Type:
Priority:
Resolution:
Unresolved
There's potential deadlock between "thread killing another thread that has open InnoDB HANDLER or delayed insert thread performing insert into InnoDB table" and "InnoDB service threads like srv_monitor_thread that calls thd_get_error_context_description".
I doubt MariaDB is affected, because it does try_lock in thd_get_error_context_description, see 6e9a48b67fceab17089ca4cd1406e302386a601b.
But anyway, since InnoDB doesn't use thr_lock anymore, it is probably a good idea to get rid of ha_innobase::store_lock() by moving some code to external_lock. Note: compared to store_lock external_lock can be called for temporary tables too.
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Task
Major
MDEV-12070 Introduce thd_query_safe() from MySQL 5.7
