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09c80e12c5
Major replication test framework cleanup. This does the following:
- Ensure that all tests clean up the replication state when they
finish, by making check-testcase check the output of SHOW SLAVE STATUS.
This implies:
- Slave must not be running after test finished. This is good
because it removes the risk for sporadic errors in subsequent
tests when a test forgets to sync correctly.
- Slave SQL and IO errors must be cleared when test ends. This is
good because we will notice if a test gets an unexpected error in
the slave threads near the end.
- We no longer have to clean up before a test starts.
- Ensure that all tests that wait for an error in one of the slave
threads waits for a specific error. It is no longer possible to
source wait_for_slave_[sql|io]_to_stop.inc when there is an error
in one of the slave threads. This is good because:
- If a test expects an error but there is a bug that causes
another error to happen, or if it stops the slave thread without
an error, then we will notice.
- When developing tests, wait_for_*_to_[start|stop].inc will fail
immediately if there is an error in the relevant slave thread.
Before this patch, we had to wait for the timeout.
- Remove duplicated and repeated code for setting up unusual replication
topologies. Now, there is a single file that is capable of setting
up arbitrary topologies (include/rpl_init.inc, but
include/master-slave.inc is still available for the most common
topology). Tests can now end with include/rpl_end.inc, which will clean
up correctly no matter what topology is used. The topology can be
changed with include/rpl_change_topology.inc.
- Improved debug information when tests fail. This includes:
- debug info is printed on all servers configured by include/rpl_init.inc
- User can set $rpl_debug=1, which makes auxiliary replication files
print relevant debug info.
- Improved documentation for all auxiliary replication files. Now they
describe purpose, usage, parameters, and side effects.
- Many small code cleanups:
- Made have_innodb.inc output a sensible error message.
- Moved contents of rpl000017-slave.sh into rpl000017.test
- Added mysqltest variables that expose the current state of
disable_warnings/enable_warnings and friends.
- Too many to list here: see per-file comments for details.
100 lines
2.9 KiB
Plaintext
100 lines
2.9 KiB
Plaintext
# ==== Purpose ====
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#
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# Tests that an autocommitted XA transaction where the master crashes
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# just before writing the XID log event is executed correctly. The
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# master rolls back, so the slave should not execute statement.
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#
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# This test was previously part of rpl_ndb_transaction.test
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#
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#
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# ==== Method ====
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#
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# We want master to be alive so that it can replicate the statement to
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# the slave. So in the test case, we must not crash the
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# master. Instead, we fake the crash by just not writing the XID event
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# to the binlog. This is done by the @@debug='d,do_not_write_xid'
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# flag. This, in turn, requires us to do 'source
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# include/have_debug.inc'
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#
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# So, unlike if the master had crashed, the master *will* execute the
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# statement. But the slave should not execute it. Hence, after the
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# test is executed, the expected result on master is a table with one
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# row, and on slave a table with no rows.
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#
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# To simulate the slave correctly, we wait until everything up to but
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# not including the XID is replicated. This has to be done with
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# include/sync_slave_io_with_master.inc, not sync_slave_with_master,
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# since the latter waits until the slave *SQL* thread has caught up
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# with the master's position, which it will never do.
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#
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#
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# ==== Related bugs ====
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#
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# BUG#26395: if crash during autocommit update to transactional table on master, slave fails
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source include/have_innodb.inc;
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# have_debug is needed since we use the @@debug variable on master
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source include/have_debug.inc;
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source include/master-slave.inc;
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--echo ==== Initialize ====
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--echo [on master]
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--connection master
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CREATE TABLE tinnodb (a INT) ENGINE = INNODB;
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SHOW CREATE TABLE tinnodb;
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# do_not_write_xid stops the master from writing an XID event.
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set @old_debug= @@debug;
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set @@debug= 'd,do_not_write_xid';
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--echo ==== Test ====
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# Save the position up to which the slave SQL thread should execute.
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save_master_pos;
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# Execute query and check that the row made it to the table.
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INSERT INTO tinnodb VALUES (1);
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SELECT * FROM tinnodb ORDER BY a;
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# Sync slave's IO thread.
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--echo [on slave]
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source include/sync_slave_io_with_master.inc;
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# Sync slave's SQL thread.
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sync_with_master 0;
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--echo ==== Verify results on slave ====
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source include/stop_slave.inc;
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let $tmp= query_get_value("SHOW SLAVE STATUS", Slave_IO_State, 1);
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eval SELECT "$tmp" AS Slave_IO_State;
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let $tmp= query_get_value("SHOW SLAVE STATUS", Last_SQL_Error, 1);
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eval SELECT "$tmp" AS Last_SQL_Error;
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let $tmp= query_get_value("SHOW SLAVE STATUS", Last_IO_Error, 1);
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eval SELECT "$tmp" AS Last_IO_Error;
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SELECT * FROM tinnodb ORDER BY a;
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--echo ==== Clean up ====
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# Easiest to clean up master and slave separately, without
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# replication, since master and slave are out of sync.
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--echo [on master]
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connection master;
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DROP TABLE tinnodb;
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set @@debug= @old_debug;
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--echo [on slave]
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connection slave;
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DROP TABLE tinnodb;
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# Warning: do not add more tests here. The binlog is in a bad state.
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--let $rpl_only_running_threads= 1
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--source include/rpl_end.inc
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