Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Duplicate
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10.5, 10.6, 10.9(EOL), 10.10(EOL), 10.11, 11.0(EOL), 11.1(EOL)
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:
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10.9.0 5be92887c2caacb45af87b1131db952ce627e83a (Debug) |
10.9.0-dbg>INSTALL PLUGIN spider SONAME 'ha_spider.so';
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Query OK, 0 rows affected, 1 warning (0.028 sec)
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10.9.0-dbg>DROP TABLE IF EXISTS mysql.spider_tables;
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<CLI Thread Hang>
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Using CLI in another session shows the issue;
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10.9.0 5be92887c2caacb45af87b1131db952ce627e83a (Debug) |
10.9.0-dbg>show processlist;
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+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
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| 4 | root | localhost | test | Query | 1344 | closing tables | DROP TABLE IF EXISTS mysql.spider_tables | 0.000 |
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| 5 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 6 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 7 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 8 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 9 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 10 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 12 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 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 |
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| 17 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 11 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 15 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 16 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 18 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 22 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 21 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 19 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 14 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 23 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 20 | system user | | NULL | Daemon | NULL | Spider table background statistics action handler | NULL | 0.000 |
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| 24 | system user | | NULL | Daemon | NULL | Spider table background cardinality action handler | NULL | 0.000 |
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| 25 | root | localhost | test | Query | 0 | starting | show processlist | 0.000 |
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+----+-------------+-----------+------+---------+------+----------------------------------------------------+------------------------------------------------------------------------------------------------------+----------+
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22 rows in set (0.000 sec)
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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
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- Closed
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- relates to
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- Closed
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