Release Lock on variables used in Execute Process Task | SSIS

问题

I have a package with a Foreach Container and Execute Process Task inside ForEach Container . On some error in Execute Process Task it redirects to OnError Event handler of ForEach Container.

I am capturing the Error from .exe using StandardErrorvariable property of the Task and using this in the script task which is present in OnError Event Handler.

The Script Task fails saying

Error: A deadlock was detected while trying to lock variable "User::ErrorExcelName, User::ErrorFolder, User::ErrorMessage, User::FileName" for read access. A lock could not be acquired after 16 attempts and timed out.

How to fix this ?

回答1:

You can easily resolve the problem by managing the variable locking explicitly in code. (Not adding variables to ReadOnlyVariables and ReadWriteVariables properties.

string strFilename;
Variables lockedVariables = null;
Dts.VariableDispenser.LockOneForRead("FileName", ref lockedVariables);
strFilename = lockedVariables["FileName"].Value;
lockedVariables.Unlock();

References

• http://www.sqlis.com/sqlis/post/A-deadlock-was-detected-while-trying-to-lock-variables-in-SSIS.aspx
• http://sqlblogcasts.com/blogs/mohitnayyar/archive/2007/09/23/update-ssis-deadlock-was-detected-while-trying-to-lock-variables-mohit-nayyar.aspx

来源：https://stackoverflow.com/questions/44453384/release-lock-on-variables-used-in-execute-process-task-ssis