Details
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Bug
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Status: Confirmed (View Workflow)
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Major
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Resolution: Unresolved
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10.2.8
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None
Description
On concurent insert maybe (3 ~ 4) I got global read lock, look like because spider may consider MyRocksDB like non transactional engine.
+-----------+-------------------------+---------------+---------------------+--------------+-------------------------+
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| THREAD_ID | LOCK_MODE | LOCK_DURATION | LOCK_TYPE | TABLE_SCHEMA | TABLE_NAME |
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+-----------+-------------------------+---------------+---------------------+--------------+-------------------------+
|
| 6828 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6831 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6848 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6847 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6869 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6870 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6885 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6895 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6886 | MDL_INTENTION_EXCLUSIVE | NULL | Global read lock | | | |
| 6895 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_int__25 | |
| 6885 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_int | |
| 3693 | MDL_SHARED_HIGH_PRIO | NULL | Table metadata lock | pmacontrol | status_value_double__18 | |
| 6828 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6831 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6848 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6847 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6869 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6870 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
| 6886 | MDL_SHARED_WRITE | NULL | Table metadata lock | pmacontrol | status_value_double | |
+-----------+-------------------------+---------------+---------------------+--------------+-------------------------+
|
on processlist we can see : (the oldest transaction)
show table status from `pmacontrol` like 'status_value_double__18'; |
Nothing about a lock in RocksDB (tried to see TokuDB and InnoDB too)
One sting strange I can execute this query without problem :
show table status from `pmacontrol` like 'status_value_double__18'; |
but not a select on table : status_value_double__18
in same time i saw on error log :
sept. 21 16:04:51 aurelien-rdc mysqld[20310]: 2017-09-21 16:04:51 140320728037568 [Note] /usr/sbin/mysqld (mysqld 10.2.8-MariaDB-10.2.8+maria~xenial) starting as process 20310 … |
sept. 21 16:04:51 aurelien-rdc mysqld[20310]: 2017-09-21 16:04:51 140320728037568 [ERROR] mysqld: Can't lock aria control file '/var/lib/mysql/aria_log_control' for exclusive use, error: 11. Will retry for 30 sec lines 1-18/18 (END) |
|
A ticket for Kentoku I guess =)
Attachments
Issue Links
- is duplicated by
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- Closed
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- relates to
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- Closed
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