mariadb/mysql-test/t/rpl_deadlock.test

# See if slave restarts the transaction after failing on an InnoDB deadlock error.

# Note: testing what happens when too many retries is possible, but
# needs large waits when running with --debug, so we don't do it.
# The same way, this test may not test what is expected when run
# under Valgrind, timings are too short then (with --valgrind I
# (Guilhem) have seen the test manage to provoke lock wait timeout
# error but not deadlock error; that is ok as code deals with the two
# errors in exactly the same way.
# We don't 'show status like 'slave_retried_transactions'' because this
# is not repeatable (depends on sleeps).

source include/have_innodb.inc;
source include/master-slave.inc;

connection master;
create table t1 (a int not null, key(a)) engine=innodb;
create table t2 (a int not null, key(a)) engine=innodb;
create table t3 (a int) engine=innodb;
create table t4 (a int) engine=innodb;
show variables like 'slave_transaction_retries';
sync_slave_with_master;

show create table t1;
show create table t2;
show variables like 'slave_transaction_retries';
stop slave;

# 1) Test deadlock

connection master;
begin;
# Let's keep BEGIN and the locked statement in two different relay logs.
let $1=200;
disable_query_log;
while ($1)
{
 eval insert into t3 values( $1 );
 dec $1;
}
enable_query_log;
insert into t3 select * from t2 for update;
insert into t1 values(1);
commit;
save_master_pos;

connection slave;
begin;
# Let's make our transaction large so that it's slave who is chosen as
# victim
let $1=1000;
disable_query_log;
while ($1)
{
 eval insert into t4 values( $1 );
 dec $1;
}
enable_query_log;
select * from t1 for update;
start slave;
--sleep 3; # hope that slave is blocked now
insert into t2 values(22); # provoke deadlock, slave should be victim
commit;
sync_with_master;
select * from t1; # check that slave succeeded finally
select * from t2;
# check that no error is reported
--replace_column 1 # 8 # 9 # 23 # 33 #
--replace_result $MASTER_MYPORT MASTER_MYPORT
show slave status;

# 2) Test lock wait timeout

stop slave;
change master to master_log_pos=401; # the BEGIN log event
begin;
select * from t2 for update; # hold lock
start slave;
--sleep 10; # slave should have blocked, and be retrying
commit;
sync_with_master;
select * from t1; # check that slave succeeded finally
select * from t2;
# check that no error is reported
--replace_column 1 # 8 # 9 # 23 # 33 #
--replace_result $MASTER_MYPORT MASTER_MYPORT
show slave status;

# Now we repeat 2), but with BEGIN in the same relay log as
# COMMIT (to see if seeking into hot log is ok).

set global max_relay_log_size=0;

# This is really copy-paste of 2) of above
stop slave;
change master to master_log_pos=401;
begin;
select * from t2 for update;
start slave;
--sleep 10;
commit;
sync_with_master;
select * from t1;
select * from t2;
--replace_column 1 # 8 # 9 # 23 # 33 #
--replace_result $MASTER_MYPORT MASTER_MYPORT
show slave status;

connection master;
drop table t1,t2;
sync_slave_with_master;