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MDEV-5262: Missing retry after temp error in parallel replication

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Implement that if first retry fails, we can do another attempt.

Add testcases to test multi-retry that succeeds in second attempt, and
multi-retry that eventually fails due to exceeding slave_trans_retries.
This commit is contained in:
unknown 2014-05-13 13:42:06 +02:00 committed by Kristian Nielsen
parent b0b60f2498
commit d60915692c
3 changed files with 217 additions and 36 deletions
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95
mysql-test/suite/rpl/r/rpl_parallel_retry.result
View File

@ -28,23 +28,21 @@ END IF;
RETURN x;
END
||
SET sql_log_bin=1;
include/stop_slave.inc
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
SET gtid_seq_no = 100;
BEGIN;
INSERT INTO t1 VALUES (2,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (3,1);
COMMIT;
SET binlog_format=@old_format;
SELECT * FROM t1 ORDER BY a;
a b
1 2
2 1
3 1
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_1_100";
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100";
include/start_slave.inc
SET GLOBAL debug_dbug=@old_dbug;
retries
@ -54,6 +52,95 @@ a b
1 2
2 1
3 1
*** Test that double retry works when the first retry also fails with temp error ***
include/stop_slave.inc
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 10;
BEGIN;
INSERT INTO t1 VALUES (4,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (5,1);
INSERT INTO t1 VALUES (6,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
a b
1 3
2 1
3 1
4 1
5 1
6 1
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_double_temp_err_gtid_0_x_100";
include/start_slave.inc
SET GLOBAL debug_dbug=@old_dbug;
retries
2
SELECT * FROM t1 ORDER BY a;
a b
1 3
2 1
3 1
4 1
5 1
6 1
*** Test too many retries, eventually causing failure. ***
include/stop_slave.inc
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 11;
BEGIN;
INSERT INTO t1 VALUES (7,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (8,1);
INSERT INTO t1 VALUES (9,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
a b
1 4
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
SET sql_log_bin=0;
CALL mtr.add_suppression("Slave worker thread retried transaction 10 time\\(s\\) in vain, giving up");
CALL mtr.add_suppression("Slave: Deadlock found when trying to get lock; try restarting transaction");
SET sql_log_bin=1;
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_infinite_temp_err_gtid_0_x_100";
START SLAVE;
include/wait_for_slave_sql_error.inc [errno=1213]
SET GLOBAL debug_dbug=@old_dbug;
retries
10
SELECT * FROM t1 ORDER BY a;
a b
1 3
2 1
3 1
4 1
5 1
6 1
STOP SLAVE IO_THREAD;
include/start_slave.inc
SELECT * FROM t1 ORDER BY a;
a b
1 4
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc

85
mysql-test/suite/rpl/t/rpl_parallel_retry.test
View File

@ -47,27 +47,22 @@ CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
END
||
--delimiter ;
SET sql_log_bin=1;
--source include/stop_slave.inc
--connection server_1
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
SET gtid_seq_no = 100;
BEGIN;
INSERT INTO t1 VALUES (2,1);
UPDATE t1 SET b=b+1 WHERE a=1;
#INSERT INTO t1 VALUES (3,foo(1,
# "ha_write_row_end SIGNAL q1_ready WAIT_FOR q1_cont",
# ""));
INSERT INTO t1 VALUES (3,1);
COMMIT;
SET binlog_format=@old_format;
SELECT * FROM t1 ORDER BY a;
--save_master_pos
--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_1_100";
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
@ -79,6 +74,82 @@ eval SELECT $new_retry - $old_retry AS retries;
SELECT * FROM t1 ORDER BY a;
--echo *** Test that double retry works when the first retry also fails with temp error ***
--source include/stop_slave.inc
--connection server_1
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 10;
BEGIN;
INSERT INTO t1 VALUES (4,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (5,1);
INSERT INTO t1 VALUES (6,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
--save_master_pos
--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_double_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log
SELECT * FROM t1 ORDER BY a;
--echo *** Test too many retries, eventually causing failure. ***
--source include/stop_slave.inc
--connection server_1
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 11;
BEGIN;
INSERT INTO t1 VALUES (7,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (8,1);
INSERT INTO t1 VALUES (9,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
--save_master_pos
--connection server_2
SET sql_log_bin=0;
CALL mtr.add_suppression("Slave worker thread retried transaction 10 time\\(s\\) in vain, giving up");
CALL mtr.add_suppression("Slave: Deadlock found when trying to get lock; try restarting transaction");
SET sql_log_bin=1;
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_infinite_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
START SLAVE;
--let $slave_sql_errno= 1213
--let $slave_timeout= 10
--source include/wait_for_slave_sql_error.inc
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log
SELECT * FROM t1 ORDER BY a;
STOP SLAVE IO_THREAD;
--source include/start_slave.inc
--sync_with_master
SELECT * FROM t1 ORDER BY a;
--connection server_2
--source include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;

