mariadb/mysql-test/suite/multi_source/connects_tried.test

# MDEV-35304: Test the `Connects_Tried` feature
#
# Two connections with different retry frequencies tests their
# separate counters in parallel multi-source (SHOW SLAVE [name] STATUS).
#
# Note: nearly all SELECT results are timing-sensitive,
# therefore, they only list unexpected rows.

--source include/have_binlog_format_mixed.inc # The test is agnostic of binlog formats.
# `rpl_*.inc` (still) expects `server_1` be `master` and `server_2` be `slave`.
--let $rpl_server_count= 3
--let $rpl_skip_start_slave= 1
--source include/master-slave.inc
--let $rpl_server_number= 1
--source include/rpl_stop_server.inc
--let $rpl_server_number= 3
--source include/rpl_stop_server.inc

--connection slave
CHANGE MASTER TO master_connect_retry=2;
--replace_result $SERVER_MYPORT_3 SERVER_MYPORT_3
--eval CHANGE MASTER 'named' TO master_host='127.0.0.1', master_port=$SERVER_MYPORT_3, master_user='root', master_ssl_verify_server_cert=0, master_connect_retry=1
--echo # `Connects_Tried` is 0 before connections begin.
SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;

--disable_warnings
SET @time_begin= CURRENT_TIMESTAMP(1);
START ALL SLAVES; # will fail because the masters are down
--enable_warnings
# CR_CONN_HOST_ERROR
--let $slave_io_errno= 2003
--let $slave_io_error_is_nonfatal= 1
SET @@SESSION.default_master_connection= 'named';
--source include/wait_for_slave_io_error.inc
--let $slave_io_error_is_nonfatal= 1
SET @@SESSION.default_master_connection= '';
--source include/wait_for_slave_io_error.inc

CREATE TEMPORARY TABLE status_begin AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
--echo # `Connects_Tried` is 1 immediately after connection begins.
# (Though it might have ticked additional reconnects by now if stress-testing.)
SELECT Connection_name, Connects_Tried
  FROM status_begin
  WHERE Connects_Tried <= 0;

--echo # `Connects_Tried` takes (at least) 2s to increment for connection '' and 1s for 'named'.
--let $slave_param= Connects_Tried
--let $slave_param_comparison= >

SET @@SESSION.default_master_connection= 'named';
--let $slave_param_value= `SELECT Connects_Tried FROM status_begin WHERE Connection_name = ''`
--source include/wait_for_slave_param.inc
SELECT @time_begin, CURRENT_TIMESTAMP(1)
  WHERE TIMESTAMPDIFF(SECOND, @time_begin, CURRENT_TIMESTAMP(1)) < 1;
--replace_result $_show_slave_status_value Connects_Tried
--eval CREATE TEMPORARY TABLE status_sleep AS SELECT 'named' Connection_name, $_show_slave_status_value Connects_Tried

SET @@SESSION.default_master_connection= '';
--let $slave_param_value= `SELECT Connects_Tried FROM status_begin WHERE Connection_name <> ''`
--source include/wait_for_slave_param.inc
SELECT @time_begin, CURRENT_TIMESTAMP(1)
  WHERE TIMESTAMPDIFF(SECOND, @time_begin, CURRENT_TIMESTAMP(1)) < 2;
--replace_result $_show_slave_status_value Connects_Tried
--eval INSERT INTO status_sleep SET Connection_name= '', Connects_Tried= $_show_slave_status_value

--echo # Boot replication up and compare the final counts
# (In an ideal environment, the 'named' connection that reconnects
#  more frequently would have a `Connects_Tried` ahead of the '' one.
#  In stress-testing, it instead depends on the thread timing and scheduling.)
--let $rpl_server_number= 1
--source include/rpl_start_server.inc
--let $rpl_server_number= 3
--source include/rpl_start_server.inc
--connection slave
# `wait_for_slave_io_to_start.inc` fails if the IO thread has an error.
--let $slave_param= Slave_IO_Running
--let $slave_param_value= Yes
--let $slave_param_comparison= =
SET @@SESSION.default_master_connection= 'named';
--source include/wait_for_slave_param.inc
SET @@SESSION.default_master_connection= '';
--source include/wait_for_slave_param.inc

