# ==== Purpose ====
#
# Test verifies that replicated transaction boundaries are set properly
# at receiving from master time.
#
# ==== Implementation ====
#
# A. Simulate an unnoticeable loss of Xid event to observe a slave error,
#    then restart slave to recover from the failure.
# B. Do the same to GTID event.
#
# ==== References ====
#
# MDEV-27697 slave must recognize incomplete replication event group 
#
--source include/have_binlog_format_mixed.inc
--source include/have_innodb.inc
--source include/have_debug.inc
--source include/master-slave.inc

--connection slave
call mtr.add_suppression("Unexpected break of being relay-logged GTID 0-27697-1000");
call mtr.add_suppression("Relay log write failure: could not queue event from master");
call mtr.add_suppression("The current group of events starts with a non-GTID");

--source include/stop_slave.inc
CHANGE MASTER TO MASTER_USE_GTID=slave_pos;
--source include/start_slave.inc

--connection master
CREATE TABLE t (a INT) ENGINE=innodb;
INSERT INTO t VALUES(1);
save_master_pos;

--echo ### A. Simulate an unnoticeable loss of Xid event
--sync_slave_with_master
SET @@global.debug_dbug="+d,slave_discard_xid_for_gtid_0_x_1000";

--connection master
SET @@gtid_seq_no=1000;
set @@server_id=27697;
INSERT INTO t VALUES(1000);
set @@server_id=default;
INSERT INTO t VALUES(1001);

--echo ## Prove the error occurs.
--connection slave
# ER_SLAVE_RELAY_LOG_WRITE_FAILURE
--let $slave_io_errno = 1595
--source include/wait_for_slave_io_error.inc
## EOP

--echo ## Prove the slave recovers after the simulation condtion is lifted.
SET @@global.debug_dbug=default;
--source include/start_slave.inc

--echo ### B. Do the same to GTID event.
--connection slave
SET @@global.debug_dbug="+d,slave_discard_gtid_0_x_1002";

--connection master
SET @@gtid_seq_no=1002;
set @@server_id=27697;
INSERT INTO t VALUES(1002);
set @@server_id=default;
INSERT INTO t VALUES(1003);

--echo ## Prove the error occurs.
--connection slave
# ER_SLAVE_RELAY_LOG_WRITE_FAILURE
--let $slave_io_errno = 1595
--source include/wait_for_slave_io_error.inc
## EOP

--echo ## Prove the slave recovers after the simulation condtion is lifted.
SET @@global.debug_dbug=default;
--source include/start_slave.inc

--connection master
save_master_pos;

--sync_slave_with_master
## EOP

--let $diff_tables=master:t,slave:t
--source include/diff_tables.inc

--echo "===== Clean up ====="
--connection slave
--source include/stop_slave.inc
CHANGE MASTER TO MASTER_USE_GTID=no;
--source include/start_slave.inc

--connection master
DROP TABLE t;
--source include/rpl_end.inc