_20200702_104153_V220 where rank=1'
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~~~
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