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mariadb/mysql-test/suite/bugs/t/rpl_bug38205.test
Sven Sandberg 09c80e12c5 BUG#49978: Replication tests don't clean up replication state at the end
Major replication test framework cleanup. This does the following:
 - Ensure that all tests clean up the replication state when they
   finish, by making check-testcase check the output of SHOW SLAVE STATUS.
   This implies:
    - Slave must not be running after test finished. This is good
      because it removes the risk for sporadic errors in subsequent
      tests when a test forgets to sync correctly.
    - Slave SQL and IO errors must be cleared when test ends. This is
      good because we will notice if a test gets an unexpected error in
      the slave threads near the end.
    - We no longer have to clean up before a test starts.
 - Ensure that all tests that wait for an error in one of the slave
   threads waits for a specific error. It is no longer possible to
   source wait_for_slave_[sql|io]_to_stop.inc when there is an error
   in one of the slave threads. This is good because:
    - If a test expects an error but there is a bug that causes
      another error to happen, or if it stops the slave thread without
      an error, then we will notice.
    - When developing tests, wait_for_*_to_[start|stop].inc will fail
      immediately if there is an error in the relevant slave thread.
      Before this patch, we had to wait for the timeout.
 - Remove duplicated and repeated code for setting up unusual replication
   topologies. Now, there is a single file that is capable of setting
   up arbitrary topologies (include/rpl_init.inc, but
   include/master-slave.inc is still available for the most common
   topology). Tests can now end with include/rpl_end.inc, which will clean
   up correctly no matter what topology is used. The topology can be
   changed with include/rpl_change_topology.inc.
 - Improved debug information when tests fail. This includes:
    - debug info is printed on all servers configured by include/rpl_init.inc
    - User can set $rpl_debug=1, which makes auxiliary replication files
      print relevant debug info.
 - Improved documentation for all auxiliary replication files. Now they
   describe purpose, usage, parameters, and side effects.
 - Many small code cleanups:
    - Made have_innodb.inc output a sensible error message.
    - Moved contents of rpl000017-slave.sh into rpl000017.test
    - Added mysqltest variables that expose the current state of
      disable_warnings/enable_warnings and friends.
    - Too many to list here: see per-file comments for details.
2010-12-19 18:07:28 +01:00

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#
# Bug #38205 Row-based Replication (RBR) causes inconsistencies: HA_ERR_FOUND_DUPP_KEY
# Bug#319 if while a non-transactional slave is replicating a transaction possible problem
#
# Verifying the fact that STOP SLAVE in the middle of a group execution waits
# for the end of the group before the slave sql thread will stop.
# The patch refines STOP SLAVE to not interrupt a transaction or other type of
# the replication events group (the part I).
# Killing the sql thread continues to provide a "hard" stop (the part II).
#
# Non-deterministic tests
#
source include/master-slave.inc;
source include/have_innodb.inc;
#
# Part II, killed sql slave leaves instantly
#
# A. multi-statement transaction as the replication group
connection master;
create table t1i(n int primary key) engine=innodb;
create table t2m(n int primary key) engine=myisam;
sync_slave_with_master;
connection master;
begin;
insert into t1i values (1);
insert into t1i values (2);
insert into t1i values (3);
commit;
sync_slave_with_master;
#
# todo: first challenge is to find out the SQL thread id
# the following is not fully reliable
#
let $id=`SELECT id from information_schema.processlist where user like 'system user' and state like '%Has read all relay log%' or user like 'system user' and state like '%Reading event from the relay log%'`;
connection slave;
begin;
insert into t1i values (5);
connection master;
let $pos0_master= query_get_value(SHOW MASTER STATUS, Position, 1);
begin;
insert into t1i values (4);
insert into t2m values (1); # non-ta update
update t1i set n = 5 where n = 4; # to block at. can't be played with killed
commit;
let $pos1_master= query_get_value(SHOW MASTER STATUS, Position, 1);
connection slave;
# slave sql thread must be locked out by the conn `slave' explicit lock
let $pos0_slave= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
--disable_query_log
eval select $pos0_master - $pos0_slave as zero;
--enable_query_log
connection slave1;
let $count= 1;
let $table= t2m;
source include/wait_until_rows_count.inc;
#
# todo: may fail as said above
#
--echo *** kill sql thread ***
--disable_query_log
eval kill connection $id;
--enable_query_log
connection slave;
rollback; # release the sql thread
connection slave1;
source include/wait_for_slave_sql_to_stop.inc;
let $sql_status= query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1);
--echo *** sql thread is *not* running: $sql_status ***
let $pos1_slave= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
connection slave;
--echo *** the prove: the killed slave has not finished the current transaction ***
--disable_query_log
select count(*) as three from t1i;
eval select $pos1_master > $pos1_slave as one;
eval select $pos1_slave - $pos0_slave as zero;
--enable_query_log
delete from t2m; # remove the row to be able to replay
start slave sql_thread;
#
# Part I: B The homogenous transaction remains interuptable in between
#
connection master;
delete from t1i;
delete from t2m;
sync_slave_with_master;
begin;
insert into t1i values (5);
connection master;
let $pos0_master= query_get_value(SHOW MASTER STATUS, Position, 1);
begin;
insert into t1i values (4);
update t1i set n = 5 where n = 4; # to block at. not to be played
commit;
let $pos1_master= query_get_value(SHOW MASTER STATUS, Position, 1);
connection slave1;
# slave sql can't advance as must be locked by the conn `slave' trans
let $pos0_slave= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
--disable_query_log
eval select $pos0_master - $pos0_slave as zero;
--enable_query_log
#
# the replicated trans is blocked by the slave's local.
# However, it's not easy to catch the exact moment when it happens.
# The test issues sleep which makes the test either non-deterministic or
# wasting too much time.
#
--sleep 3
send stop slave sql_thread;
connection slave;
rollback; # release the sql thread
connection slave1;
reap;
source include/wait_for_slave_sql_to_stop.inc;
let $sql_status= query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1);
--echo *** sql thread is *not* running: $sql_status ***
let $pos1_slave= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
--echo *** the prove: the stopped slave has rolled back the current transaction ***
--disable_query_log
select count(*) as zero from t1i;
eval select $pos0_master - $pos0_slave as zero;
eval select $pos1_master > $pos0_slave as one;
--enable_query_log
start slave sql_thread;
# clean-up
connection master;
drop table t1i, t2m;
--source include/rpl_end.inc