An error log with event id 4015 appears in the DNS Server log

Question

Hello

The DNS Server log of our AD domain controller frequently shows the error log of event id 4015：

The DNS server encountered a critical error from Active Directory and prompted to check if Active Directory is working properly. The extended error debugging message is "0000051B: AttrErr: DSI-030F222a, #1: 0: 0000051B: Dsi-030f232a, problem 1005 (CONSTRAINT_ATT_TYPE), data 0, Att 20119 (nTSecurityDescriptor) ", and the event data contains this error.

However, the DNS status is normal. DNS resolution is normal. What could be the reason for this event id 4015 error log? Thank you

Answer 1

Hi yanhaowen,

Based on the error details you shared, the event typically indicates an intermittent communication or replication issue between the DNS Server service and Active Directory. The “nTSecurityDescriptor” attribute reference suggests a temporary inconsistency or permission-related problem when the DNS server queries AD-integrated zones. In most cases, these events are benign and can be safely ignored if name resolution and replication are working properly.

This issue can occur due to several reasons:

• Replication latency or AD connectivity issues, especially if the DNS server starts before AD services are fully initialized.

Permission inconsistencies on the DNS application directory partitions, which can trigger constraint violations like the one in your error message.

Multiple domain controllers with DNS installed may sometimes conflict during startup or replication, especially if one is misconfigured or unreachable.

To mitigate this, I recommend:

 1. Ensuring that **DNS servers point to peer DCs first** in their network settings, not to themselves.

 2. Running `dcdiag /test:DNS /v /c /e` and `repadmin /replsummary` to check for replication or DNS configuration issues.

 3. Verifying that **Active Directory permissions** on the DNS zones are intact and not corrupted.

 4. Reviewing the **DNS service startup order** delaying it slightly may help if AD isn't fully ready when DNS initializes.

If the error persists but functionality remains unaffected, it may be safe to monitor rather than act immediately. Still, addressing the root cause helps ensure long-term stability.

Please let me know if the issue persists after these checks. If you find this answer helpful, kindly click “Accept Answer” so others can benefit as well 😊

Jason,