69
sql/rpl_parallel.cc
View File

@ -188,6 +188,22 @@ unlock_or_exit_cond(THD *thd, mysql_mutex_t *lock, bool *did_enter_cond,
}
#ifndef DBUG_OFF
static int
dbug_simulate_tmp_error(rpl_group_info *rgi, THD *thd)
{
if (rgi->current_gtid.domain_id == 0 && rgi->current_gtid.seq_no == 100 &&
rgi->retry_event_count == 4)
{
thd->clear_error();
thd->get_stmt_da()->reset_diagnostics_area();
my_error(ER_LOCK_DEADLOCK, MYF(0));
return 1;
}
return 0;
}
#endif
static int
retry_handle_relay_log_rotate(Log_event *ev, IO_CACHE *rlog)
{
@ -204,15 +220,18 @@ retry_event_group(rpl_group_info *rgi, rpl_parallel_thread *rpt,
File fd;
const char *errmsg= NULL;
inuse_relaylog *ir= rgi->relay_log;
uint64 event_count= 0;
uint64 event_count;
uint64 events_to_execute= rgi->retry_event_count;
Relay_log_info *rli= rgi->rli;
int err= 0;
int err;
ulonglong cur_offset, old_offset;
char log_name[FN_REFLEN];
THD *thd= rgi->thd;
ulong retries= 0;
do_retry:
event_count= 0;
err= 0;
rgi->cleanup_context(thd, 1);
mysql_mutex_lock(&rli->data_lock);
@ -268,10 +287,26 @@ do_retry:
else
err= retry_handle_relay_log_rotate(ev, &rlog);
delete_or_keep_event_post_apply(rgi, event_type, ev);
DBUG_EXECUTE_IF("rpl_parallel_simulate_double_temp_err_gtid_0_x_100",
if (retries == 0) err= dbug_simulate_tmp_error(rgi, thd););
DBUG_EXECUTE_IF("rpl_parallel_simulate_infinite_temp_err_gtid_0_x_100",
err= dbug_simulate_tmp_error(rgi, thd););
if (err)
{
/* ToDo: Need to here also handle second retry. */
if (has_temporary_error(thd))
{
++retries;
if (retries < slave_trans_retries)
{
end_io_cache(&rlog);
mysql_file_close(fd, MYF(MY_WME));
goto do_retry;
}
sql_print_error("Slave worker thread retried transaction %lu time(s) "
"in vain, giving up. Consider raising the value of "
"the slave_transaction_retries variable.",
slave_trans_retries);
}
goto err;
}
@ -592,29 +627,23 @@ handle_rpl_parallel_thread(void *arg)
{
++rgi->retry_event_count;
err= rpt_handle_event(events, rpt);
DBUG_EXECUTE_IF("rpl_parallel_simulate_temp_err_gtid_0_1_100",
if (rgi->current_gtid.domain_id == 0 &&
rgi->current_gtid.server_id == 1 &&
rgi->current_gtid.seq_no == 100 &&
rgi->retry_event_count == 4)
{
thd->clear_error();
thd->get_stmt_da()->reset_diagnostics_area();
my_error(ER_LOCK_DEADLOCK, MYF(0));
err= 1;
};);
delete_or_keep_event_post_apply(rgi, event_type, events->ev);
DBUG_EXECUTE_IF("rpl_parallel_simulate_temp_err_gtid_0_x_100",
err= dbug_simulate_tmp_error(rgi, thd););
if (err && has_temporary_error(thd))
err= retry_event_group(rgi, rpt, events);
}
else
{
delete events->ev;
err= thd->wait_for_prior_commit();
}
end_of_group=
in_event_group &&
((group_standalone && !Log_event::is_part_of_group(event_type)) ||
group_ending);
delete_or_keep_event_post_apply(rgi, event_type, events->ev);
events->next= qevs_to_free;
qevs_to_free= events;
@ -1527,16 +1556,10 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
}
if (typ == GTID_EVENT)
{
uint32 domain_id;
if (likely(typ == GTID_EVENT))
{
Gtid_log_event *gtid_ev= static_cast<Gtid_log_event *>(ev);
domain_id= (rli->mi->using_gtid == Master_info::USE_GTID_NO ?
uint32 domain_id= (rli->mi->using_gtid == Master_info::USE_GTID_NO ?
0 : gtid_ev->domain_id);
}
else
domain_id= 0;
if (!(e= find(domain_id)))
{
my_error(ER_OUT_OF_RESOURCES, MYF(MY_WME));