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| Current File : //usr/opt/mysql57/mysql-test/suite/group_replication/t/gr_primary_key_conflict.test |
################################################################################
# Test case to verify that concurrent transactions with intersecting
# write set, the same primary key, do conflict.
#
# Scenario 8.2: WL#6834
#
# T1: WS={t1.a= 1}
#
# T2: WS={t1.a= 1}
#
# Outcome: T1 must abort, T2 must commit.
#
# Full details on WL#6834 QA notes.
#
# Test:
# 0. The test requires two servers: M1 and M2.
# 1. With both members ONLINE. Create a table on M1.
# 2. Set a debug sync before broadcast message to group on M1. Commit a
# transaction that will be blocked before broadcast.
# 3. Wait until M1 reaches the debug sync point.
# 4. Execute a transaction on M2, that will reach first certification, since M1
# is blocked before broadcast.
# 5. Signal the waiting thread on M1 to resume.
# 6. It will end up in an error stating that it was aborted, since transactions
# are conflicting and M2 was ordered first.
# 7. Assert that number of certified transactions are the expected ones.
#
# Checking the positive case in which there is no conflict:
# 8. Set a debug sync before broadcast message to group on M1. Commit a
# transaction that will be block before broadcast.
# 9. Wait until M1 reaches the debug sync point.
# 10. Execute a transaction on M2, that will reach first certification, since M1
# is blocked before broadcast.
# 11. Signal the waiting thread on M1 to resume.
# 12. It will execute without error as the conflicting transactions have been
# removed.
# 13. Assert that number of certified transactions are the expected ones.
# 14. Clean up.
################################################################################
--source include/have_debug_sync.inc
--source ../inc/have_group_replication_plugin.inc
--source ../inc/group_replication.inc
--echo
--echo ############################################################
--echo # 1. Create a table on server1.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
CREATE TABLE t1 (c1 INT PRIMARY KEY);
--source include/rpl_sync.inc
--echo
--echo ############################################################
--echo # 2. Set a debug sync before broadcast message to group on
--echo # connection server_1.
--echo # Commit a transaction that will be block before broadcast.
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
SET @debug_save= @@GLOBAL.DEBUG;
SET @@GLOBAL.DEBUG='d,group_replication_before_message_broadcast';
BEGIN;
INSERT INTO t1 VALUES (1);
--send COMMIT
--echo
--echo ############################################################
--echo # 3. Wait until server_1 connection reaches the
--echo # group_replication_before_message_broadcast debug sync point.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE State = 'debug sync point: now'
--source include/wait_condition.inc
--echo
--echo ############################################################
--echo # 4. Execute a transaction on server2, that will reach first
--echo # certification, since server_1 is blocked before broadcast.
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
INSERT INTO t1 VALUES (1);
--echo
--echo ############################################################
--echo # 5. Signal the waiting thread on server_1 to resume.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
SET DEBUG_SYNC='now SIGNAL waiting';
SET @@GLOBAL.DEBUG= @debug_save;
--echo
--echo ############################################################
--echo # 6. It will end up in an error stating that it was aborted,
--echo # since transactions are conflicting and server2 was
--echo # ordered first.
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $sync_slave_connection= server1
--source include/sync_slave_sql_with_master.inc
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--error ER_TRANSACTION_ROLLBACK_DURING_COMMIT
--reap
--echo
--echo ############################################################
--echo # 7. Assert that number of certified transactions are the
--echo # expected ones.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $certified_transactions= query_get_value(SELECT Count_Transactions_Checked from performance_schema.replication_group_member_stats, Count_Transactions_Checked, 1)
--let $assert_text= The value of Count_Transactions_Checked should be 3 after starting group replication
--let $assert_cond= "$certified_transactions" = 3
--source include/assert.inc
--let $negatively_certified= query_get_value(SELECT Count_Conflicts_Detected from performance_schema.replication_group_member_stats, Count_Conflicts_Detected, 1)
--let $assert_text= The value of Count_Conflicts_Detected should be 1 after starting group replication
--let $assert_cond= "$negatively_certified" = 1
--source include/assert.inc
--echo
--echo ############################################################
--echo # Checking the positive case in which there is no conflict.
--echo ############################################################
--echo
--echo ############################################################
--echo # 1. Set a debug sync before broadcast message to group on
--echo # connection server_1.
--echo # Commit a transaction that will be block before broadcast.
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
SET @@GLOBAL.DEBUG='d,group_replication_before_message_broadcast';
BEGIN;
INSERT INTO t1 VALUES (2);
--send COMMIT
--echo
--echo ############################################################
--echo # 2. Wait until server_1 connection reaches the
--echo # group_replication_before_message_broadcast debug sync point.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE State = 'debug sync point: now'
--source include/wait_condition.inc
--echo
--echo ############################################################
--echo # 3. Execute a transaction on server2, that will reach first
--echo # certification, since server_1 is blocked before broadcast.
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
INSERT INTO t1 VALUES (3);
--let $sync_slave_connection= server1
--source include/sync_slave_sql_with_master.inc
--echo
--echo ############################################################
--echo # 4. Signal the waiting thread on server_1 to resume.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
SET DEBUG_SYNC='now SIGNAL waiting';
SET @@GLOBAL.DEBUG= @debug_save;
--echo
--echo ########################################################################
--echo # 5. It will execute without error as the conflicting transactions have
--echo # been removed.
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--reap
--source include/rpl_sync.inc
--echo
--echo ############################################################
--echo # 6. Assert that number of certified transactions are the
--echo # expected ones.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $assert_text= Table t1 will contain row after the above execution
--let $assert_cond= "[SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 1, count, 1]" = "1"
--source include/assert.inc
--let $assert_text= Table t1 will contain row after the above execution
--let $assert_cond= "[SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 2, count, 1]" = "1"
--source include/assert.inc
--let $assert_text= Table t1 will contain row after the above execution
--let $assert_cond= "[SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 3, count, 1]" = "1"
--source include/assert.inc
--let $assert_text= Table t1 will contain 3 rows after the above execution
--let $assert_cond= "[SELECT COUNT(*) FROM t1]" = "3"
--source include/assert.inc
--let $certified_transactions= query_get_value(SELECT Count_Transactions_Checked from performance_schema.replication_group_member_stats, Count_Transactions_Checked, 1)
--let $assert_text= The value of Count_Transactions_Checked should be 5 after starting group replication
--let $assert_cond= "$certified_transactions" = 5
--source include/assert.inc
--let $negatively_certified= query_get_value(SELECT Count_Conflicts_Detected from performance_schema.replication_group_member_stats, Count_Conflicts_Detected, 1)
--let $assert_text= The value of Count_Conflicts_Detected should be 1 after starting group replication
--let $assert_cond= "$negatively_certified" = 1
--source include/assert.inc
--echo
--echo ############################################################
--echo # Clean up.
DROP TABLE t1;
--source ../inc/group_replication_end.inc