7d813667c3
* Move MediaTree write lock before MediaSavingNotification to prevent deadlock Fixes a deadlock that could occur when saving multiple media items in parallel when a MediaSavingNotification handler acquires a MediaTree read lock. The previous ordering allowed two threads to each acquire read locks in their notification handlers, then both attempt to upgrade to write locks, causing a classic lock upgrade deadlock in SQL Server. By acquiring the write lock before publishing the notification, the deadlock scenario is avoided. Since the write lock is lazy, it only materializes at the database level when actual queries are made, so notification handlers doing in-memory work won't hold the lock. * Apply same fix to MediaService.Delete method * Apply same fix to DeleteVersions, DeleteVersion, and Sort methods * Apply same fix to ContentService methods Move WriteLock before notifications in: - Save (single and batch) - Delete - DeleteVersions - DeleteVersion - Copy * Apply the same pattern to MemberService. * Add integration tests to verify the fix. --------- Co-authored-by: Andy Butland <abutland73@gmail.com>
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