CREATE TEMPORARY TABLE status_end AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
--echo # `Connects_Tried` increments (at least) 1 for each connection.
SELECT *
  FROM status_sleep JOIN status_end USING(Connection_name)
  WHERE status_end.Connects_Tried <= status_sleep.Connects_Tried;

DO SLEEP(2);
--echo # `Connects_Tried` does not increment after connection establishes.
CREATE TEMPORARY TABLE status_after AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
SELECT *
  FROM status_end JOIN status_after USING(Connection_name)
  WHERE status_after.Connects_Tried <> status_end.Connects_Tried;

--echo # Conventional views
--let $connects_tried= query_get_value("SHOW SLAVE STATUS", Connects_Tried, 1)
--let $connects_tried_named= query_get_value("SHOW SLAVE 'named' STATUS", Connects_Tried, 1)
--replace_result $connects_tried connects_tried $connects_tried_named connects_tried
SELECT * FROM status_end;
--let $connects_tried= query_get_value("SHOW ALL SLAVES STATUS", Connects_Tried, 1)
--let $connects_tried_named= query_get_value("SHOW ALL SLAVES STATUS", Connects_Tried, 2)
--replace_result $connects_tried connects_tried $connects_tried_named connects_tried
SELECT * FROM status_end;

--disable_warnings
STOP ALL SLAVES;
SET @@SESSION.default_master_connection= 'named';
--source include/wait_for_slave_to_stop.inc
SET @@SESSION.default_master_connection= '';
--source include/wait_for_slave_to_stop.inc
--enable_warnings
--echo # STOP SLAVE does not reset `Connects_Tried`.
# That is, so the user can check this stat without leaving the slave spinning.
CREATE TEMPORARY TABLE status_stop AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
SELECT *
  FROM status_after JOIN status_stop USING(Connection_name)
  WHERE status_stop.Connects_Tried <> status_after.Connects_Tried;

--source include/start_slave.inc
--echo # START SLAVE recounts `Connects_Tried` from 1 (for the restarted connection only).
CREATE TEMPORARY TABLE status_restart AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
SELECT *
  FROM status_stop JOIN status_restart USING(Connection_name)
  WHERE status_restart.Connects_Tried NOT BETWEEN IF(
    Connection_name = '', 1, status_stop.Connects_Tried
  ) AND status_stop.Connects_Tried;

--source include/stop_slave.inc
# MDEV-36340 Master_Retry_Count should never be less than Connects_Tried
CHANGE MASTER TO Master_Retry_Count=777;
--echo # Setting `Master_Retry_Count` resets `Connects_Tried` to 0 (for the changed connection only).
CREATE TEMPORARY TABLE status_change AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
SELECT *
  FROM status_restart JOIN status_change USING(Connection_name)
  WHERE status_change.Connects_Tried <>
    IF(Connection_name = '', 0, status_restart.Connects_Tried);

--source include/start_slave.inc # build up Connects_Tried again
--source include/stop_slave.inc
RESET SLAVE;
--echo # RESET SLAVE resets `Connects_Tried` to 0 (for the resetted connection only).
CREATE TEMPORARY TABLE status_reset AS
  SELECT Connection_name, Connects_Tried FROM information_schema.SLAVE_STATUS;
SELECT *
  FROM status_change JOIN status_reset USING(Connection_name)
  WHERE status_reset.Connects_Tried <>
    IF(Connection_name = '', 0, status_change.Connects_Tried);

--echo # Cleanup
RESET SLAVE 'named' ALL;
--let $rpl_only_running_threads= 1
--source include/rpl_end.inc