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################################################################################
# Test that evaluates the safe guards that stop members from joining with
# transactions not present in the group.
#
# Here we test that a joiner can't sometimes enter the group when it has less
# executed transactions than the group in its total. This happens if the merge
# of the joiner executed and received sets is bigger than the group total set of
# GTIDs.
# In total the joiner has more transactions than the group, so it can't join.
#
# Test guide:
# 0) The test requires three servers: M1, M2 and M3.
# 1) With all the 3 members ONLINE, create a table on M1. Check 4 transactions
# belonging to the GROUP on M2 and M3. Block the applier on M2 so it can't
# apply remote transactions.
# 2) Execute more transaction on M1. Check 6 transactions belonging to the
# GROUP on M3 then make M3 leave.
# 3) Execute some more transactions and check M2 has applied none.
# 4) Remove M1 and M2.
# 5) Try bootstrap add M3 back to the group.
# 6) Check that M3 (the group) has less executed GTIDs than M2. M2 can't
# still join the group because M2 has more transactions when we take
# into account its received transactions.
# 7) Clean up.
################################################################################
--source include/big_test.inc
--source include/have_debug_sync.inc
--let $group_replication_group_name= ba8c9f00-ec68-11e5-a837-0800200c9a66
--source include/have_group_replication_plugin.inc
--let $rpl_server_count= 3
--source include/group_replication.inc
# Suppress errors
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET SESSION sql_log_bin= 0;
call mtr.add_suppression(".*This member has more executed transactions *.*");
call mtr.add_suppression(".*The member contains transactions not present *.*");
call mtr.add_suppression("Replica SQL for channel 'group_replication_applier': Relay log read failure: Could not parse relay log event entry.*");
call mtr.add_suppression("The applier thread execution was aborted. Unable to process more transactions, this member will now leave the group.");
call mtr.add_suppression("Fatal error during execution on the Applier process of Group Replication. The server will now leave the group.");
call mtr.add_suppression("The server was automatically set into read only mode after an error was detected.");
call mtr.add_suppression("Skipping leave operation: concurrent attempt to leave the group is on-going.");
SET SESSION sql_log_bin= 1;
--echo #
--echo # Create a table for testing on server 1
--echo #
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
--source include/rpl_sync.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $assert_text= Server 2 has 4 transaction belonging to the group
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-4";
--source include/assert.inc
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $assert_text= Server 3 has 4 transaction belonging to the group
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-4";
--source include/assert.inc
--echo #
--echo # Step 1: Block the applier on server 2.
--echo #
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET @@GLOBAL.DEBUG='+d,block_applier_updates';
--echo #
--echo # Step 2: Insert some transaction and remove server 3
--echo #
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
INSERT INTO t1 VALUES (1);
INSERT INTO t1 VALUES (2);
--let $sync_slave_connection= server3
--source include/sync_slave_sql_with_master.inc
--let $assert_text= Server 3 has 6 transaction belonging to the group
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-6";
--source include/assert.inc
--source include/stop_group_replication.inc
--echo #
--echo # Step 3: Insert more transactions. Assert that server 2 applied none
--echo #
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
INSERT INTO t1 VALUES (3);
INSERT INTO t1 VALUES (4);
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $wait_condition= SELECT received_transaction_set="$group_replication_group_name:1-8" FROM performance_schema.replication_connection_status WHERE channel_name='group_replication_applier';
--source include/wait_condition.inc
--echo #
--echo # Step 4: Stop group replication on server 1 and server 2
--echo #
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
# Stop before committing the received transactions.
SET DEBUG_SYNC = "now WAIT_FOR applier_read_blocked";
SET @@GLOBAL.DEBUG='-d,block_applier_updates';
SET @@GLOBAL.DEBUG='+d,force_sql_thread_error';
SET DEBUG_SYNC = "now SIGNAL resume_applier_read";
--let $group_replication_member_state= ERROR
--source include/gr_wait_for_member_state.inc
SET @@GLOBAL.DEBUG='-d,force_sql_thread_error';
SET DEBUG_SYNC= 'RESET';
--source include/stop_group_replication.inc
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--source include/stop_group_replication.inc
--echo #
--echo # Step 5: Boot the group again with server 3
--echo #
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--source include/start_and_bootstrap_group_replication.inc
--echo #
--echo # Step 6: Try to join server 2 that was less executed GTIDs
--echo # The start should fail as server 2 has more transactions in total
--echo #
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $assert_text= Server 2 has 4 transaction belonging to the group
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-4";
--source include/assert.inc
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $assert_text= Server 3 has 7 transaction belonging to the group
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-7";
--source include/assert.inc
--let $rpl_connection_name= server_2
--source include/rpl_connection.inc
LOCK TABLE t1 READ;
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--eval SET GLOBAL group_replication_group_name= "$group_replication_group_name"
--send
START GROUP_REPLICATION;
--let $rpl_connection_name= server_2
--source include/rpl_connection.inc
UNLOCK TABLES;
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--error ER_GROUP_REPLICATION_CONFIGURATION
--reap
#for safety wait for it to leave
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $group_replication_number_of_members= 1
--source include/gr_wait_for_number_of_members.inc
--echo #
--echo # Step 7: Clean up
--echo #
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--source include/stop_group_replication.inc
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--source include/start_and_bootstrap_group_replication.inc
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--source include/start_group_replication.inc
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--source include/start_group_replication.inc
DROP TABLE t1;
--source include/group_replication_end.inc
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