1--source include/have_innodb.inc
2--source include/have_debug.inc
3--source include/master-slave.inc
4
5--connection slave
6--source include/stop_slave.inc
7# Since we inject an error updating mysql.gtid_slave_pos, we will get different
8# output depending on whether it is InnoDB or MyISAM (roll back or no roll
9# back). So fix it to make sure we are consistent, in case an earlier test case
10# left it as InnoDB.
11SET sql_log_bin=0;
12ALTER TABLE mysql.gtid_slave_pos ENGINE=Aria;
13SET sql_log_bin=1;
14--source include/start_slave.inc
15
16--connection master
17CREATE TABLE t1 (i int) ENGINE=InnoDB;
18
19--sync_slave_with_master
20
21--echo *** MDEV-4484, incorrect error handling when entries in gtid_slave_pos not found. ***
22TRUNCATE TABLE mysql.gtid_slave_pos;
23
24--connection master
25INSERT INTO t1 VALUES (1);
26--sync_slave_with_master
27
28# Inject an artificial error deleting entries, and check that the error handling code works.
29--connection slave
30--source include/stop_slave.inc
31SET @old_gtid_cleanup_batch_size= @@GLOBAL.gtid_cleanup_batch_size;
32SET GLOBAL gtid_cleanup_batch_size= 2;
33SET @old_dbug= @@GLOBAL.debug_dbug;
34SET GLOBAL debug_dbug="+d,gtid_slave_pos_simulate_failed_delete";
35SET sql_log_bin= 0;
36CALL mtr.add_suppression("<DEBUG> Error deleting old GTID row");
37SET sql_log_bin= 1;
38--source include/start_slave.inc
39
40--connection master
41--disable_query_log
42let $i = 20;
43while ($i) {
44  eval INSERT INTO t1 VALUES ($i+10);
45  dec $i;
46}
47--enable_query_log
48--save_master_pos
49
50--connection slave
51--sync_with_master
52
53# Now wait for the slave background thread to try to delete old rows and
54# hit the error injection.
55--let _TEST_MYSQLD_ERROR_LOG=$MYSQLTEST_VARDIR/log/mysqld.2.err
56--perl
57  open F, '<', $ENV{'_TEST_MYSQLD_ERROR_LOG'} or die;
58  outer: while (1) {
59    inner: while (<F>) {
60      last outer if /<DEBUG> Error deleting old GTID row/;
61    }
62    # Easy way to do sub-second sleep without extra modules.
63    select(undef, undef, undef, 0.1);
64  }
65EOF
66
67# Since we injected error in the cleanup code, the rows should remain in
68# mysql.gtid_slave_pos. Check that we have at least 20 (more robust against
69# non-deterministic cleanup and future changes than checking for exact number).
70SELECT COUNT(*), MAX(seq_no) INTO @pre_count, @pre_max_seq_no
71  FROM mysql.gtid_slave_pos;
72SELECT IF(@pre_count >= 20, "OK", CONCAT("Error: too few rows seen while errors injected: ", @pre_count));
73SET GLOBAL debug_dbug= @old_dbug;
74
75--connection master
76--disable_query_log
77let $i = 20;
78while ($i) {
79  eval INSERT INTO t1 VALUES ($i+40);
80  dec $i;
81}
82--enable_query_log
83--sync_slave_with_master
84
85--connection slave
86# Now check that 1) rows are being deleted again after removing error
87# injection, and 2) old rows are left that failed their delete while errors
88# where injected (again compensating for non-deterministic deletion).
89# Deletion is async and slightly non-deterministic, so we wait for at
90# least 10 of the 20 new rows to be deleted.
91let $wait_condition=
92  SELECT COUNT(*) <= 20-10
93    FROM mysql.gtid_slave_pos
94   WHERE seq_no > @pre_max_seq_no;
95--source include/wait_condition.inc
96SELECT IF(COUNT(*) >= 1, "OK", CONCAT("Error: too few rows seen after errors no longer injected: ", COUNT(*)))
97  FROM mysql.gtid_slave_pos
98 WHERE seq_no <= @pre_max_seq_no;
99
100# Clean up
101--connection master
102DROP TABLE t1;
103--connection slave
104SET GLOBAL gtid_cleanup_batch_size= @old_gtid_cleanup_batch_size;
105
106--source include/rpl_end.inc
107