ARM Template - conflicting update - azure

Question

There is ARM template for provisioning two Azure Search services
"resources": [
{
"type": "Microsoft.Search/searchServices",
"name": "[parameters('serviceName')]",
"apiVersion": "[parameters('serviceApiVersion')]",
"location": "[parameters('location')]",
"properties": {
"sku": {
"name": "[parameters('sku')]"
},
"replicaCount": 1,
"partitionCount": 1,
"hostingMode": "[parameters('hostingMode')]"
}
},
{
"type": "Microsoft.Search/searchServices",
"name": "[concat(parameters('serviceName'), 'secondary')]",
"apiVersion": "[parameters('serviceApiVersion')]",
"location": "[parameters('location')]",
"properties": {
"sku": {
"name": "[parameters('sku')]"
},
"replicaCount": 1,
"partitionCount": 1,
"hostingMode": "[parameters('hostingMode')]"
}
}]
Deployment of ARM Template provisions one search service and fails another with response:
{
"error": {
"code": "Unknown",
"message": "There was a conflicting update. No change was made to the resource from this request. RequestId: b65a51b5-cd87-4dc5-82d9-9041ddd1c2dc",
"target": null,
"details": null
}
}
Does anyone face issue like that?

Answer 1

Perhaps search services cannot be concurrently provisioned in the same resource group. Try adding a "dependsOn" property to the second search service.

Answer 2

The issue
The search services don't rely on another, so a dependsOn property wouldn't be required.
I think the problem is that your arm syntax is invalid.
I don't know which apiVersion you are using, but I cannot find any that has the same syntax...
(it resembles 2015-02-28 the most, but the hostingMode field is not allowed there).
Solution
Either use apiVersion 2015-02-28 without hostingmode or (if you need that field) use a newer apiVersion where "sku" is taken outside the "properties". The following works for me!
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"resources": [
{
"type": "Microsoft.Search/searchServices",
"name": "parameters('serviceName')",
"apiVersion": "2015-08-19",
"location": "parameters('location')",
"properties": {
"replicaCount": 1,
"partitionCount": 1,
"hostingMode": "default"
},
"sku": {
"name": "basic"
}
},
{
"type": "Microsoft.Search/searchServices",
"name": "[concat(parameters('serviceName'), 'secondary')]"
"apiVersion": "2015-08-19",
"location": "parameters('location')",
"properties": {
"replicaCount": 1,
"partitionCount": 1,
"hostingMode": "default"
},
"sku": {
"name": "basic"
}
}]
}