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################################################################################
# Validate group_replication_consistency= 'AFTER' behaviour against a unreachable
# member that does not cause majority loss.
#
# Test:
# 00. The test requires three servers: M1, M2 and M3.
# 01. Increase the expel timeout.
# 02. Create a table on the group.
# 03. Make server 3 block before send its prepare message.
# This will allow us to deterministically make it
# UNREACHABLE while others are waiting for its acknowledge.
# 04. Execute T1 on server1.
# 05. Wait until T1 is prepared on server3.
# 06. Make server 3 UNREACHABLE.
# 07. server 1 and 2 are waiting for the acknowledges, they
# will not proceed until server3 acknowledges or leaves
# the group.
# 08. Make server 3 ONLINE.
# 09. Unblock T1 prepare on server3.
# 10. T1 is committed on all servers.
# 11. Clean up.
################################################################################
# Test involves sending SIGSTOP and SIGCONT signals using kill Linux command.
--source include/linux.inc
--source include/have_debug_sync.inc
--source include/big_test.inc
--source include/force_restart.inc
--source include/have_group_replication_plugin.inc
--let $rpl_server_count= 3
--source include/group_replication.inc
--echo
--echo ############################################################
--echo # 01. Increase the expel timeout.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
SET GLOBAL group_replication_member_expel_timeout = 300;
SELECT @@GLOBAL.group_replication_member_expel_timeout;
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET GLOBAL group_replication_member_expel_timeout = 300;
SELECT @@GLOBAL.group_replication_member_expel_timeout;
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
SET GLOBAL group_replication_member_expel_timeout = 300;
SELECT @@GLOBAL.group_replication_member_expel_timeout;
SET SESSION sql_log_bin = 0;
CREATE TABLE pid_table(pid_no INT PRIMARY KEY);
--let $pid_file=`SELECT @@pid_file`
--replace_result $pid_file pid_file
--eval LOAD DATA LOCAL INFILE '$pid_file' INTO TABLE pid_table
--let $server_pid=`SELECT pid_no FROM pid_table`
DROP TABLE pid_table;
SET SESSION sql_log_bin = 1;
--echo
--echo ############################################################
--echo # 02. Create a table on the group.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY);
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--let $member1_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $member2_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $member3_uuid= query_get_value(SELECT @@SERVER_UUID, @@SERVER_UUID, 1)
--echo
--echo ############################################################
--echo # 03. Make server 3 block before send its prepare message.
--echo # This will allow us to deterministically make it
--echo # UNREACHABLE while others are waiting for its acknowledge.
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
SET @@GLOBAL.DEBUG= '+d,group_replication_wait_before_message_send_after_applier_prepare';
--echo
--echo ############################################################
--echo # 04. Execute T1 on server1.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--send INSERT INTO t1 VALUES (1)
--echo
--echo ############################################################
--echo # 05. Wait until T1 is prepared on server3.
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
# Wait for the debug sync to be reached.
SET DEBUG_SYNC= "now WAIT_FOR signal.after_before_message_send_after_applier_prepare_waiting";
--echo
--echo ############################################################
--echo # 06. Make server 3 UNREACHABLE.
--let $rpl_connection_name= server_3
--source include/rpl_connection.inc
# Then we send a SIGSTOP to it. This will stop the server from sending the
# keep-alive message and thus it will be viewed as a faulty node by the rest of
# the group (and consequently expelled).
--exec kill -19 $server_pid
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $group_replication_member_state= UNREACHABLE
--let $group_replication_member_id= $member3_uuid
--source include/gr_wait_for_member_state.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $group_replication_member_state= UNREACHABLE
--let $group_replication_member_id= $member3_uuid
--source include/gr_wait_for_member_state.inc
--echo
--echo ############################################################
--echo # 07. server 1 and 2 are waiting for the acknowledges, they
--echo # will not proceed until server3 acknowledges or leaves
--echo # the group.
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM information_schema.processlist WHERE user='root' AND state='waiting for handler commit' AND info='INSERT INTO t1 VALUES (1)'
--source include/wait_condition.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $wait_condition=SELECT COUNT(*)=1 FROM performance_schema.threads WHERE processlist_state LIKE '%waiting for handler commit%' AND name LIKE 'thread/sql/replica_%'
--source include/wait_condition.inc
--echo
--echo ############################################################
--echo # 08. Make server 3 ONLINE.
# Send SIGCONT to server, so it can continue.
--let $rpl_connection_name= server_3
--source include/rpl_connection.inc
--exec kill -18 $server_pid
--let $rpl_connection_name= server_1
--source include/rpl_connection.inc
--let $group_replication_member_state= ONLINE
--let $group_replication_member_id= $member3_uuid
--source include/gr_wait_for_member_state.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $group_replication_member_state= ONLINE
--let $group_replication_member_id= $member3_uuid
--source include/gr_wait_for_member_state.inc
--echo
--echo ############################################################
--echo # 09. Unblock T1 prepare on server3.
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
# Signal debug sync to continue.
SET DEBUG_SYNC= 'now SIGNAL signal.after_before_message_send_after_applier_prepare_continue';
SET @@GLOBAL.DEBUG= '-d,group_replication_wait_before_message_send_after_applier_prepare';
--echo
--echo ############################################################
--echo # 10. T1 is committed on all servers.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--reap
--let $assert_text= 'There is 1 value in table t1'
--let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE c1=1, count, 1] = 1
--source include/assert.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $assert_text= 'There is 1 value in table t1'
--let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE c1=1, count, 1] = 1
--source include/assert.inc
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $assert_text= 'There is 1 value in table t1'
--let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE c1=1, count, 1] = 1
--source include/assert.inc
--let $diff_tables=server1:t1, server2:t1, server3:t1
--source include/diff_tables.inc
--echo
--echo ############################################################
--echo # 11. Clean up.
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
DROP TABLE t1;
--source include/group_replication_end.inc
|
