MINI MINI MANI MO

--source include/not_group_replication_plugin.inc
--source include/only_mts_slave_parallel_type_logical_clock.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/have_binlog_format_row.inc
--source include/master-slave.inc

################################################################################
# BUG#19641963 RPL.RPL_SEMI_SYNC_GROUP_COMMIT_DEADLOCK FAILS WITH ASSERT IN
#              MTS CODE
#
# The assertion failure happened in below case:
# Coord                        Worker1                   Worker2
# =====                        ========                  ========
#                              applying ts 3             applying ts 4
# min_waited_timestamp=3
# waiting for the signal
# from a worker
#                              mark ts 3 finished        mark ts 4 finished
#
#                              slave_worker_ends_group   slave_worker_ends_group
#                              store                     store
#                              min_waited_timestamp(3)   min_waited_timestamp(3)
#                              into a local variable     into a local variable
#
#                                                        find the local variable
#                                                        is not SEQ_UNINIT, so
#                                                        update lwm to 4
#                                                        (get_lwm_timestamp)
#                                                        signal coordinator lwm
#                                                        is changed
#
# get the signal from Worker2
# set min_waited_timestamp=0
# dispatch ts 5
#                                                        applying ts 5
#
# dispatch ts 7(have a gap,
# ts 6 is not in the binlog)
# waiting for all workers
# to finish
#
# mts_checkpoint_routine
# remove ts 3,4 from GAQ
# lwm = 5. GAQ head is ts 7
#                              find the local variable
#                              is not SEQ_UNINIT, so it
#                              calls get_lwm_timestamp to
#                              update lwm and
#                              assertion failure happens
#                              in get_lwm_timestamp()
#                              assert lwm(5)+1 == GAQ head ts(7)
#
# The test verifys that the assertion failure doesn't happen.
################################################################################
--source include/rpl_connection_slave.inc
SET @saved_innodb_lock_wait_timeout = @@GLOBAL.innodb_lock_wait_timeout;
SET GLOBAL innodb_lock_wait_timeout = 1000;
--source include/restart_slave_sql.inc

--source include/rpl_connection_master.inc
CREATE TABLE t1(c1 INT PRIMARY KEY);
CREATE TABLE t2(c1 INT PRIMARY KEY);

--source include/sync_slave_sql_with_master.inc
#
# Below two transactions will pause two workers and make coordinator
# in the status that it is waiting for a timestamp to be applied.
#
# Blocking the worker applying the same statement
BEGIN;
INSERT INTO t1 VALUES(1);

# Blocking the worker applying the same statement
--source include/rpl_connection_slave1.inc
BEGIN;
INSERT INTO t2 VALUES(1);

--source include/rpl_connection_master.inc

# Two transactions have same commit parent, so they can be applied parallel
SET debug = '+d,set_commit_parent_100';
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1);
SET debug = '-d,set_commit_parent_100';

# Its commit parent is the sequence_number of INSERT INTO t2 VALUES(1);
# So coordinator has to wait for the INSERT to be applied.
INSERT INTO t1 VALUES(2);

# Increments timestamp twice to generate a timestamp gap.
SET debug = '+d,logical_clock_step_2';
INSERT INTO t1 VALUES(3);
SET debug = '-d,logical_clock_step_2';

--source include/save_master_pos.inc

# Make sure coordinator is waiting for a commit parent and
# guaratee min_waited_timestamp is set to a valid timestamp
--source include/rpl_connection_slave.inc
--let $wait_condition = SELECT count(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state = 'Waiting for dependent transaction to commit'
--source include/wait_condition.inc

# It will pause the worker after it read min_waited_timestamp
SET GLOBAL debug = '+d,slave_worker_ends_group_before_signal_lwm';
ROLLBACK;

# Make sure the worker read min_waited_timestamp
--let $wait_condition = SELECT count(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state = 'debug sync point: now'
--source include/wait_condition.inc

# clear the debug point so other workers are not paused
SET GLOBAL debug = '-d,slave_worker_ends_group_before_signal_lwm';

# It will pause coordinator after it finds that all workers finished.
SET GLOBAL debug = '+d,wait_for_workers_to_finish_after_wait';

--source include/rpl_connection_slave1.inc
# Resume the worker applying INSERT INTO t2 VALUES(1)
ROLLBACK;
#--let $wait_condition = SELECT count(*) = 3 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state = 'Waiting for an event from Coordinator'
#--source include/wait_condition.inc

# Make sure coordinator is handling the gap and
--let $wait_condition = SELECT count(*) = 2 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state = 'debug sync point: now'
--source include/wait_condition.inc

SET debug_sync='now SIGNAL worker_continue';

# Make sure the worker applying INSERT INTO t1 VALUES(1) finished
--let $wait_condition = SELECT count(*) = 4 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state = 'Waiting for an event from Coordinator'
--source include/wait_condition.inc

#
# Cleanup
#
SET debug_sync='now SIGNAL coordinator_continue';
--source include/sync_slave_sql.inc
SET GLOBAL debug = '-d,wait_for_workers_to_finish_after_wait';

--source include/rpl_connection_slave.inc
SET GLOBAL innodb_lock_wait_timeout = @saved_innodb_lock_wait_timeout;

--source include/rpl_connection_master.inc
DROP TABLE t1, t2;
--source include/rpl_end.inc