unsafe assembly message in the sql server log

[M.G.]

We started getting messages like this one:

2016-09-08 08:00:54.18 spid91 Unsafe assembly 'microsoft.sqlserver.mpusqlclrwrapper, version=10.0.0.0, culture=neutral, publickeytoken=89845dcd8080cc91, processorarchitecture=msil' loaded into appdomain 215 (mssqlsystemresource.dbo[runtime].285).

in the server log (MS SQL 2008 R2)

I don't know much about assemblies and the message worries me.

My understanding is that assembly usually is a procedure written in CLR language, such as C#, compiled and deployed as native code on SQL Server.

There is no s/w that we build and deploy as such assembly - what could be a reason for the warning message? Are there any steps to further investigate it?

[Erland Sommarskog]

Note that this assembly comes from the mssqlsystemresource database, that
is the system database that inlcudes all system procedures, catalog views
etc.

I don't know about the mpusqlclrwrapper, and the documentation I find on
https://msdn.microsoft.com/en-us/library/microsoft.sqlserver.management.shared.mpusql.mpusqlclrwrapper.aspx
isn't that detailed. However MPU = Multi-Processor Unit or some such.
This is related to what now is known as the Parallel Data Warehouse and
which first appeared in the SQL 2008 R2 timeframe. Since that is a
specialised version of SQL Server, it is not appearent why it would be
loaded on a plain-vanilla instance.



--
Erland Sommarskog, Stockholm, esq...@sommarskog.se