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Commit f573b65e authored by Kristian Nielsen's avatar Kristian Nielsen
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Merge MDEV-7847 and MDEV-7882 into 10.0. 

Conflicts:
	mysql-test/suite/rpl/r/rpl_parallel.result
	sql/rpl_parallel.cc
parents 59df1009 880f2273
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Showing with 518 additions and 21 deletions
mysql-test/suite/rpl/r/rpl_parallel.result
View file @ f573b65e
......@@ -1264,11 +1264,297 @@ a
include/stop_slave.inc
SET GLOBAL slave_parallel_mode='conservative';
include/start_slave.inc
*** MDEV-7847: "Slave worker thread retried transaction 10 time(s) in vain, giving up", followed by replication hanging ***
*** MDEV-7882: Excessive transaction retry in parallel replication ***
CREATE TABLE t7 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
CREATE TABLE t8 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=40;
SELECT @old_retries:=@@GLOBAL.slave_transaction_retries;
@old_retries:=@@GLOBAL.slave_transaction_retries
10
SET GLOBAL slave_transaction_retries= 5;
INSERT INTO t7 VALUES (1,1), (2,2), (3,3), (4,4), (5,5);
SET @old_dbug= @@SESSION.debug_dbug;
SET @commit_id= 42;
SET SESSION debug_dbug="+d,binlog_force_commit_id";
INSERT INTO t8 VALUES (1,1);
INSERT INTO t8 VALUES (2,2);
INSERT INTO t8 VALUES (3,3);
INSERT INTO t8 VALUES (4,4);
INSERT INTO t8 VALUES (5,5);
INSERT INTO t8 VALUES (6,6);
INSERT INTO t8 VALUES (7,7);
INSERT INTO t8 VALUES (8,8);
UPDATE t7 SET b=9 WHERE a=3;
UPDATE t7 SET b=10 WHERE a=3;
UPDATE t7 SET b=11 WHERE a=3;
INSERT INTO t8 VALUES (12,12);
INSERT INTO t8 VALUES (13,13);
UPDATE t7 SET b=14 WHERE a=3;
UPDATE t7 SET b=15 WHERE a=3;
INSERT INTO t8 VALUES (16,16);
UPDATE t7 SET b=17 WHERE a=3;
INSERT INTO t8 VALUES (18,18);
INSERT INTO t8 VALUES (19,19);
UPDATE t7 SET b=20 WHERE a=3;
INSERT INTO t8 VALUES (21,21);
UPDATE t7 SET b=22 WHERE a=3;
INSERT INTO t8 VALUES (23,24);
INSERT INTO t8 VALUES (24,24);
UPDATE t7 SET b=25 WHERE a=3;
INSERT INTO t8 VALUES (26,26);
UPDATE t7 SET b=27 WHERE a=3;
BEGIN;
INSERT INTO t8 VALUES (28,28);
INSERT INTO t8 VALUES (29,28), (30,28);
INSERT INTO t8 VALUES (31,28);
INSERT INTO t8 VALUES (32,28);
INSERT INTO t8 VALUES (33,28);
INSERT INTO t8 VALUES (34,28);
INSERT INTO t8 VALUES (35,28);
INSERT INTO t8 VALUES (36,28);
INSERT INTO t8 VALUES (37,28);
INSERT INTO t8 VALUES (38,28);
INSERT INTO t8 VALUES (39,28);
INSERT INTO t8 VALUES (40,28);
INSERT INTO t8 VALUES (41,28);
INSERT INTO t8 VALUES (42,28);
COMMIT;
SET @commit_id=43;
INSERT INTO t8 VALUES (43,43);
INSERT INTO t8 VALUES (44,44);
UPDATE t7 SET b=45 WHERE a=3;
INSERT INTO t8 VALUES (46,46);
INSERT INTO t8 VALUES (47,47);
UPDATE t7 SET b=48 WHERE a=3;
INSERT INTO t8 VALUES (49,49);
INSERT INTO t8 VALUES (50,50);
SET @commit_id=44;
INSERT INTO t8 VALUES (51,51);
INSERT INTO t8 VALUES (52,52);
UPDATE t7 SET b=53 WHERE a=3;
INSERT INTO t8 VALUES (54,54);
INSERT INTO t8 VALUES (55,55);
UPDATE t7 SET b=56 WHERE a=3;
INSERT INTO t8 VALUES (57,57);
UPDATE t7 SET b=58 WHERE a=3;
