Question

I have a table called MyTable on which I have defined a trigger, like so:

CREATE TRIGGER dbo.trg_Ins_MyTable
   ON  dbo.MyTable 
   FOR INSERT
AS 
BEGIN
    SET NOCOUNT ON;

    insert SomeLinkedSrv.Catalog.dbo.OtherTable 
        (MyTableId, IsProcessing, ModifiedOn)
    values (-1, 0, GETUTCDATE())
END
GO

Whenever I try to insert a row in MyTable, I get this error message:

Msg 3910, Level 16, State 2, Line 1
Transaction context in use by another session.

I have SomeLinkedSrv properly defined as a linked server (for example, select * from SomeLinkedSrv.Catalog.dbo.OtherTable works just fine).

How can I avoid the error and successfully insert record+execute the trigger?

Answer 1

Loopback linked servers can’t be used in a distributed transaction if MARS is enabled.

Loopback linked servers cannot be used in a distributed transaction.
Trying a distributed query against a loopback linked server from
within a distributed transaction causes an error, such as error 3910:
“[Microsoft][ODBC SQL Server Driver][SQL Server]Transaction context in
use by another session.” This restriction does not apply when an
INSERT…EXECUTE statement, issued by a connection that does not have
multiple active result sets (MARS) enabled, executes against a
loopback linked server. Note that the restriction still applies when
MARS is enabled on a connection.

http://msdn.microsoft.com/en-us/library/ms188716(SQL.105).aspx