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b6e436278f
to know what goes wrong. rpl_parallel_conflicts now contains the tests that can cause row conflicts in replication.
261 lines
6.3 KiB
Text
261 lines
6.3 KiB
Text
--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/master-slave.inc
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--echo *** MDEV-7847: "Slave worker thread retried transaction 10 time(s) in vain, giving up", followed by replication hanging ***
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--echo *** MDEV-7882: Excessive transaction retry in parallel replication ***
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--connection server_1
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ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
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CREATE TABLE t7 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
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CREATE TABLE t8 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
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--save_master_pos
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--connection server_2
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--sync_with_master
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--source include/stop_slave.inc
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# Using dbug error injection, we artificially create event groups with a lot of
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# conflicting transactions in each event group. The bugs were originally seen
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# "in the wild" with transactions that did not conflict on the master, and only
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# conflicted very rarely on the slave (maybe some edge case with InnoDB btree
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# page splits or something like that). The event groups here loosely reflect
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# the structure of the original failure's group commits.
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--connection server_1
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INSERT INTO t7 VALUES (1,1), (2,2), (3,3), (4,4), (5,5);
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SET @old_dbug= @@SESSION.debug_dbug;
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SET @commit_id= 42;
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SET SESSION debug_dbug="+d,binlog_force_commit_id";
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INSERT INTO t8 VALUES (1,1);
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INSERT INTO t8 VALUES (2,2);
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INSERT INTO t8 VALUES (3,3);
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INSERT INTO t8 VALUES (4,4);
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INSERT INTO t8 VALUES (5,5);
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INSERT INTO t8 VALUES (6,6);
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INSERT INTO t8 VALUES (7,7);
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INSERT INTO t8 VALUES (8,8);
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UPDATE t7 SET b=9 WHERE a=3;
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UPDATE t7 SET b=10 WHERE a=3;
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UPDATE t7 SET b=11 WHERE a=3;
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INSERT INTO t8 VALUES (12,12);
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INSERT INTO t8 VALUES (13,13);
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UPDATE t7 SET b=14 WHERE a=3;
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UPDATE t7 SET b=15 WHERE a=3;
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INSERT INTO t8 VALUES (16,16);
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UPDATE t7 SET b=17 WHERE a=3;
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INSERT INTO t8 VALUES (18,18);
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INSERT INTO t8 VALUES (19,19);
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UPDATE t7 SET b=20 WHERE a=3;
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INSERT INTO t8 VALUES (21,21);
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UPDATE t7 SET b=22 WHERE a=3;
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INSERT INTO t8 VALUES (23,24);
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INSERT INTO t8 VALUES (24,24);
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UPDATE t7 SET b=25 WHERE a=3;
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INSERT INTO t8 VALUES (26,26);
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UPDATE t7 SET b=27 WHERE a=3;
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BEGIN;
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INSERT INTO t8 VALUES (28,28);
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INSERT INTO t8 VALUES (29,28), (30,28);
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INSERT INTO t8 VALUES (31,28);
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INSERT INTO t8 VALUES (32,28);
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INSERT INTO t8 VALUES (33,28);
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INSERT INTO t8 VALUES (34,28);
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INSERT INTO t8 VALUES (35,28);
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INSERT INTO t8 VALUES (36,28);
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INSERT INTO t8 VALUES (37,28);
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INSERT INTO t8 VALUES (38,28);
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INSERT INTO t8 VALUES (39,28);
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INSERT INTO t8 VALUES (40,28);
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INSERT INTO t8 VALUES (41,28);
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INSERT INTO t8 VALUES (42,28);
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COMMIT;
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SET @commit_id=43;
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INSERT INTO t8 VALUES (43,43);
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INSERT INTO t8 VALUES (44,44);
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UPDATE t7 SET b=45 WHERE a=3;
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INSERT INTO t8 VALUES (46,46);
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INSERT INTO t8 VALUES (47,47);
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UPDATE t7 SET b=48 WHERE a=3;
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INSERT INTO t8 VALUES (49,49);
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INSERT INTO t8 VALUES (50,50);
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SET @commit_id=44;
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INSERT INTO t8 VALUES (51,51);
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INSERT INTO t8 VALUES (52,52);
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UPDATE t7 SET b=53 WHERE a=3;
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INSERT INTO t8 VALUES (54,54);
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INSERT INTO t8 VALUES (55,55);
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UPDATE t7 SET b=56 WHERE a=3;
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INSERT INTO t8 VALUES (57,57);
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UPDATE t7 SET b=58 WHERE a=3;
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INSERT INTO t8 VALUES (58,58);
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INSERT INTO t8 VALUES (59,59);
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INSERT INTO t8 VALUES (60,60);
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INSERT INTO t8 VALUES (61,61);
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UPDATE t7 SET b=62 WHERE a=3;
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INSERT INTO t8 VALUES (63,63);
