• unsafe assembly message in the sql server log

    From Erland Sommarskog@21:1/5 to M.G. on Sat Sep 10 11:37:17 2016
    M.G. (michael@gurfinkel.us) writes:
    We started getting messages like this one:

    2016-09-08 08:00:54.18 spid91 Unsafe assembly 'microsoft.sqlserver.mpusqlclrwrapper, version=,
    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

    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?

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

    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, esquel@sommarskog.se

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