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I am deploying an new metric alert to Azure with an ARM template.
I am following the exact same way of Microsoft doc.
With the only change that I deploy just 1 metric to an Automation account and not to an storage account

Template file

  "variables": {

    "criterion1": "[array(parameters('criterion1'))]",

    "criteria": "[concat(variables('criterion1'))]"





},

"resources": [

    {

        "name": "[parameters('alertName')]",

        "type": "Microsoft.Insights/metricAlerts",

        "location": "global",

        "apiVersion": "2018-03-01",

        "tags": {},

        "properties": {

            "description": "[parameters('alertDescription')]",

            "severity": "[parameters('alertSeverity')]",

            "enabled": "[parameters('isEnabled')]",

            "scopes": [

                "[parameters('resourceId')]"

            ],

            "evaluationFrequency": "[parameters('evaluationFrequency')]",

            "windowSize": "[parameters('windowSize')]",

            "criteria": {

                "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",

                "allOf": "[variables('criteria')]"

            },

            "actions": [

                {}

            ]

        }

    }

]

parameter file

  "criterion1": {

            "value": {

                "name": "1st criterion",

                "metricName": "TotalJob",

                "dimensions": [

                    {

                        "name": "Status",

                        "operator": "Include",

                        "values": [

                            "Failed"

                        ]

                    },

                    {

                        "name": "Status",

                        "operator": "Include",

                        "values": [

                            "Completed"

                        ]

                    }

                ],

                "operator": "GreaterThan",

                "threshold": "5",

                "timeAggregation": "Total"

            }

        }

But when i deploy this to Azure my Powershell command get stuck without giving any errors even with -DeploymentDebugLogLevel All parameter on it. In Azure portal I got the error "Internal server error" without any context. The json log gives me following logs:

{

"authorization": {

    "action": "Microsoft.Insights/metricAlerts/write",

    "scope": "/subscriptions/xxxxxx/resourcegroups/bilalachahbar/providers/Microsoft.Insights/metricAlerts/New Metric Alert"

},

"caller": "xxxx",

"channels": "Operation",

"claims": {

    "aud": "https://management.azure.com/",

    "iss": "https://sts.windows.net/17b5a1d-057c-4ac-a15a-08758f7a7064/",

    "iat": "15596014",

    "nbf": "15596014",

    "exp": "15599914",

    "aio": "42RgYDgypS7rfe/Of0l1R+q3TbCgA=",

    "appid": "0e4a093a-c6fd-4fba-b4e5-f07ba479f203",

    "appidacr": "1",

    "http://schemas.microsoft.com/identity/claims/identityprovider": "https://sts.windows.net/17b35a1d-057c-4ac5-a15a-08758f7a7064/",

    "http://schemas.microsoft.com/identity/claims/objectidentifier": "a3db39bf-8c65-4b84-b049-d7af99bfb3e",

    "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "a3db39bf-8c65-4b84-b049-d7af99bfb3e",

    "http://schemas.microsoft.com/identity/claims/tenantid": "17b35a1d-057c-4ac5-a15a-087f7a7064",

    "uti": "SCkIk235EScz0Hst20AA",

    "ver": "1.0"

},

"correlationId": "8013b5-9788-41ed-afcf-0dbd8276349c",

"description": "",

"eventDataId": "e39509-0837-4435-af7a-02ba1462055f",

"eventName": {

    "value": "EndRequest",

    "localizedValue": "End request"

},

"category": {

    "value": "Administrative",

    "localizedValue": "Administrative"

},

"eventTimestamp": "2018-12-27T14:11:48.1462445Z",

"id": "/subscriptions/xxxxx/resourcegroups/xxxxxx/providers/Microsoft.Insights/metricAlerts/New+Metric+Alert/events/e39509-0837-4435-af7a-02ba1462055f/ticks/815167081462445",

"level": "Error",

"operationId": "e390389-ecc1-4a2-8c2-d94ea635cb",

"operationName": {

    "value": "Microsoft.Insights/metricAlerts/write",

    "localizedValue": "Create or update metric alert"

},

"resourceGroupName": "xxxxx",

"resourceProviderName": {

    "value": "Microsoft.Insights",

    "localizedValue": "Microsoft Insights"

},

"resourceType": {

    "value": "Microsoft.Insights/metricAlerts",

    "localizedValue": "Microsoft.Insights/metricAlerts"

},

"resourceId": "/subscriptions/xxxxxx/resourcegroups/bilalachahbar/providers/Microsoft.Insights/metricAlerts/New Metric Alert",

"status": {

    "value": "Failed",

    "localizedValue": "Failed"

},

"subStatus": {

    "value": "InternalServerError",

    "localizedValue": "Internal Server Error (HTTP Status Code: 500)"

},

"submissionTimestamp": "2018-12-27T14:12:05.0719055Z",

"subscriptionId": "xxxxxx",

"properties": {

    "statusCode": "InternalServerError",

    "serviceRequestId": "8613b5-9788-41d-afcf-0dbd27639c",

    "statusMessage": "{"error":{"code":"InternalServerError","message":"The server encountered an internal error, please retry. If the problem persists, contact support."}}"

},

"relatedEvents": 

}

An other stack overflow question got an sort of same question.
He got the problem when using an resource that is not supported anymore but I guess that is not the case with me because the official MS documentation is from september this year. I got the same issues when I use the exact same arm template that is provided in the documentation

I found my own error
Action groups are required when you want to deploy metric alerts.
As you can see in the documentation they provide an action ID, and I didn't. As I thought that it wasn't necessary it actually is.
I know this is obvious but unfortunately I did not saw this in the documentation or in the error. After some debugging and looking in the Resource Explorer I've noticed this.
SO future reader I hope this will solve your issue

One little feedback is that there is no depends on value ATM so I can not create an action group resource first in the same arm template