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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 enter the group when it has more executed GTIDs
# than the group in its total, but the group has also some received transactions.
# In total the group has more transactions than the joiner, so it can 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.
# 5) Try add M3 back to the group. Check that M3 has more executed
# transactions than M2. M3 can still join the group because M2 (the group)
# has more transactions when we take into account its received
# transactions. Start the applier on M2. Check M3 is ONLINE.
# 6) Clean up.
################################################################################
--source include/big_test.inc
--source include/have_debug_sync.inc
--let $group_replication_group_name= 3d4bc080-ec58-11e5-a837-0800200c9a66
--source include/have_group_replication_plugin.inc
--let $rpl_server_count= 3
--source include/group_replication.inc
--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.
--echo # 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
--let $assert_text= Server 2 has only 4 applied transactions.
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-4";
--source include/assert.inc
--echo #
--echo # Step 4: Remove server 1
--echo #
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--source include/stop_group_replication.inc
--echo #
--echo # Step 5: Try add server 3 back to the group.
--echo # Server 3 has more executed GTIDs, but server 2 has also retrieved GTIDs.
--echo #
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
--let $assert_text= Server 2 has only 4 applied transactions.
--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 6 applied transactions.
--let $assert_cond= "[SELECT @@GLOBAL.GTID_EXECUTED]" = "$group_replication_group_name:1-6";
--source include/assert.inc
--eval SET GLOBAL group_replication_group_name= "$group_replication_group_name"
--source include/start_group_replication_command.inc
--echo # Resume server 2 applier
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET DEBUG_SYNC = "now WAIT_FOR applier_read_blocked";
SET @@GLOBAL.DEBUG='-d,block_applier_updates';
SET DEBUG_SYNC = "now SIGNAL resume_applier_read";
--let $rpl_connection_name= server3
--source include/rpl_connection.inc
--let $group_replication_member_state= ONLINE
--source include/gr_wait_for_member_state.inc
--echo #
--echo # Step 6: Cleanup
--echo #
--let $rpl_connection_name= server2
--source include/rpl_connection.inc
SET DEBUG_SYNC= 'RESET';
--let $rpl_connection_name= server1
--source include/rpl_connection.inc
--source include/start_group_replication.inc
DROP TABLE t1;
--source include/group_replication_end.inc
|
