Use this consolidated error code index to navigate HTTP, AWS, Azure, and GCP failures from a single technical library. Each entry links to source-backed diagnosis, root-cause patterns, and production-focused remediation steps. Start broad, then drill into provider pages, operational categories, compare guides, or incident playbooks.
62 error codes available
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Azure returns `ValidationError` when request values violate provider-side semantic rules, even if request syntax is structurally valid.
Azure returns `Unauthorized` (401) when request authentication is missing, invalid, expired, or mismatched for the target endpoint.
ARM returns `InvalidResourceReference` when a referenced resource is missing or referenced with an incorrect identifier/path.
Azure returns `ResourceModified` when a conditional update targets a stale resource version that changed after it was read.
Azure reports `VMProvisioningStateFailed` when virtual machine provisioning ends in a failed state during OS, extension, image, or dependency setup.
Azure returns `AllocationFailed` when the target cluster or region cannot provide the requested VM size/capacity at deployment time.
Azure returns `ImageNotFound` when the VM image reference cannot be resolved for the selected region, subscription, or source registry.
Azure returns `StorageAccountAlreadyTaken` when the requested storage account name is already in use globally.
Azure returns `StorageAccountQuotaExceeded` when storage account capacity, ingress/egress, or request-rate limits are exceeded for the workload.
Azure Storage returns `ServerBusy` (503) when request load exceeds what the target partition/account can handle at that moment.
Azure AADSTS7000215 indicates that the client secret value provided in a token request is invalid for the specified application. This is a specific credential m...
Microsoft Entra ID returns `AADSTS90002` when the tenant identifier in the auth request cannot be found or resolved.
Microsoft Entra or Microsoft Graph returns user-not-found responses when the referenced user object cannot be resolved in the active tenant.
Microsoft Entra or Microsoft Graph returns group-not-found responses when the target group object cannot be resolved in the current tenant directory.
Azure returns `VMNetworkInterfaceNotFound` when a VM operation references a network interface that cannot be resolved in the current scope.