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Troubleshoot the SubscriptionRequestsThrottled error code (429)

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This article discusses how to identify and resolve the SubscriptionRequestsThrottled error (status 429) that occurs when you try to create and deploy a Microsoft Azure Kubernetes Service (AKS) cluster.

Symptoms

When you try to create an AKS cluster, you receive the following "Reconcile standard load balancer failed" error message that shows a "SubCode" value of SubscriptionRequestsThrottled and a "Status" value of 429:

Reconcile standard load balancer failed.

Details: outboundReconciler retry failed:

Category: ClientError;

SubCode: SubscriptionRequestsThrottled;

Dependency: Microsoft.Network/PublicIPAddresses;

OrginalError: autorest/azure: Service returned an error. Status=429

Code="SubscriptionRequestsThrottled"

Message="Number of requests for subscription '<subscription-id-guid>' and operation 'GET/SUBSCRIPTIONS/RESOURCEGROUPS/PROVIDERS/MICROSOFT.NETWORK/PUBLICIPADDRESSES' exceeded the backend storage limit. Please try again after '6' seconds.";

AKSTeam: Networking, Retriable: false.

Request throttling can occur on different Azure components, so the error message might be different based on the kind of resource this issue is occurring on.

Cause

Azure Resource Manager requests are being throttled. For information about how Azure Resource Manager limits work, and the specific limits per hour, see Throttling Resource Manager requests.

Solution 1: Use another subscription

If you have access to a different subscription, you can simply deploy the cluster to that subscription.

Solution 2: Modify your access patterns

To resolve this issue, examine your access patterns for the throttled subscription. The following table lists the possible access patterns and corresponding solutions.

Access pattern Solution
Automated scripts constantly scan the subscription Run the scripts less frequently
Many users access the subscription Have each user use their own subscription
Scripts scan every storage account in the subscription Scope the script to query only the resources that it must have

More information

Contact us for help

If you have questions or need help, create a support request, or ask Azure community support. You can also submit product feedback to Azure feedback community.