INSERT INTO t8 VALUES (58,58);
INSERT INTO t8 VALUES (59,59);
INSERT INTO t8 VALUES (60,60);
INSERT INTO t8 VALUES (61,61);
UPDATE t7 SET b=62 WHERE a=3;
INSERT INTO t8 VALUES (63,63);
INSERT INTO t8 VALUES (64,64);
INSERT INTO t8 VALUES (65,65);
INSERT INTO t8 VALUES (66,66);
UPDATE t7 SET b=67 WHERE a=3;
INSERT INTO t8 VALUES (68,68);
UPDATE t7 SET b=69 WHERE a=3;
UPDATE t7 SET b=70 WHERE a=3;
UPDATE t7 SET b=71 WHERE a=3;
INSERT INTO t8 VALUES (72,72);
UPDATE t7 SET b=73 WHERE a=3;
UPDATE t7 SET b=74 WHERE a=3;
UPDATE t7 SET b=75 WHERE a=3;
UPDATE t7 SET b=76 WHERE a=3;
INSERT INTO t8 VALUES (77,77);
UPDATE t7 SET b=78 WHERE a=3;
INSERT INTO t8 VALUES (79,79);
UPDATE t7 SET b=80 WHERE a=3;
INSERT INTO t8 VALUES (81,81);
UPDATE t7 SET b=82 WHERE a=3;
INSERT INTO t8 VALUES (83,83);
UPDATE t7 SET b=84 WHERE a=3;
SET @commit_id=45;
INSERT INTO t8 VALUES (85,85);
UPDATE t7 SET b=86 WHERE a=3;
INSERT INTO t8 VALUES (87,87);
SET @commit_id=46;
INSERT INTO t8 VALUES (88,88);
INSERT INTO t8 VALUES (89,89);
INSERT INTO t8 VALUES (90,90);
SET SESSION debug_dbug=@old_dbug;
INSERT INTO t8 VALUES (91,91);
INSERT INTO t8 VALUES (92,92);
INSERT INTO t8 VALUES (93,93);
INSERT INTO t8 VALUES (94,94);
INSERT INTO t8 VALUES (95,95);
INSERT INTO t8 VALUES (96,96);
INSERT INTO t8 VALUES (97,97);
INSERT INTO t8 VALUES (98,98);
INSERT INTO t8 VALUES (99,99);
SELECT * FROM t7 ORDER BY a;
a b
1 1
2 2
3 86
4 4
5 5
SELECT * FROM t8 ORDER BY a;
a b
1 1
2 2
3 3
4 4
5 5
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7 7
8 8
12 12
13 13
16 16
18 18
19 19
21 21
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94 94
95 95
96 96
97 97
98 98
99 99
include/save_master_gtid.inc
include/start_slave.inc
include/sync_with_master_gtid.inc
SELECT * FROM t7 ORDER BY a;
a b
1 1
2 2
3 86
4 4
5 5
SELECT * FROM t8 ORDER BY a;
a b
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
12 12
13 13
16 16
18 18
19 19
21 21
23 24
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include/stop_slave.inc
SET GLOBAL slave_transaction_retries= @old_retries;
include/start_slave.inc
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc
SET DEBUG_SYNC= 'RESET';
DROP function foo;
DROP TABLE t1,t2,t3,t4,t5,t6;
DROP TABLE t1,t2,t3,t4,t5,t6,t7,t8;
SET DEBUG_SYNC= 'RESET';
include/rpl_end.inc
mysql-test/suite/rpl/t/rpl_parallel.test
View file @ f573b65e
......@@ -1959,6 +1959,208 @@ SET GLOBAL slave_parallel_mode='conservative';
--source include/start_slave.inc
--echo *** MDEV-7847: "Slave worker thread retried transaction 10 time(s) in vain, giving up", followed by replication hanging ***
--echo *** MDEV-7882: Excessive transaction retry in parallel replication ***
--connection server_1
CREATE TABLE t7 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
CREATE TABLE t8 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
--save_master_pos
--connection server_2
--sync_with_master
--source include/stop_slave.inc
SET GLOBAL slave_parallel_threads=40;
SELECT @old_retries:=@@GLOBAL.slave_transaction_retries;
SET GLOBAL slave_transaction_retries= 5;
