Details
-
Bug
-
Status: Closed (View Workflow)
-
Major
-
Resolution: Duplicate
-
10.5, 10.6, 10.9, 10.10, 10.11, 11.0, 11.1
Description
Scenario: simply execute the following SQL in some automated fashion (copy/paste into CLI for example):
INSTALL PLUGIN spider SONAME 'ha_spider.so'; |
DROP TABLE IF EXISTS mysql.spider_tables; |
In some instances (timing dependent), this will result in:
|
10.9.0 5be92887c2caacb45af87b1131db952ce627e83a (Debug) |
10.9.0-dbg>INSTALL PLUGIN spider SONAME 'ha_spider.so';
|
Query OK, 0 rows affected, 1 warning (0.028 sec)
|
 |
10.9.0-dbg>DROP TABLE IF EXISTS mysql.spider_tables;
|
<CLI Thread Hang>
|
Using CLI in another session shows the issue;
|
10.9.0 5be92887c2caacb45af87b1131db952ce627e83a (Debug) |
10.9.0-dbg>show processlist;
|
+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
|
| Id | User | Host | db | Command | Time | State | Info | Progress |
|
+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
|
| 4 | root | localhost | test | Query | 1344 | closing tables | DROP TABLE IF EXISTS mysql.spider_tables | 0.000 |
|
| 5 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 6 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 7 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 8 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 9 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 10 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 12 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 13 | system user | | NULL | Query | 1344 | Waiting for table metadata lock | create table if not exists mysql.spider_tables( db_name char(64) not null default '', table_name c | 0.000 |
|
| 17 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 11 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 15 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 16 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 18 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 22 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 21 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 19 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 14 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 23 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 20 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
|
| 24 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
|
| 25 | root | localhost | test | Query | 0 | starting | show processlist | 0.000 |
|
+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
|
22 rows in set (0.000 sec)
|
i.e. mysql.spider_table is still being created, even though the INSTALL PLUGIN had already returned as completed/finished.
Fix proposal: do not return as "query complete/finished" until any necessary table creations are finished.
Likely present in 10.4+. Discovered in 10.9
Attachments
Issue Links
- is blocked by
-
-
- Closed
-
- relates to
-
-
- Closed
-