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# In case master's gtid binlog state is divergent from the slave's gtid_slave_pos
# slave may not be able to connect.
# For instance when slave is more updated in some of domains, see
# MDEV-12012 as example, the master's state may require adjustment.
# In a specific case of an "old" divergent domain, that is there
# won't be no more event groups from it generated, the states can be
# made compatible with wiping the problematic domain away. After that slave
# becomes connectable.
#
# Notice that the slave applied gtid state is not really required to
# be similarly cleaned in order for replication to flow.
# However this could lead to an expected error when the master
# resumes binlogging of such domain which the test demonstrate.
--source include/master-slave.inc
--connection master
# enforce the default domain_id binlogging explicitly
SET @@SESSION.gtid_domain_id=0;
CREATE TABLE t (a INT);
--sync_slave_with_master
--connection slave
call mtr.add_suppression("connecting slave requested to start from.*which is not in the master's binlog");
--source include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=slave_pos;
--connection master
# create extra gtid domains for binlog state
--let $extra_domain_id=11
--let $extra_domain_server_id=111
--let $extra_gtid_seq_no=1
--eval SET @@SESSION.gtid_domain_id=$extra_domain_id
--eval SET @@SESSION.server_id=$extra_domain_server_id
--eval SET @@SESSION.gtid_seq_no=$extra_gtid_seq_no
INSERT INTO t SET a=1;
#
# Set up the slave replication state as if slave knows more events from the extra
# domain.
#
--connection slave
SET @save.gtid_slave_pos=@@global.gtid_slave_pos;
--eval SET @@global.gtid_slave_pos=concat(@@global.gtid_slave_pos, ",", $extra_domain_id, "-", $extra_domain_server_id, "-", $extra_gtid_seq_no + 1)
# unsuccessful attempt to start slave
START SLAVE IO_THREAD;
--let $slave_io_errno=1236
--source include/wait_for_slave_io_error.inc
--connection master
# adjust the master binlog state
FLUSH BINARY LOGS;
--let $purge_to_binlog= query_get_value(SHOW MASTER STATUS, File, 1)
--eval PURGE BINARY LOGS TO '$purge_to_binlog';
# with final removal of the extra domain
--eval FLUSH BINARY LOGS DELETE_DOMAIN_ID=($extra_domain_id)
--connection slave
# start the slave sucessfully
--source include/start_slave.inc
--connection master
# but the following gtid from the *extra* domain will break replication
INSERT INTO t SET a=1;
# take note of the slave io thread error due to being dismissed
# extra domain at connection to master which tried becoming active;
# slave is to stop.
--connection slave
--let $errno=1236
--source include/wait_for_slave_io_error.inc
# let's apply the very same medicine
--connection master
FLUSH BINARY LOGS;
--let $purge_to_binlog= query_get_value(SHOW MASTER STATUS, File, 1)
--eval PURGE BINARY LOGS TO '$purge_to_binlog';
# with final removal of the extra domain
--eval FLUSH BINARY LOGS DELETE_DOMAIN_ID=($extra_domain_id)
--connection slave
--source include/start_slave.inc
#
# cleanup
#
--connection master
SET @@SESSION.gtid_domain_id=0;
DROP TABLE t;
sync_slave_with_master;
--source include/rpl_end.inc
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