# Using dbug error injection, we artificially create event groups with a lot of
# conflicting transactions in each event group. The bugs were originally seen
# "in the wild" with transactions that did not conflict on the master, and only
# conflicted very rarely on the slave (maybe some edge case with InnoDB btree
# page splits or something like that). The event groups here loosely reflect
# the structure of the original failure's group commits.
--connection server_1
INSERT INTO t7 VALUES (1,1), (2,2), (3,3), (4,4), (5,5);
SET @old_dbug= @@SESSION.debug_dbug;
SET @commit_id= 42;
SET SESSION debug_dbug="+d,binlog_force_commit_id";
INSERT INTO t8 VALUES (1,1);
INSERT INTO t8 VALUES (2,2);
INSERT INTO t8 VALUES (3,3);
INSERT INTO t8 VALUES (4,4);
INSERT INTO t8 VALUES (5,5);
INSERT INTO t8 VALUES (6,6);
INSERT INTO t8 VALUES (7,7);
INSERT INTO t8 VALUES (8,8);
UPDATE t7 SET b=9 WHERE a=3;
UPDATE t7 SET b=10 WHERE a=3;
UPDATE t7 SET b=11 WHERE a=3;
INSERT INTO t8 VALUES (12,12);
INSERT INTO t8 VALUES (13,13);
UPDATE t7 SET b=14 WHERE a=3;
UPDATE t7 SET b=15 WHERE a=3;
INSERT INTO t8 VALUES (16,16);
UPDATE t7 SET b=17 WHERE a=3;
INSERT INTO t8 VALUES (18,18);
INSERT INTO t8 VALUES (19,19);
UPDATE t7 SET b=20 WHERE a=3;
INSERT INTO t8 VALUES (21,21);
UPDATE t7 SET b=22 WHERE a=3;
INSERT INTO t8 VALUES (23,24);
INSERT INTO t8 VALUES (24,24);
UPDATE t7 SET b=25 WHERE a=3;
INSERT INTO t8 VALUES (26,26);
UPDATE t7 SET b=27 WHERE a=3;
BEGIN;
INSERT INTO t8 VALUES (28,28);
INSERT INTO t8 VALUES (29,28), (30,28);
INSERT INTO t8 VALUES (31,28);
INSERT INTO t8 VALUES (32,28);
INSERT INTO t8 VALUES (33,28);
INSERT INTO t8 VALUES (34,28);
INSERT INTO t8 VALUES (35,28);
INSERT INTO t8 VALUES (36,28);
INSERT INTO t8 VALUES (37,28);
INSERT INTO t8 VALUES (38,28);
INSERT INTO t8 VALUES (39,28);
INSERT INTO t8 VALUES (40,28);
INSERT INTO t8 VALUES (41,28);
INSERT INTO t8 VALUES (42,28);
COMMIT;
SET @commit_id=43;
INSERT INTO t8 VALUES (43,43);
INSERT INTO t8 VALUES (44,44);
UPDATE t7 SET b=45 WHERE a=3;
INSERT INTO t8 VALUES (46,46);
INSERT INTO t8 VALUES (47,47);
UPDATE t7 SET b=48 WHERE a=3;
INSERT INTO t8 VALUES (49,49);
INSERT INTO t8 VALUES (50,50);
SET @commit_id=44;
INSERT INTO t8 VALUES (51,51);
INSERT INTO t8 VALUES (52,52);
UPDATE t7 SET b=53 WHERE a=3;
INSERT INTO t8 VALUES (54,54);
INSERT INTO t8 VALUES (55,55);
UPDATE t7 SET b=56 WHERE a=3;
INSERT INTO t8 VALUES (57,57);
UPDATE t7 SET b=58 WHERE a=3;
INSERT INTO t8 VALUES (58,58);
INSERT INTO t8 VALUES (59,59);
