Complement to

ChangeSet 1.1616.23.1
Fix for BUG#1858 "SQL-Thread stops working when using optimize table".
A test for this.

mysql-test/r/rpl_optimize.result

+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 not null auto_increment primary key, b int, key(b));
+INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+update t1 set b=(a/2*rand());
+delete from t1 order by b limit 10000;
+optimize table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	status	OK
+drop table t1;

mysql-test/t/rpl_optimize.test

+# Test for BUG#1858 "OPTIMIZE TABLE done by a client
+# thread stops the slave SQL thread".
+# You can replace OPTIMIZE by REPAIR.
+
+source include/master-slave.inc;
+
+create table t1 (a int not null auto_increment primary key, b int, key(b));
+INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+INSERT INTO t1 (a) SELECT null FROM t1;
+save_master_pos;
+# a few updates to force OPTIMIZE to do something
+update t1 set b=(a/2*rand());
+delete from t1 order by b limit 10000;
+
+connection slave;
+sync_with_master;
+optimize table t1;
+connection master;
+save_master_pos;
+connection slave;
+# Bug was that when the INSERT terminated on slave,
+# the slave SQL thread got killed by OPTIMIZE.
+sync_with_master; # won't work if slave SQL thread stopped
+
+connection master; # cleanup
+drop table t1;
+connection slave;
+sync_with_master;
+
+# If the machine is so fast that slave syncs before OPTIMIZE
+# starts, this test wil demonstrate nothing but will pass.

sql/sql_base.cc

@@ -2364,7 +2364,8 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
       if (table->db_stat)
 	result=1;
       /* Kill delayed insert threads */
-      if (in_use->system_thread && ! in_use->killed)
+      if ((in_use->system_thread & SYSTEM_THREAD_DELAYED_INSERT) &&
+          ! in_use->killed)
       {
 	in_use->killed=1;
 	pthread_mutex_lock(&in_use->mysys_var->mutex);