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# ==== Purpose ==== # # The purpose of this script is to test if there isn't any double-free # corruption when a Rows_query_event is retried by the MTA. # # ==== Requirements ==== # # R1. After a Rows_log_event is retried, the event is re-read from the # relay log but the reference to the original event shouldn't be # disposed during context cleanup because is further accessed. # # ==== Implementation ==== # # 1. Enable `binlog_rows_query_log_events` option. # 2. On the source, create a table. # 3. On the source, insert a record into the table. # 4. On the replica, activate a debug symbol that will force failure while # applying Rows_query_event 3 times. # 5. On the replica, wait for a debug sync signal that notifies that the # Rows_query_event was sucessfully applied. # 6. On the replica, remove the debug point and sync with the source. # 7. Clean up. # # ==== References ==== # # BUG#32590974 MTS: SEGFAULT OR HEAP-USE-AFTER-FREE IN # SLAVE_WORKER_EXEC_JOB_GROUP # --source include/have_debug_sync.inc --source include/have_binlog_format_row.inc --source include/only_mts_slave_parallel_workers.inc --let $option_name = slave_transaction_retries --let $option_operator = > --let $option_value = 2 --source include/only_with_option.inc --source include/master-slave.inc # 1. Enable `binlog_rows_query_log_events` option. --let $saved_binlog_rows_query_log_events = `SELECT @@SESSION.binlog_rows_query_log_events` SET SESSION binlog_rows_query_log_events = ON; # 2. On the source, create a table. CREATE TABLE t1 (c1 INT PRIMARY KEY, c2 INT, INDEX(c2)) ENGINE = InnoDB; --source include/sync_slave_sql_with_master.inc --source include/stop_slave.inc # 3. On the source, insert a record into the table. --source include/rpl_connection_master.inc INSERT INTO t1 VALUES (0, 0); # 4. On the replica, activate a debug symbol that will force failure while # applying Rows_query_event 3 times. --source include/rpl_connection_slave.inc --let $debug_point = error_on_rows_query_event_apply --source include/add_debug_point.inc --source include/start_slave.inc # 5. On the replica, wait for a debug sync signal that notifies that the # Rows_query_event was sucessfully applied. SET DEBUG_SYNC = "now WAIT_FOR end_retries_on_rows_query_event_apply"; # 6. On the replica, remove the debug point and sync with the source. --source include/rpl_connection_master.inc --source include/sync_slave_sql_with_master.inc --let $debug_point = error_on_rows_query_event_apply --source include/remove_debug_point.inc # 7. Clean up. --source include/rpl_connection_master.inc DROP TABLE t1; --replace_result $saved_binlog_rows_query_log_events BINLOG_ROWS_QUERY_LOG_EVENTS --eval SET SESSION binlog_rows_query_log_events = $saved_binlog_rows_query_log_events --source include/rpl_end.inc