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################################################################################
# Group replication test that asserts that servers do not repeat View change
# events in their binlogs.
# This happened in:
# Recovery rounds where the events were received a second time but not skipped
# Plugin restarts where the applier relay log would be replayed.
#
# To test this, in a group several view changes are executed, and along side
# them we check in one of the servers that only the expected view events are
# written.
#
# Test:
# 0. The test requires three servers: M1, M2 and M3.
# 1. Bootstrap group with M1. Create table t1 on M1. Start GR on M2. Check that
# M2 recieves view change from M1, create table, view change by M2.
# 2. Make M2 leave and join again. Check that exists one more event after join
# in the binlog.
# 3. Stop GR on M2. Join and leave M3. Start GR on M2. Check on M2 it should
# receive 1 view change transaction from M3 and write 1 other.
# 4. Clean up.
################################################################################
--source include/big_test.inc
--source include/have_group_replication_plugin.inc
--let $rpl_skip_group_replication_start= 1
--let $rpl_server_count= 3
--source include/group_replication.inc
# The sequence of events that make up a View Change
--let $vcle_seq= Gtid # Query/BEGIN # View_change # Query/COMMIT
--echo #
--echo # Setup a new group with two servers.
--echo # Check that server 2 receives a view event and writes another one
--echo #
--connection server1
--echo server1
--source include/start_and_bootstrap_group_replication.inc
CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
--connection server2
--echo server2
--source include/start_group_replication.inc
# View change (received from s1) # Create table # View change (written by s2)
--let $event_sequence= $vcle_seq # !Gtid_transaction # $vcle_seq
--source include/assert_binlog_events.inc
--echo #
--echo # Make server 2 leave and enter generating one more view change event
--echo # Check that only one view change transaction is written to the binlog
--echo #
--connection server2
--echo server2
--source include/stop_group_replication.inc
# No event should be written in the binlog
--let $event_sequence= $event_sequence
--source include/assert_binlog_events.inc
--source include/start_group_replication.inc
# One more event after joining:
# Previous events # View change (s2 joined)
--let $event_sequence= $event_sequence # $vcle_seq
--source include/assert_binlog_events.inc
--echo #
--echo # Make server 3 join and leave while server 2 was away
--echo # Server 2 should receive 1 view change transaction from recovery and
--echo # write another
--echo #
--connection server2
--echo server2
--source include/stop_group_replication.inc
--connection server3
--echo server3
--source include/start_group_replication.inc
--source include/stop_group_replication.inc
--connection server2
--echo server2
--source include/start_group_replication.inc
# Previous events # View change (3 joined) # View change (2 joined)
--let $event_sequence= $event_sequence # $vcle_seq # $vcle_seq
--source include/assert_binlog_events.inc
--echo #
--echo # Cleaning up
--echo #
--connection server3
--echo server3
--source include/start_group_replication.inc
DROP TABLE t1;
--source include/group_replication_end.inc
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