Knowledge

DNS_ERROR_ROLLOVER_ALREADY_QUEUED - 9120 (0x23A0)

The specified signing key is already queued for rollover.

Updated: Feb 21, 2026

Technical Background

The DNS_ERROR_ROLLOVER_ALREADY_QUEUED error code, with the numeric value of 9120 and hexadecimal representation 0x23A0, indicates that a specific DNS signing key has already been queued for rollover. This error is encountered in scenarios where the DNS security protocol (DS) requires key management operations.

Error Details

This error typically arises when an attempt is made to queue a DNS signing key for rollover, but it is discovered that the key is already in the process of being replaced or updated. The DNSSEC (Domain Name System Security Extensions) mechanism ensures the continuity and security of DNS data by managing keys used for digital signatures.

Common Causes

  • Key Management Operations: When a new signing key is intended to replace an existing one, it may be necessary to queue the old key for rollover. If this process has already been initiated, attempting to queue the same key again will result in this error.
  • Duplicate Key Requests: In scenarios where multiple administrators or systems attempt to manage keys simultaneously, a duplicate request might occur, leading to this error.

Real-World Context

In practice, this error can be encountered during the maintenance and security operations of DNS zones. Administrators must ensure that key management processes are coordinated to avoid conflicts and ensure the integrity of DNS data.

Is This Error Critical?

The DNS_ERROR_ROLLOVER_ALREADY_QUEUED is not a critical error in terms of system stability or performance, but it does indicate an issue with the current state of key management. It should be addressed promptly to maintain the security and reliability of the DNS zone.

How to Diagnose

To diagnose this issue, follow these steps:

  1. Review Key Management Logs: Check the DNS server logs for any previous rollover operations related to the affected signing key.
  2. Verify Current State: Confirm whether the key is already queued or in the process of being replaced by reviewing the current state of the DNS zone's security settings.
  3. Coordinate Operations: Ensure that all administrators and systems are aware of ongoing key management activities to avoid duplicate requests.

How to Resolve

To resolve this issue, consider the following steps:

  1. Cancel Duplicate Requests: If a duplicate request was made accidentally, cancel it to prevent further processing.
  2. Complete Existing Operations: Allow any existing rollover operations to complete before attempting to queue the key again.
  3. Coordinate Key Management: Ensure that all administrators and systems are coordinated in their key management activities to avoid conflicts.

Developer Notes

Developers should be aware of the DNSSEC protocol's requirements for key management and ensure that their applications handle key rollover operations correctly. This includes properly queuing keys for rollover and handling errors gracefully when such operations are already queued or in progress.

Related Errors

  • DNS_ERROR_KEY_NOT_IN_ZONE (9123, 0x23C7): Indicates a signing key is not present in the zone.
  • DNS_ERROR_ROLLOVER_PENDING (9124, 0x23CA): Indicates that a rollover operation is pending but has not yet been initiated.

FAQ

Q: What does DNS_ERROR_ROLLOVER_ALREADY_QUEUED mean?

A: This error indicates that the specified signing key is already queued for rollover in the DNS zone.

Q: How can I prevent this error from occurring?

A: Ensure that all administrators and systems are coordinated during key management operations to avoid duplicate requests. Review logs for any previous rollover activities before initiating new ones.

Q: Is this error critical for system stability?

A: No, but it indicates an issue with the current state of key management and should be addressed promptly to maintain DNS zone security.

Summary

The DNS_ERROR_ROLLOVER_ALREADY_QUEUED is a specific error code that occurs when attempting to queue a DNS signing key for rollover, only to find out that the key is already in the process. This error highlights the importance of coordinated key management practices and proper handling of DNSSEC operations.