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INSERT INTO t8 VALUES (64,64);
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INSERT INTO t8 VALUES (65,65);
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INSERT INTO t8 VALUES (66,66);
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UPDATE t7 SET b=67 WHERE a=3;
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INSERT INTO t8 VALUES (68,68);
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UPDATE t7 SET b=69 WHERE a=3;
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UPDATE t7 SET b=70 WHERE a=3;
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UPDATE t7 SET b=71 WHERE a=3;
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INSERT INTO t8 VALUES (72,72);
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UPDATE t7 SET b=73 WHERE a=3;
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UPDATE t7 SET b=74 WHERE a=3;
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UPDATE t7 SET b=75 WHERE a=3;
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UPDATE t7 SET b=76 WHERE a=3;
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INSERT INTO t8 VALUES (77,77);
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UPDATE t7 SET b=78 WHERE a=3;
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INSERT INTO t8 VALUES (79,79);
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UPDATE t7 SET b=80 WHERE a=3;
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INSERT INTO t8 VALUES (81,81);
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UPDATE t7 SET b=82 WHERE a=3;
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INSERT INTO t8 VALUES (83,83);
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UPDATE t7 SET b=84 WHERE a=3;
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SET @commit_id=45;
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INSERT INTO t8 VALUES (85,85);
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UPDATE t7 SET b=86 WHERE a=3;
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INSERT INTO t8 VALUES (87,87);
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SET @commit_id=46;
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INSERT INTO t8 VALUES (88,88);
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INSERT INTO t8 VALUES (89,89);
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INSERT INTO t8 VALUES (90,90);
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SET SESSION debug_dbug=@old_dbug;
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INSERT INTO t8 VALUES (91,91);
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INSERT INTO t8 VALUES (92,92);
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INSERT INTO t8 VALUES (93,93);
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INSERT INTO t8 VALUES (94,94);
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INSERT INTO t8 VALUES (95,95);
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INSERT INTO t8 VALUES (96,96);
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INSERT INTO t8 VALUES (97,97);
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INSERT INTO t8 VALUES (98,98);
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INSERT INTO t8 VALUES (99,99);
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SELECT * FROM t7 ORDER BY a;
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SELECT * FROM t8 ORDER BY a;
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--source include/save_master_gtid.inc
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--connection server_2
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--source include/start_slave.inc
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--source include/sync_with_master_gtid.inc
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SELECT * FROM t7 ORDER BY a;
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SELECT * FROM t8 ORDER BY a;
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--echo *** MDEV-8302: Duplicate key with parallel replication ***
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--connection server_2
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--source include/stop_slave.inc
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/* Inject a small sleep which makes the race easier to hit. */
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SET @old_dbug=@@GLOBAL.debug_dbug;
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SET GLOBAL debug_dbug="+d,inject_mdev8302";
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--connection server_1
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INSERT INTO t7 VALUES (100,1), (101,2), (102,3), (103,4), (104,5);
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# Artificially create a bunch of group commits with conflicting transactions.
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# The bug happened when T1 and T2 was in one group commit, and T3 was in the
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# following group commit. T2 is a DELETE of a row with same primary key as a
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# row that T3 inserts. T1 and T2 can conflict, causing T2 to be deadlock
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# killed after starting to commit. The bug was that T2 could roll back before
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# doing unmark_start_commit(); this could allow T3 to run before the retry
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# of T2, causing duplicate key violation.
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SET @old_dbug= @@SESSION.debug_dbug;
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SET @commit_id= 20000;
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SET SESSION debug_dbug="+d,binlog_force_commit_id";
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--let $n = 100
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--disable_query_log
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while ($n)
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{
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eval UPDATE t7 SET b=b+1 WHERE a=100+($n MOD 5);
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eval DELETE FROM t7 WHERE a=100+($n MOD 5);
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SET @commit_id = @commit_id + 1;
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eval INSERT INTO t7 VALUES (100+($n MOD 5), $n);
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SET @commit_id = @commit_id + 1;
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dec $n;
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}
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--enable_query_log
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SET SESSION debug_dbug=@old_dbug;
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SELECT * FROM t7 ORDER BY a;
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--source include/save_master_gtid.inc
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--connection server_2
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--source include/start_slave.inc
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--source include/sync_with_master_gtid.inc
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SELECT * FROM t7 ORDER BY a;
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--source include/stop_slave.inc
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SET GLOBAL debug_dbug=@old_dbug;
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# Clean up.
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--source include/start_slave.inc
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SET DEBUG_SYNC= 'RESET';
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--connection server_1
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DROP TABLE t7,t8;
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SET DEBUG_SYNC= 'RESET';
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--source include/rpl_end.inc
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