一工厂的SQL Server数据库服务器上的YourSQLDba_LogBackups作业做事务日志备份时，突然出现异常，异常的错误信息指向.NET Framework，出现这个问题时，一般我估计是该服务器自动应用了.NET Framework的一些补丁导致，因为以前也碰到过这类错误，于是去检查服务器，发现确实如此，具体请见下面截图

<Step>

<ctx>yMaint.backups</ctx>

<err>err :6522 A .NET Framework error occurred during execution of user-defined routine or aggregate "Clr_ExecAndLogAllMsgs":

System.BadImageFormatException: Bad IL range.

System.BadImageFormatException:

at System.Data.SqlServer.Internal.XvarWlobStream.GetSqlChars()

.  In procedure Clr_ExecAndLogAllMsgs: at line 0</err>

</Step>

一般引起.NET Framework 6522的错误可能有下面一下原因：

·         Corrupt download or incomplete installation of .NET Framework software.

·         Corruption in Windows registry from a recent .NET Framework-related software change (install or uninstall).

·         Virus or malware infection that has corrupted Windows system files or .NET Framework-related program files.

·         Another program maliciously or mistakenly deleted .NET Framework-related files.

其实从上面截图看，是因为在自动应用补丁时，没有安装完成，需要重启服务器完成安装更新。Windows Update也提示要求重启完成更新。所以造成了YourSQLDba那边一些程序集异常，出现错误信息。