1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connection con1;
--disable_warnings
drop table if exists t1,t2;
drop database if exists mysqltest;
--enable_warnings
create temporary table t1(n int not null primary key);
create table t2(n int);
insert into t2 values(3);
let $1=100;
disable_query_log;
while ($1)
{
connection con1;
send replace into t1 select n from t2;
connection con2;
send flush tables;
connection con1;
reap;
connection con2;
reap;
dec $1;
}
enable_query_log;
connection con1;
select * from t1;
connection con2;
flush tables with read lock;
--error 1223
drop table t2;
connection con1;
send drop table t2;
connection con2;
unlock tables;
connection con1;
reap;
#test if drop database will wait until we release the global read lock
connection con1;
create database mysqltest;
create table mysqltest.t1(n int);
insert into mysqltest.t1 values (23);
flush tables with read lock;
connection con2;
send drop database mysqltest;
connection con1;
select * from mysqltest.t1;
unlock tables;
connection con2;
reap;
# test if dirty close releases global read lock
connection con1;
create table t1 (n int);
flush tables with read lock;
dirty_close con1;
connection con2;
insert into t1 values (345);
select * from t1;
drop table t1;
#
# Bug#9459 - deadlock with flush with lock, and lock table write
#
create table t1 (c1 int);
lock table t1 write;
# Cannot get the global read lock with write locked tables.
--error 1192
flush tables with read lock;
lock table t1 read;
# Can get the global read lock with read locked tables.
flush tables with read lock;
--error 1223
lock table t1 write;
lock table t1 read;
--error 1223
lock table t1 write;
# Release all table locks and the global read lock.
unlock tables;
create table t2 (c1 int);
create table t3 (c1 int);
lock table t1 read, t2 read, t3 write;
# Cannot get the global read lock with write locked tables.
--error 1192
flush tables with read lock;
lock table t1 read, t2 read, t3 read;
# Can get the global read lock with read locked tables.
flush tables with read lock;
# Release all table locks and the global read lock.
unlock tables;
drop table t1, t2, t3;
# End of 4.1 tests
#
# Test of deadlock problem when doing FLUSH TABLE with read lock
# (Bug was in NTPL threads in Linux when using different mutex while
# waiting for a condtion variable)
create table t1 (c1 int);
create table t2 (c1 int);
connect (con1,localhost,root,,);
connect (con3,localhost,root,,);
connection con1;
lock table t1 write;
connection con2;
send flush tables with read lock;
--sleep 1
connection con3;
send insert into t2 values(1);
--sleep 1
connection con1;
unlock tables;
disconnect con1;
connection con2;
reap;
disconnect con2;
connection con3;
# It hangs here (insert into t2 does not end).
reap;
disconnect con3;
connection default;
drop table t1, t2;
#
# Bug#32528 Global read lock with a low priority write lock causes a server crash
#
--disable_warnings
drop table if exists t1, t2;
--enable_warnings
set session low_priority_updates=1;
create table t1 (a int);
create table t2 (b int);
lock tables t1 write;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
flush tables with read lock;
unlock tables;
lock tables t1 read, t2 write;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
flush tables with read lock;
unlock tables;
lock tables t1 read;
flush tables with read lock;
unlock tables;
drop table t1, t2;
set session low_priority_updates=default;
#
# Bug #33334 mysqltest_embedded crashes when disconnecting before reap
#
connect (con1,localhost,root,,);
send select benchmark(200, (select sin(1))) > 1000;
disconnect con1;
--source include/wait_until_disconnected.inc
connection default;
--echo End of 5.0 tests
#
# Bug #26380: LOCK TABLES + FLUSH LOGS causes deadlock
#
set @old_general_log= @@general_log;
set @old_read_only= @@read_only;
set global general_log= on;
flush tables with read lock;
flush logs;
unlock tables;
set global read_only=1;
flush logs;
unlock tables;
flush tables with read lock;
flush logs;
unlock tables;
set global general_log= @old_general_log;
set global read_only= @old_read_only;
--echo End of 5.1 tests
|