A simple master－to－slave replication is currently being used. The following information is extracted from the SHOW SLAVE STATUS output:Last_SQL_Error: Error 'Duplicate entry '8' for key 'PRIMARY A.SET GTID_NEXT=CONSISTENCY; BEGIN; COMMIT; SET GTID_NEXT=AUTOMATICB.SET GLOBAL enforce_gtid_consistency=ONC.SET GTID_EXECUTED=38f32e23480a7-32a1-c323f78067fd37821 : 9D.SET GTID_NEXT=38f32e23480a7-32a1-c323f78067fd37821 : 9; BEGIN; COMMIT; SET GTID_NEXT=AUTOMATICE.SET GLOBAL SQL_SKIP_SLAVE_COUNTER=1
A simple master－to－slave replication is currently being used. The following information is extracted from the SHOW SLAVE STATUS output:Last_SQL_Error: Error 'Duplicate entry '8' for key 'PRIMARY
A.SET GTID_NEXT="CONSISTENCY"; BEGIN; COMMIT; SET GTID_NEXT="AUTOMATIC"
B.SET GLOBAL enforce_gtid_consistency=ON
C.SET GTID_EXECUTED="38f32e23480a7-32a1-c323f78067fd37821 : 9"
D.SET GTID_NEXT="38f32e23480a7-32a1-c323f78067fd37821 : 9"; BEGIN; COMMIT; SET GTID_NEXT="AUTOMATIC"
E.SET GLOBAL SQL_SKIP_SLAVE_COUNTER=1
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A MySQL replication slave is set up as follows: User all InnoDB tablesReceives ROW-based binary logs Has the read-only optionThe replication slave has been found in an error state.You check the MySQL error log file and find the following entries:2013-08-27 13:55:44 9056 [ERROR] Slave SQL: Could not execute Write_rows event on table test.tl; Duplicate entry ‘3’ for key’PRIMARY’ , Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event’s master log 56_master-bin.000003, end_log_pas 653, Error_code: 10622013-08-27 13:55:44 9056 [Warning] Salve: Duplicate entry ‘3’ for key ‘PRIMARY’Error_code: 10622013-08-27 13:55:44 9056 [ERROR] Error running query, slave SQL thread aborted. Fix theproblem, and restart the slave SQL thread with SLAVE START”, We stopped at log ‘56_masterbin.000003’ position 496 What are two possible causes for this error to occur?（）A.The slave was created with mysqldump –u root –p – skip-lock-table—all-databases /data/data.sqlB.The slave user does have INSERT, UPDATE, or DELETE permission and cannot execute the write_rows functionC.For tables with UNIQUE keys, statement-based replication must be used maintain integrityD.The root user on the slave has executed FLUSH LOGS, causing the relay-log to doublewriteE.The applications have the SUPER privilege, which allows them to update rows
ROW-based replication has stopped working. You investigate the error log file and find the following entries: 2013-08-27 14:15:47 9056 [ERROR] Slave SQL: Could not execute Delete_rows event on table test.t1;Can‘t find record in ‘t1‘, Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event‘s master log 56_master-bin. 000003, end_log_pos 851, Error_code: 10322013-08-27 14:15:47 9056 [warning] Slave: Can‘t find record in ‘t1‘ Error_code: 10322013-08-27 14:15:47 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with SLAVE START.We stopped at log ‘56_masterbin. 000003‘ position 684 Why did you receive this error?（）A.The slave SQL thread does not have DELETE privileges to execute on test.t1 table.sB.The table definition on the slave -litters from the masterC.Multi-threaded replication slaves can have temporary errors occurring for cross database updatesD.The slave SQL thread attempted to remove a row from the test.t1 table, but the row did not exist
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