System.Transactions source warnings when using Linq-2-Sql

Question

I've enabled System.Transactions logging:

<system.diagnostics>
    <sources>
        <source name="System.Transactions" switchValue="Warning">
            -- my listeners here
        </source>
    </sources>
</system.diagnostics>

and see A LOT of strange log warnings like:

• Transaction.Rollback Called
• Enlistment Callback Negative
• TransactionScope Incomplete

Can please somebody shed some light on it? My system works as expected and there are no ADO.NET level exceptions raised. The DAL code is typical L2S code without explicit transaction management or any hacks.

Answer 1

Using a switchValue of Warning will pickup more than just errors. From msdn:

A condition exists that can subsequently result in an error or critical failure (for example, allocation failing or approaching a limit). Normal processing of errors from user code (for example, transaction aborted, timeouts, authentication failed) can also generate a warning.

Maybe this is what you want. If so, cool. Otherwise, you may want to change it to Error.