What does NTSTATUS 0x40000018 (STATUS_SERVICE_NOTIFICATION) mean?

 
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STATUS_WAS_UNLOCKED STATUS_WAS_LOCKED

STATUS_SERVICE_NOTIFICATION

This is a notification status, not a conventional failure

STATUS_SERVICE_NOTIFICATION is used to signal a service-related event through an NTSTATUS path. The associated operation may require the caller to inspect accompanying data or continue through a notification-specific code path.

Caller guidance

  • Do not convert the status to a generic Win32 error before checking the API contract.
  • Inspect any returned notification structure, event identifier, or service state.
  • Keep callback and subscription objects valid until the notification is acknowledged.
  • Separate expected notifications from transport or service-control failures in logs.

Debugging

If the status appears unexpectedly, trace which service registration or wait operation produced it. A stale subscription, reused event object, or mismatched notification buffer can make a valid notification look like an unrelated failure.

References


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