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#
# This test ensures that a primary will listen for ACKs by newly added
# semi-sync connections connections, after a pre-existing connection is already
# established. MDEV-32960 reported that the newly added slave's ACK can be
# ignored if listen_on_sockets() does not timeout before
# rpl_semi_sync_master_timeout, and if the existing semi-sync connections fail
# to send ACKs, semi-sync is switched off.
#
# This test ensures this in a two-replica setup with a semi-sync timeout of
# 500ms, and delaying the ACK reply of the first-established replica by 800ms
# to force a timeout, and allowing the second replica to immediately ACK.
#
# References:
# MDEV-32960: Semi-sync ACKed Transaction can Timeout and Switch Off
# Semi-sync with Multiple Replicas
#
--source include/have_debug.inc
# binlog_format independent
--source include/have_binlog_format_statement.inc
--let $rpl_topology= 1->2,1->3
--source include/rpl_init.inc
--connection server_1
set @old_enabled= @@global.rpl_semi_sync_master_enabled;
set @old_timeout= @@global.rpl_semi_sync_master_timeout;
set global rpl_semi_sync_master_enabled= 1;
set global rpl_semi_sync_master_timeout= 500;
--connection server_2
--source include/stop_slave.inc
set @old_enabled= @@global.rpl_semi_sync_slave_enabled;
set @old_dbug= @@global.debug_dbug;
set global rpl_semi_sync_slave_enabled= 1;
set global debug_dbug="+d,simulate_delay_semisync_slave_reply";
--source include/start_slave.inc
--connection server_3
--source include/stop_slave.inc
set @old_enabled= @@global.rpl_semi_sync_slave_enabled;
set global rpl_semi_sync_slave_enabled= 1;
--source include/start_slave.inc
--echo # Ensure primary recognizes both replicas are semi-sync
--connection server_1
--let $status_var_value= 2
--let $status_var= rpl_semi_sync_master_clients
--source include/wait_for_status_var.inc
--let $master_ss_status= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_master_status', Value, 1)
if (`SELECT strcmp("$master_ss_status", "ON") != 0`)
{
SHOW STATUS LIKE 'rpl_semi_sync_master_status';
--die rpl_semi_sync_master_status should be ON to start
}
--connection server_1
--let $init_master_yes_tx= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_master_yes_tx', Value, 1)
create table t1 (a int);
--connection server_2
--echo # Verifying server_2 did not send ACK
--let $slave1_sent_ack= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_slave_send_ack', Value, 1)
if (`SELECT $slave1_sent_ack`)
{
SHOW STATUS LIKE 'rpl_semi_sync_slave_send_ack';
--die server_2 should not have sent semi-sync ACK to primary
}
--connection server_3
--echo # Verifying server_3 did send ACK
--let $slave2_sent_ack= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_slave_send_ack', Value, 1)
if (`SELECT NOT $slave2_sent_ack`)
{
SHOW STATUS LIKE 'rpl_semi_sync_slave_send_ack';
--die server_3 should have sent semi-sync ACK to primary
}
--connection server_1
--echo # Verifying master's semi-sync status is still ON (This failed pre-MDEV-32960 fixes)
let $master_ss_status= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_master_status', Value, 1);
if (`SELECT strcmp("$master_ss_status", "ON") != 0`)
{
SHOW STATUS LIKE 'rpl_semi_sync_master_status';
--die rpl_semi_sync_master_status should not have switched off after server_3 ACKed transaction
}
--echo # Verifying rpl_semi_sync_master_yes_tx incremented
--let $cur_master_yes_tx= query_get_value(SHOW STATUS LIKE 'rpl_semi_sync_master_yes_tx', Value, 1)
if (`SELECT $cur_master_yes_tx != ($init_master_yes_tx + 1)`)
{
--echo # Initial yes_tx: $init_master_yes_tx
--echo # Current yes_tx: $cur_master_yes_tx
--die rpl_semi_sync_master_yes_tx should have been incremented by primary
}
--echo #
--echo # Cleanup
--connection server_2
set global rpl_semi_sync_slave_enabled= @old_enabled;
set global debug_dbug= @old_dbug;
--source include/stop_slave.inc
--connection server_3
set global rpl_semi_sync_slave_enabled= @old_enabled;
--source include/stop_slave.inc
--connection server_1
set global rpl_semi_sync_master_enabled= @old_enabled;
set global rpl_semi_sync_master_timeout= @old_timeout;
drop table t1;
--connection server_2
--source include/start_slave.inc
--connection server_3
--source include/start_slave.inc
--source include/rpl_end.inc
--echo # End of rpl_semi_sync_no_missed_ack_after_add_slave.test
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