Current File : //usr/share/mysql-test/extra/rpl_tests/rpl_mts_pending_events.inc
###############################################################################
# This .inc is used to check coordinator behaviour of scheduling an event
# when the new event cannot be placed into worker's queue due to size limit
# (SLAVE_PENDING_JOBS_SIZE_MAX)
#
# Usage:
# --let $table_to_lock=db1.t
# --let $query_that_waits_on_table_lock=INSERT INTO db1.t VALUES ('small event')
# --let $query_that_needs_to_be_processed_by_coordinator=INSERT INTO db2.t VALUES (REPEAT('big event', $mts_pending_max))
# --let $tables_involved_in_test=db1.t, db2.t
# --source ../mysql-test/extra/rpl_tests/rpl_mts_pending_events.inc
#
# Parameters:
#
# $table_to_lock:
# Provide full table name that needs to be locked using LOCK TABLE.
# Eg: --let $table_to_lock=db1.t
#
# $query_that_waits_on_table_lock:
# A query that cannot be executed due the lock acquired by LOCK TABLE.
# Eg: --let $table_to_lock=db1.t
# --let $query_that_waits_on_table_lock=INSERT INTO db1.t VALUES ('small event')
#
# $query_that_needs_to_be_processed_by_coordinator:
# A query that will be processed by coordinator only after
# $query_that_waits_on_table_lock is completely executed due to size limit
# (SLAVE_PENDING_JOBS_SIZE_MAX)
# --let $query_that_needs_to_be_processed_by_coordinator=INSERT INTO db2.t VALUES (REPEAT('big event', $mts_pending_max))
#
# $tables_involved_in_test:
# Tables that are involved in the test. This list will be used to do diff
# between master and slave's tables to test that replication worked fine.
# Eg: --let $tables_involved_in_test=db1.t, db2.t
#
###############################################################################
if (!$table_to_lock)
{
--die ERROR IN TEST: you must set $table_to_lock before sourcing rpl_mts_pending_events.inc.
}
if (!$query_that_waits_on_table_lock)
{
--die ERROR IN TEST: you must set $query_that_waits_on_table_lock before sourcing rpl_mts_pending_events.inc.
}
if (!$query_that_needs_to_be_processed_by_coordinator)
{
--die ERROR IN TEST: you must set $query_that_needs_to_be_processed_by_coordinator before sourcing rpl_mts_pending_events.inc.
}
if (!$tables_involved_in_test)
{
--die ERROR IN TEST: you must set $tables_involved_in_test before sourcing rpl_mts_pending_events.inc.
}
--echo #
--echo # 1) On Slave, lock one table so that any operation on that
--echo # will be waiting for the lock to be released.
--echo #
--source include/rpl_connection_slave1.inc
--eval LOCK TABLE $table_to_lock WRITE
--echo #
--echo # 2) Execute query that is going to wait for the table lock.
--echo #
--source include/rpl_connection_master.inc
--eval $query_that_waits_on_table_lock
--echo #
--echo # 3) Wait on Slave till a worker picks this event and wait for the
--echo # lock (which is acquired in step 1)
--echo #
--source include/rpl_connection_slave.inc
--let $wait_condition= SELECT COUNT(*) = 1 FROM information_schema.processlist WHERE state = "Waiting for table metadata lock"
--source include/wait_condition.inc
--echo #
--echo # 4) Now on Master, insert another query that reaches slave.
--echo #
--source include/rpl_connection_master.inc
--eval $query_that_needs_to_be_processed_by_coordinator
--echo #
--echo # 5) Check that Coordinator waits for the query (at step 2) to be
--echo # executed before dedicating this new query (at step 4) to
--echo # one of the workers because of the event size limits.
--echo #
--source include/rpl_connection_slave.inc
--let $assert_text= Check that one of the applier worker thread is waiting for the table metadata lock.
--let $assert_cond= [SELECT count(*) FROM information_schema.processlist WHERE state = "Waiting for table metadata lock"] = 1
--source include/assert.inc
--let $wait_condition= SELECT count(*) = 1 FROM information_schema.processlist WHERE state = "Waiting for Slave Workers to free pending events"
--source include/wait_condition.inc
--echo #
--echo # 6) Release the lock acquired in step 1, so that first query will
--echo # continue it's work and once it is done, second big event
--echo # will also continue it's work.
--echo #
--source include/rpl_connection_slave1.inc
UNLOCK TABLES;
--echo #
--echo # 7) check that slave is able to catch up with master after releasing the
--echo # lock in step 6.
--echo #
--echo # 7.1) Sync SQL thread with Master.
--echo #
--source include/rpl_connection_master.inc
--source include/sync_slave_sql_with_master.inc
--echo #
--echo # 7.2) Diff all the tables involved in the test to prove
--echo # that replication worked fine.
--echo #
--let $number_of_tables_involved_in_test=`SELECT LENGTH('$tables_involved_in_test') - LENGTH(REPLACE('$tables_involved_in_test',',','')) + 1`
--let $t=1
while ($t <= $number_of_tables_involved_in_test)
{
--let $table= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('$tables_involved_in_test', ',', $t), ',', -1 )`
--let $diff_tables= master:$table,slave:$table
--source include/diff_tables.inc
--inc $t
}
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