include/master-slave.inc
[connection master]
connection slave;
include/stop_slave.inc
CHANGE MASTER TO MASTER_USE_GTID=NO;
include/start_slave.inc
include/stop_slave.inc
SET @save_dbug= @@GLOBAL.debug_dbug;
SET @@global.debug_dbug="+d,pause_sql_thread_on_relay_fde_after_trans";
SET @@global.debug_dbug="+d,negate_clock_diff_with_master";
include/start_slave.inc
# Future events must be logged at least 2 seconds after
# the slave starts
connection master;
# Write events to ensure slave will be consistent with master
create table t1 (a int);
insert into t1 values (1);
# Flush logs on master forces slave to generate a Format description
# event in its relay log
flush logs;
connection slave;
# On the next FDE, the slave should have the master CREATE/INSERT events
SET DEBUG_SYNC='now WAIT_FOR paused_on_fde';
select count(*)=1 from t1;
count(*)=1
1
# The relay log FDE has been processed - here we check to ensure it was
# not considered in Seconds_Behind_Master calculation
connection slave1;
# Safely resume slave SQL thread
# Prove SQL thread is in state "debug sync point: now"
SET @@global.debug_dbug="-d,pause_sql_thread_on_fde";
SET DEBUG_SYNC='now SIGNAL sql_thread_continue';
# Wait for SQL thread to continue into normal execution
SET DEBUG_SYNC='RESET';
#
# MDEV-29639
# When receiving an event after the SQL Thread idles,
# Seconds_Behind_Master should not update before it updates
# last_master_timestamp
connection slave;
include/stop_slave.inc
set @@global.debug_dbug="+d,pause_sql_thread_on_next_event";
include/start_slave.inc
connection master;
insert into t1 values(2);
include/save_master_gtid.inc
connection slave;
set debug_sync='now wait_for paused_on_event';
connection master;
# Sleeping 1s to create a visible SBM gap between events
insert into t1 values(3);
include/save_master_gtid.inc
connection slave;
set debug_sync='now wait_for paused_on_event';
include/stop_slave.inc
set debug_sync='RESET';
SET @@global.debug_dbug=$save_dbug;
include/start_slave.inc
include/sync_with_master_gtid.inc
connection master;
DROP TABLE t1;
include/rpl_end.inc