################################################################################
# === Purpose ===
#
# This test verifies that parallel execution of STOP GROUP REPLICATION and
# performance_schema queries are handled properly by the server.
#
# === Implementation ===
#
# 1. The test requires two servers: M1, M2
# 2. Start 2 servers and add them to group replication group
# 3. Send STOP GR command on M1 an halt the execution at a sync point using
#    debug_sync utility.
# 4. Send performance_schema query on M1 from a parallel client.
# 5. Verify that concurrent queries are properly handled by server.
# 6. Verify the consistency of the P_S queries post STOP GR.
# 6. Cleanup
################################################################################

--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/have_group_replication_plugin.inc
--source include/group_replication.inc

--echo #
--echo # Set the necessary debug points required for the simulation.
--echo #
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
SET @debug_save= @@GLOBAL.DEBUG;
SET @@GLOBAL.DEBUG='+d,group_replication_hold_stop_before_leave_the_group';

--echo #
--echo # Send STOP GR command. The query shall wait before
--echo # "leave_group_and_terminate_plugin_modules()" function until it is signaled.
--echo #
--send STOP GROUP_REPLICATION

--echo #
--echo # Wait for STOP GR to reach the debug sync point.
--echo #
--let $rpl_connection_name= server_1_1
--source include/rpl_connection.inc
SET DEBUG_SYNC= "now WAIT_FOR signal.stopping_before_leave_the_group";

--echo #
--echo # Send PS query from different session. The query shall halt in
--echo # "get_group_member_stats()" function.
--echo #
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
SET @@GLOBAL.DEBUG= '+d,group_replication_get_group_member_stats';
--send SELECT * FROM performance_schema.replication_group_member_stats

--echo #
--echo # Block the PS query and allow STOP GR command to continue by
--echo # signalling it.
--echo #
--let $rpl_connection_name= server_1_1
--source include/rpl_connection.inc
SET DEBUG_SYNC= "now WAIT_FOR signal.reached_get_group_member_stats";
SET DEBUG_SYNC= "now SIGNAL signal.resume_stop_before_leave_the_group";

# Reap the STOP GR query.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--reap

--echo #
--echo # Allow the PS query to continue.
--echo #
SET DEBUG_SYNC= "now SIGNAL signal.resume_get_group_member_stats";

# Reap the PS query.
--disable_result_log
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--reap
--enable_result_log

--echo #
--echo # Verify that MEMBER_STATE is OFFLINE on server_1.
--echo #
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $assert_text= Verified that MEMBER_STATE is OFFLINE on server_1
--let $assert_cond= "[SELECT MEMBER_STATE FROM performance_schema.replication_group_members, MEMBER_STATE, 1]" = "OFFLINE"
--source include/assert.inc

--echo #
--echo # Verify that MEMBER_STATE is ONLINE on server_2.
--echo #
--let $rpl_connection_name= server_2
--source include/rpl_connection.inc
--let $assert_text= Verified that MEMBER_STATE is ONLINE on server_2
--let $assert_cond= "[SELECT MEMBER_STATE FROM performance_schema.replication_group_members, MEMBER_STATE, 1]" = "ONLINE"
--source include/assert.inc

# Cleanup
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
SET GLOBAL DEBUG= @debug_save;
SET DEBUG_SYNC= 'RESET';
--source include/group_replication_end.inc