Deadlock in DYN subsystem (superserver) [CORE1788] #2214
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Modified by: @alexpotapchenkosecurity: Developers [ 10012 ] => |
Modified by: @dyemanovVersion: 2.5 Initial [ 10260 ] assignee: Dmitry Yemanov [ dimitr ] Version: 2.5 Alpha 1 [ 10224 ] => |
Modified by: @dyemanovstatus: Open [ 1 ] => Resolved [ 5 ] resolution: Fixed [ 1 ] Fix Version: 2.5 Alpha 1 [ 10224 ] |
Modified by: @pcisarstatus: Resolved [ 5 ] => Closed [ 6 ] |
Modified by: @pavel-zotovQA Status: No test |
Modified by: @pavel-zotovstatus: Closed [ 6 ] => Closed [ 6 ] QA Status: No test => Cannot be tested |
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Submitted by: @alexpotapchenko
Relate to CORE2184
There is potential deadlock by using Create/Alter/Delete user statements.
Database::Checkout dcoHolder(dbb) in dyn_user function releases lock on dbb_sync, at this time we hold dbb_mutexes[DBB_MUTX_dyn]. Another thread can get lock on dbb_sync in GDS_DDL and it will try to get lock on dbb_mutexes[DBB_MUTX_dyn]. In that case deadlock is occur.
Commits: ebad313
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