topic Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty in Pipelines

Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

pellitteris — Thu, 17 Oct 2024 08:49:40 GMT

The system variables of the pipelines called by an "Invoke Pipeline (Preview)" action are not populated correctly or at least they are not as populated as those called by "Invoke Pipeline (Legacy)".

In particular the following variables are not populated:

pipeline().TriggeredByPipeline
pipeline().TriggeredByPipelineName
pipeline().TriggeredByPipelineRunId

Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

Expiscornovus — Thu, 17 Oct 2024 10:06:37 GMT

Hi pellitteris,

Just to double check, can you share how you tested this?

I tried to reproduce this with a set variable activity and I was also getting a null value back in the outputs of that variable activity.

I used the below expression in a Pipeline return value variable type.

@pipeline()?.TriggeredByPipelineRunId

The set variable activity output

The invoke pipeline (preview) activity output

Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

pellitteris — Thu, 17 Oct 2024 10:42:00 GMT

Hi Expiscornovus,

I created two pipelines, a caller and a worker. The caller pipeline calls the worker pipeline using the "Invoke Pipeline (Preview)" activity. Inside the worker pipeline I read the values of the system variables by setting some variables. In this case the variables are always null. If instead I use the "Invoke Pipeline (Legacy)" activity the variables are always populated.

Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

Anonymous — Fri, 18 Oct 2024 02:06:26 GMT

Hi pellitteris ,

I made a similar maneuver to the query you raised.

I think you need to write @pipeline. firstly. After this, it will give you what you want.

Best Regards

Yilong Zhou

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

pellitteris — Fri, 18 Oct 2024 13:51:33 GMT

sorry Anonymous, the problem is not that I don't know or can't find the variable, the problem is that the runtime value of the system variables @pipeline()?.TriggeredByPipeline* is null using the new "Invoke Pipeline" activity.

Re: Invoked pipeline triggered by "Invoke Pipeline (Preview)" has TriggeredBy* system variables empty

JasperFiv — Tue, 06 Jan 2026 13:03:30 GMT

Has there been any update on this? I'm having the same issue.