Type:
Priority:
Resolution:
Fixed
Affects Version/s:
None
Fix Version/s:
None
Component/s:
None
(Initially found by Elena)
I'll attach a testcase, which eventually gets three threads to be stuck in "Waiting for table level lock" state.
The testcase must be run like this: ./mysql-test-run t/t45.test --repeat=100 (can also add --testcase-timeout=600 to ease debugging). Execution will get stuck after a minute. On my machine (pylon-fedora15), only release build gets stuck, and only when the server is started by MTR.
Being stuck looks like this:
+----+------+-----------------+------+---------+------+------------------------------+------------------------------------------------+----------+
| Id | User | Host | db | Command | Time | State | Info | Progress |
+----+------+-----------------+------+---------+------+------------------------------+------------------------------------------------+----------+
| 23 | root | localhost | test | Sleep | 17 | | NULL | 0.000 |
| 24 | root | localhost | test | Query | 17 | Waiting for table level lock | ANALYZE TABLE E | 0.000 |
| 25 | root | localhost | test | Query | 17 | Waiting for table level lock | ANALYZE TABLE A | 0.000 |
| 26 | root | localhost | test | Query | 17 | Waiting for table level lock | SELECT * FROM mysql.index_stat, test.E LIMIT 1 | 0.000 |
| 27 | root | localhost:52086 | NULL | Query | 0 | NULL | show processlist | 0.000 |
+----+------+-----------------+------+---------+------+------------------------------+------------------------------------------------+----------+
t45.test 2012-11-28 14:34 65 kB Sergei Petrunia threads45 2012-11-28 14:34 17 kB Sergei Petrunia
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Bug
Major
MDEV-3806 Engine independent statistics