Negative Blocking Session Ids (-5 = Latch ANY TASK RELEASOR)

SQL Server may report a blocking session id as a negative integer value. SQL Server uses negative sessions ids to indicate special conditions.​​ 




Orphaned lock,​​ commonly​​ a bug in SQL Server​​ where lock ownership has been incorrectly​​ lost.



Pending DTC​​ transaction. ​​ The client connection(s) associated with the DTC transaction have disconnected and the SQL Server DTC transaction object is waiting for the MSDTC Manager,​​ state change​​ notification. ​​ The client application​​ needs to invoke​​ commit or rollback​​ on the transaction interface to complete the DTC transaction.



Deferred recovery. ​​ The