Thanks, That returned me the following results. From the start time this seems like this process's been running for over 3 days.
Oldest active transaction:
SPID (server process ID): 58
UID (user ID) : -1
Name : user_transaction
LSN : (473273:176905:59)
Start time : Nov 24 2013 11:31:44:010PM
SID : 0xb6e2b7cea93af54eb49780a9ff6d2b0b
Yup, that looks like a suspect.
Query sys.dm_exec_sessions and sys.dm_exec_connections and see where session_id 58 is coming from, which login, what machine, what application. USe the most_recent_sql_handle column of sys.dm_exec_connections along with the sys.dm_exec_sql_text function to see the last thing it ran. That combined should give you a good idea of where this open transaction is coming from.
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