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0a68328673
This is actually an existing problem in the old binlog implementation, and this patch is applicable to old binlog also. The problem is that RESET MASTER can run concurrently with binlog dump threads / connected slaves. This will remove the binlog from under the feet of the reader, which can cause all sorts of strange behaviour. This patch fixes the problem by disallowing to run RESET MASTER when dump threads (or other RESET MASTER or SHOW BINARY LOGS) are running. An error is thrown in this case, user must stop slaves and/or kill dump threads to make the RESET MASTER go through. A slave that connects in the middle of RESET MASTER will wait for it to complete. Fix a lot of test cases to kill any lingering dump threads before doing RESET MASTER, mostly just by sourcing include/kill_binlog_dump_threads.inc. Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
85 lines
2.2 KiB
Text
85 lines
2.2 KiB
Text
include/master-slave.inc
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[connection master]
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CALL mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT");
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create table t1 (word char(20) not null);
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load data infile '../../std_data/words.dat' into table t1;
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load data local infile 'MYSQL_TEST_DIR/std_data/words.dat' into table t1;
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select * from t1 limit 10;
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word
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Aarhus
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Aaron
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Ababa
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aback
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abaft
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abandon
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abandoned
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abandoning
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abandonment
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abandons
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connection slave;
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stop slave;
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connection master;
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create temporary table tmp select * from mysql.global_priv where host="localhost" and user="root";
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set password for root@"localhost" = password('foo');
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connection slave;
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start slave;
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connection master;
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replace into mysql.global_priv select * from tmp;
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Warnings:
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Note 1592 Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. REPLACE... SELECT is unsafe because the order in which rows are retrieved by the SELECT determines which (if any) rows are replaced. This order cannot be predicted and may differ on master and the slave
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drop temporary table tmp;
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flush privileges;
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create table t3(n int);
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insert into t3 values(1),(2);
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connection slave;
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select * from t3;
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n
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1
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2
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select sum(length(word)) from t1;
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sum(length(word))
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1022
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connection master;
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drop table t1,t3;
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connection slave;
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connection master;
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create table t1 (n int);
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connection slave;
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stop slave;
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connection master;
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include/kill_binlog_dump_threads.inc
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reset master;
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connection slave;
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include/reset_slave.inc
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connection master;
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connection slave;
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lock tables t1 read;
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start slave;
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connection master;
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include/sync_slave_io_with_master.inc
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unlock tables;
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connection master;
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create table t2(id int);
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insert into t2 values(connection_id());
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connection master1;
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create temporary table t3(n int);
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insert into t3 select get_lock('crash_lock%20C', 1) from t2;
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connection master;
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update t1 set n = n + get_lock('crash_lock%20C', 2);
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connection master1;
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select (@id := id) - id from t2;
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(@id := id) - id
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0
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kill @id;
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drop table t2;
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drop temporary table t3;
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connection master;
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Got one of the listed errors
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connection slave;
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include/wait_for_slave_sql_error_and_skip.inc [errno=1927]
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select count(*) from t1;
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count(*)
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5000
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connection master1;
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drop table t1;
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include/rpl_end.inc
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