INSERT INTO t8 VALUES (60,60);
INSERT INTO t8 VALUES (61,61);
UPDATE t7 SET b=62 WHERE a=3;
INSERT INTO t8 VALUES (63,63);
INSERT INTO t8 VALUES (64,64);
INSERT INTO t8 VALUES (65,65);
INSERT INTO t8 VALUES (66,66);
UPDATE t7 SET b=67 WHERE a=3;
INSERT INTO t8 VALUES (68,68);
UPDATE t7 SET b=69 WHERE a=3;
UPDATE t7 SET b=70 WHERE a=3;
UPDATE t7 SET b=71 WHERE a=3;
INSERT INTO t8 VALUES (72,72);
UPDATE t7 SET b=73 WHERE a=3;
UPDATE t7 SET b=74 WHERE a=3;
UPDATE t7 SET b=75 WHERE a=3;
UPDATE t7 SET b=76 WHERE a=3;
INSERT INTO t8 VALUES (77,77);
UPDATE t7 SET b=78 WHERE a=3;
INSERT INTO t8 VALUES (79,79);
UPDATE t7 SET b=80 WHERE a=3;
INSERT INTO t8 VALUES (81,81);
UPDATE t7 SET b=82 WHERE a=3;
INSERT INTO t8 VALUES (83,83);
UPDATE t7 SET b=84 WHERE a=3;
SET @commit_id=45;
INSERT INTO t8 VALUES (85,85);
UPDATE t7 SET b=86 WHERE a=3;
INSERT INTO t8 VALUES (87,87);
SET @commit_id=46;
INSERT INTO t8 VALUES (88,88);
INSERT INTO t8 VALUES (89,89);
INSERT INTO t8 VALUES (90,90);
SET SESSION debug_dbug=@old_dbug;
INSERT INTO t8 VALUES (91,91);
INSERT INTO t8 VALUES (92,92);
INSERT INTO t8 VALUES (93,93);
INSERT INTO t8 VALUES (94,94);
INSERT INTO t8 VALUES (95,95);
INSERT INTO t8 VALUES (96,96);
INSERT INTO t8 VALUES (97,97);
INSERT INTO t8 VALUES (98,98);
INSERT INTO t8 VALUES (99,99);
SELECT * FROM t7 ORDER BY a;
SELECT * FROM t8 ORDER BY a;
--source include/save_master_gtid.inc
--connection server_2
--source include/start_slave.inc
--source include/sync_with_master_gtid.inc
SELECT * FROM t7 ORDER BY a;
SELECT * FROM t8 ORDER BY a;
--source include/stop_slave.inc
SET GLOBAL slave_transaction_retries= @old_retries;
--source include/start_slave.inc
# Clean up.
--connection server_2
--source include/stop_slave.inc
......@@ -1968,7 +2170,7 @@ SET DEBUG_SYNC= 'RESET';
--connection server_1
DROP function foo;
DROP TABLE t1,t2,t3,t4,t5,t6;
DROP TABLE t1,t2,t3,t4,t5,t6,t7,t8;
SET DEBUG_SYNC= 'RESET';
--source include/rpl_end.inc
sql/log.cc
View file @ f573b65e
......@@ -7360,6 +7360,15 @@ MYSQL_BIN_LOG::trx_group_commit_leader(group_commit_entry *leader)
if (likely(is_open())) // Should always be true
{
commit_id= (last_in_queue == leader ? 0 : (uint64)leader->thd->query_id);
DBUG_EXECUTE_IF("binlog_force_commit_id",
{
const LEX_STRING name= { C_STRING_WITH_LEN("commit_id") };
bool null_value;
user_var_entry *entry=
(user_var_entry*) my_hash_search(&leader->thd->user_vars,
(uchar*) name.str, name.length);
commit_id= entry->val_int(&null_value);
});
/*
Commit every transaction in the queue.
