Azure Synapse Create Pipeline Rest API - azure

Question

I am calling Azure Synapse Pipeline Create Pipeline REST API with a Databricks Notebook JSON activity.
Error message in the Synapse Pipeline screen: Could not load resource 'PLDB2'. Please ensure no mistakes in the JSON and that referenced resources exist. Status: Cannot read properties of undefined (reading 'toLowerCase'), Possible reason: Cannot read properties of undefined (reading 'toLowerCase')
PostMan: https://mysynapseworkspace.dev.azuresynapse.net/pipelines/PLDB2?api-version=2020-12-01
Links:
https://learn.microsoft.com/en-us/rest/api/synapse/data-plane/pipeline/create-or-update-pipeline?tabs=HTTP
https://learn.microsoft.com/en-us/azure/data-factory/transform-data-databricks-notebook?context=%2Fazure%2Fsynapse-analytics%2Fcontext%2Fcontext&tabs=synapse-analytics
Create Pipeline JSON in Postman Body
{
"name": "PLDB2",
"properties": {
"description": "Databricks Notebook",
"activities": [
{
"activity": {
"name": "MyActivity",
"description": "MyActivity description",
"type": "DatabricksNotebook",
"linkedServiceName": {
"referenceName": "LS_Databricks",
"type": "LinkedServiceReference"
},
"typeProperties": {
"notebookPath": "/Users/abc#myemail.com/Test_Job_1"
}
}
}
]
}
}
Synape Pipeline item is created with above error message:
{
"id": "/subscriptions/mysubscription/resourceGroups/myresourcegroup/providers/Microsoft.Synapse/workspaces/mysynapseworkspace/pipelines/PLDB2",
"name": "PLDB2",
"type": "Microsoft.Synapse/workspaces/pipelines",
"etag": "9400d55f-0000-0100-0000-63b180e40000",
"properties": {
"description": "Databricks Notebook",
"activities": [
{
"activity": {
"name": "MyActivity",
"description": "MyActivity description",
"type": "DatabricksNotebook",
"linkedServiceName": {
"referenceName": "LS_Databricks_Personify",
"type": "LinkedServiceReference"
},
"typeProperties": {
"notebookPath": "/Users/nlaw#quaerainsights.com/Test_Job_1"
}
}
}
],
"lastPublishTime": "2023-01-01T12:47:32Z"
}
}
In Azure Synapse, I can manually create and run a pipeline calling the Databricks "Test_Job_1" notebook described in the JSON.
What is the problem? Thx for help.

Answer 1

I found the problem. In the JSON, delete these 2 lines: "activity": { and its closing bracket "}"
{
"name": "Correct JSON",
"properties": {
"activities": [
{
"name": "MyActivity",
"description": "MyActivity description",
"type": "DatabricksNotebook",
"linkedServiceName": {
"referenceName": "LS_Databricks",
"type": "LinkedServiceReference"
},
"typeProperties": {
"notebookPath": "/Users/abc#myemail.com/Test_Job_1"
}
}
]
}
}