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Fix for BUG#5949 "error code 1223 in binlog when using innobackup":

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when one connection had done FLUSH TABLES WITH READ LOCK, some updates, and then COMMIT,
it was accepted but my_error() was called and so, while client got no error, error was logged in binlog.
We now don't call my_error() in this case; we assume the connection know what it does.
This problem was specific to 4.0.21. The change is needed to make replication work with existing versions of innobackup.


sql/lock.cc:
  If a connection has done FLUSH TABLES WITH READ LOCK and now is doing COMMIT, don't give error
  (applies only if it's the same connection; others' COMMITs are still blocked).
This commit is contained in:
unknown
2004-10-11 11:01:38 +02:00
parent c868213373
commit c5f9a412ce
3 changed files with 38 additions and 2 deletions
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13
mysql-test/r/rpl_commit_after_flush.result Normal file
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@ -0,0 +1,13 @@
slave stop;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
slave start;
create table t1 (a int) type=innodb;
begin;
insert into t1 values(1);
flush tables with read lock;
commit;
unlock tables;
drop table t1;

17
mysql-test/t/rpl_commit_after_flush.test Normal file
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@ -0,0 +1,17 @@
source include/master-slave.inc;
source include/have_innodb.inc;
create table t1 (a int) type=innodb;
begin;
insert into t1 values(1);
flush tables with read lock;
commit;
save_master_pos;
connection slave;
sync_with_master;
# cleanup
connection master;
unlock tables;
drop table t1;
save_master_pos;
connection slave;
sync_with_master;

10
sql/lock.cc
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@ -751,9 +751,15 @@ bool wait_if_global_read_lock(THD *thd, bool abort_on_refresh, bool is_not_commi
{
if (thd->global_read_lock) // This thread had the read locks
{
my_error(ER_CANT_UPDATE_WITH_READLOCK,MYF(0));
if (is_not_commit)
my_error(ER_CANT_UPDATE_WITH_READLOCK,MYF(0));
(void) pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(1);
/*
We allow FLUSHer to COMMIT; we assume FLUSHer knows what it does.
This allowance is needed to not break existing versions of innobackup
which do a BEGIN; INSERT; FLUSH TABLES WITH READ LOCK; COMMIT.
*/
DBUG_RETURN(is_not_commit);
}
old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
"Waiting for release of readlock");