......
sql/rpl_parallel.cc
View file @ f573b65e
......@@ -112,6 +112,7 @@ finish_event_group(rpl_parallel_thread *rpt, uint64 sub_id,
wait_for_commit *wfc= &rgi->commit_orderer;
int err;
thd->get_stmt_da()->set_overwrite_status(true);
/*
Remove any left-over registration to wait for a prior commit to
complete. Normally, such wait would already have been removed at
......@@ -128,14 +129,14 @@ finish_event_group(rpl_parallel_thread *rpt, uint64 sub_id,
for us to complete and rely on this also ensuring that any other
event in the group has completed.
But in the error case, we have to abort anyway, and it seems best
to just complete as quickly as possible with unregister. Anyone
waiting for us will in any case receive the error back from their
wait_for_prior_commit() call.
And in the error case, correct GCO lifetime relies on the fact that once
the last event group in the GCO has executed wait_for_prior_commit(),
all earlier event groups have also committed; this way no more
mark_start_commit() calls can be made and it is safe to de-allocate
the GCO.
*/
if (rgi->worker_error)
wfc->unregister_wait_for_prior_commit();
else if ((err= wfc->wait_for_prior_commit(thd)))
err= wfc->wait_for_prior_commit(thd);
if (unlikely(err) && !rgi->worker_error)
signal_error_to_sql_driver_thread(thd, rgi, err);
thd->wait_for_commit_ptr= NULL;
......@@ -192,6 +193,10 @@ finish_event_group(rpl_parallel_thread *rpt, uint64 sub_id,
thd->clear_error();
thd->reset_killed();
/*
Would do thd->get_stmt_da()->set_overwrite_status(false) here, but
reset_diagnostics_area() already does that.
*/
thd->get_stmt_da()->reset_diagnostics_area();
wfc->wakeup_subsequent_commits(rgi->worker_error);
}
......@@ -385,16 +390,10 @@ retry_event_group(rpl_group_info *rgi, rpl_parallel_thread *rpt,
register_wait_for_prior_event_group_commit(rgi, entry);
mysql_mutex_unlock(&entry->LOCK_parallel_entry);
if (rgi->speculation != rpl_group_info::SPECULATE_OPTIMISTIC)
break;
/*
We speculatively tried to run this in parallel with prior event groups,
but it did not work for some reason.
So let us wait for all prior transactions to complete before trying
again. This way, we avoid repeatedly retrying and failing a small
transaction that conflicts with a prior long-running one.
Let us wait for all prior transactions to complete before trying again.
This way, we avoid repeatedly conflicting with and getting deadlock
killed by the same earlier transaction.
*/
if (!(err= thd->wait_for_prior_commit()))
{
......@@ -800,7 +799,6 @@ handle_rpl_parallel_thread(void *arg)
if (unlikely(entry->stop_on_error_sub_id <= rgi->wait_commit_sub_id))
skip_event_group= true;
else
register_wait_for_prior_event_group_commit(rgi, entry);
unlock_or_exit_cond(thd, &entry->LOCK_parallel_entry,
......@@ -888,7 +886,9 @@ handle_rpl_parallel_thread(void *arg)
else
{
delete qev->ev;
thd->get_stmt_da()->set_overwrite_status(true);
err= thd->wait_for_prior_commit();
thd->get_stmt_da()->set_overwrite_status(false);
}
end_of_group=
......
sql/rpl_parallel.h
View file @ f573b65e
......@@ -53,7 +53,7 @@ struct group_commit_orderer {
group_commit_orderer *prev_gco;
group_commit_orderer *next_gco;
/*
The sub_id of last event group in this the previous GCO.
The sub_id of last event group in the previous GCO.
Only valid if prev_gco != NULL.
*/
uint64 prior_sub_id;
......
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