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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_replica_parallel_workers.inc
--let $option_name = replica_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
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