Using Invoke-SqlCmd in ForEach-Object -Parallel loop - not threadsafe?

[jplee75]

It appears that Invoke-SqlCmd is not threadsafe - is this correct? Can it be made to be so?

Got this error while executing in a ForEach-Object -Parallel type loop

Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
##[error]PowerShell exited with code '1'.

Version Info
Name Value

---

PSVersion 7.4.0
PSEdition Core
GitCommitId 7.4.0
OS Ubuntu 22.04.3 LTS
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

Name : SqlServer
Path : /home/vsts/.local/share/powershell/Modules/SqlServer/22.1.1
/SqlServer.psd1
Version : 22.1.1

[jplee75]

I know I posted this over the end of the year - is there more information I could provide to be helpful or possible to get an answer if Invoke-SqlCmd should be safe or not to use with For-Each Object -Parallel ?

[Matteo-T]

Hi @jplee75 - I believe you are correct and this is a fairly old issue (it predates having this repo where we collect the issues).

For now and until I can take a look and fix it, I would recomment to stay away from it.

[ZianAtFirstWatch]

I'm able to reproduce the issue with version 22.2.0 of the SQLServer module on PowerShell version 7.4.2 and Microsoft Windows 10.0.19045.