Parallel ForEach Iteration for Execute Pipeline activity - azure-data-factory-2

Question

I want to execute a pipeline in parallel via ForEach Activity.
Below is the sample code for parent and child pipeline.
{
"name": "Parent",
"properties": {
"activities": [
{
"name": "ForEach1",
"type": "ForEach",
"dependsOn": [],
"userProperties": [],
"typeProperties": {
"items": {
"value": "#pipeline().parameters.Test",
"type": "Expression"
},
"isSequential": false,
"activities": [
{
"name": "Execute Pipeline1",
"type": "ExecutePipeline",
"dependsOn": [],
"userProperties": [],
"typeProperties": {
"pipeline": {
"referenceName": "Child",
"type": "PipelineReference"
},
"waitOnCompletion": true
}
}
]
}
}
],
"concurrency": 10,
"parameters": {
"Test": {
"type": "array",
"defaultValue": [
1,
2
]
}
},
"annotations": []
}
}
{
"name": "Child",
"properties": {
"activities": [
{
"name": "Wait1",
"type": "Wait",
"dependsOn": [],
"userProperties": [],
"typeProperties": {
"waitTimeInSeconds": 120
}
}
],
"concurrency": 10,
"annotations": []
}
}
After executing the pipeline, ForEach iteration is executing sequentially rather than parallelly therein executing child pipeline sequentially.
Is there any configuration changes that i am missing out which is causing child pipeline to run sequentially.

Answer 1

My assumption is you are executing the pipeline in debug mode :
Because the same code I executed via trigger, it was as expected wherein the execute pipeline was in parallel
Note: The updated the parameter to 7 iterations hence you are able to see more child pipelines