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The test case makes use of the fine DEBUG_SYNC facility. Furthermore, since it needs synchronization on internal threads (dump and SQL threads) the server code has DEBUG_SYNC commands internally deployed and activated through the DBUG_EXECUTE_IF macro. The internal DBUG_SYNC commands are then controlled from the test case through the DEBUG variable. There were three problems around the DEBUG + DEBUG_SYNC facility usage: 1. When signaling the SQL thread to continue, the test would reset immediately the DEBUG_SYNC variable. This could mean that the SQL thread might loose the signal and continue to wait forever; 2. A similar scenario was happening with the dump thread on the master. This thread was instructed to wait, and later it would be signaled to continue, but immediately after the DEBUG_SYNC would be reset. This could lead to the dump thread missing the signal and wait forever; 3. The test was not cleaning itself up with respect to the instrumentation of the dump thread. This would leave the conditional execution of an internal DEBUG_SYNC command active (through the usage of DBUG_EXECUTE_IF). We fix #1 and #2 by waiting for the threads to receive the signal and only then issue the reset. We fix #3 by reseting the DEBUG variable, thus deactivating the dump thread internal DEBUG_SYNC command.
145 lines
4.9 KiB
Plaintext
145 lines
4.9 KiB
Plaintext
source include/master-slave.inc;
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source include/have_innodb.inc;
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source include/have_debug.inc;
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source include/have_debug_sync.inc;
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source include/have_binlog_format_mixed_or_statement.inc;
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--echo
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--echo # BUG#56118 STOP SLAVE does not wait till trx with CREATE TMP TABLE ends
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--echo #
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--echo # If a temporary table is created or dropped, the transaction should be
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--echo # regarded similarly that a non-transactional table is modified. So
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--echo # STOP SLAVE should wait until the transaction has finished.
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CREATE TABLE t1(c1 INT) ENGINE=InnoDB;
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CREATE TABLE t2(c1 INT) ENGINE=InnoDB;
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sync_slave_with_master;
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SET DEBUG_SYNC= 'RESET';
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source include/stop_slave.inc;
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--echo
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--echo # Suspend the INSERT statement in current transaction on SQL thread.
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--echo # It guarantees that SQL thread is applying the transaction when
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--echo # STOP SLAVE command launchs.
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let $debug_save= `SELECT @@GLOBAL.debug`;
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SET GLOBAL debug= 'd,after_mysql_insert';
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source include/start_slave.inc;
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--echo
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--echo # CREATE TEMPORARY TABLE with InnoDB engine
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--echo # -----------------------------------------
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let $tmp_table_stm= CREATE TEMPORARY TABLE tt1(c1 INT) ENGINE = InnoDB;
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source extra/rpl_tests/rpl_stop_slave.test;
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--echo
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--echo # CREATE TEMPORARY TABLE ... SELECT with InnoDB engine
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--echo # ----------------------------------------------------
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let $tmp_table_stm= CREATE TEMPORARY TABLE tt1(c1 INT) ENGINE = InnoDB
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SELECT c1 FROM t2;
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source extra/rpl_tests/rpl_stop_slave.test;
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# Don't need to verify 'CREATE TEMPORARY TABLE' with MyIASM engine, as it
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# never is binlogged into a transaction since 5.5.
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--echo
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--echo # Test end
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SET GLOBAL debug= '$debug_save';
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source include/restart_slave_sql.inc;
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connection slave;
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call mtr.add_suppression("Slave SQL.*Request to stop slave SQL Thread received while applying a group that has non-transactional changes; waiting for completion of the group");
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connection master;
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--source include/rpl_connection_master.inc
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DROP TABLE t1, t2;
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--echo
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--echo # Bug#58546 test rpl_packet timeout failure sporadically on PB
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--echo # ----------------------------------------------------------------------
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--echo # STOP SLAVE stopped IO thread first and then stopped SQL thread. It was
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--echo # possible that IO thread stopped after replicating part of a transaction
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--echo # which SQL thread was executing. SQL thread would be hung if the
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--echo # transaction could not be rolled back safely.
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--echo # It caused some sporadic failures on PB2.
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--echo #
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--echo # This test verifies that when 'STOP SLAVE' is issued by a user, IO
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--echo # thread will continue to fetch the rest events of the transaction which
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--echo # is being executed by SQL thread and is not able to be rolled back safely.
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CREATE TABLE t1 (c1 INT KEY, c2 INT) ENGINE=InnoDB;
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CREATE TABLE t2 (c1 INT) ENGINE=MyISAM;
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INSERT INTO t1 VALUES(1, 1);
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sync_slave_with_master;
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--source include/stop_slave.inc
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--source include/rpl_connection_master.inc
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# make sure that there are no zombie threads
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--source include/stop_dump_threads.inc
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let $debug_save= `SELECT @@GLOBAL.debug`;
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SET GLOBAL debug= 'd,dump_thread_wait_before_send_xid';
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--source include/rpl_connection_slave.inc
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--source include/start_slave.inc
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BEGIN;
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UPDATE t1 SET c2 = 2 WHERE c1 = 1;
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--source include/rpl_connection_master.inc
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BEGIN;
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INSERT INTO t1 VALUES(2, 2);
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INSERT INTO t2 VALUES(1);
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UPDATE t1 SET c2 = 3 WHERE c1 = 1;
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COMMIT;
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# wait for the dump thread reach the sync point
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--let $wait_condition= select count(*)=1 from information_schema.processlist where state LIKE '%debug sync point%' and command='Binlog Dump'
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--source include/wait_condition.inc
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--source include/rpl_connection_slave1.inc
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let $show_statement= SHOW PROCESSLIST;
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let $field= Info;
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let $condition= = 'UPDATE t1 SET c2 = 3 WHERE c1 = 1';
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source include/wait_show_condition.inc;
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send STOP SLAVE;
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--source include/rpl_connection_slave.inc
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ROLLBACK;
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--source include/rpl_connection_master.inc
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SET DEBUG_SYNC= 'now SIGNAL signal.continue';
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# wait for the dump thread to come out of the
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# waiting phase before resetting the signals
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--let $wait_condition= select count(*)=0 from information_schema.processlist where state LIKE '%debug sync point%' and command='Binlog Dump'
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--source include/wait_condition.inc
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SET DEBUG_SYNC= 'RESET';
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--source include/rpl_connection_slave.inc
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source include/wait_for_slave_to_stop.inc;
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--source include/rpl_connection_slave1.inc
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reap;
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# Slave has stopped, thence lets make sure that
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# we kill the zombie dump threads. Also, make
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# sure that we disable the DBUG_EXECUTE_IF
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# that would set the dump thread to wait
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--source include/rpl_connection_master.inc
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SET GLOBAL debug= '$debug_save';
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# make sure that there are no zombie threads
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--source include/stop_dump_threads.inc
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--source include/rpl_connection_slave1.inc
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# now the dump thread on the master will start
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# from a clean slate, i.e. without the
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# DBUG_EXECUTE_IF set
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source include/start_slave.inc;
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--source include/rpl_connection_master.inc
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DROP TABLE t1, t2;
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--source include/rpl_end.inc
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