What does HRESULT 0x80EF019A (RTC_E_STATUS_CLIENT_GONE) mean?

RTC_E_STATUS_CLIENT_GONE

Operational meaning: RTC_E_STATUS_CLIENT_GONE

This HRESULT is emitted for a defined RTC state rather than an unspecified communications problem; that state is the addressed SIP resource was known previously but is no longer available and no forwarding Contact is supplied.

This result is represented as 0x80EF019A in the RTC SIP-status facility carrying status 410; record the symbolic name alongside the unsigned hexadecimal value; a decimal exception alone is poor evidence for RTC protocol diagnosis.

A defensible diagnosis of this result requires you to verify that the responding domain is authoritative, then inspect deprovisioning, alias retirement, migration records, and the absence of a redirect target; in the case, Gone is intended as a more durable condition than a current lookup miss; when a permanent replacement URI is known, redirection is more informative.

Verification workflow

1. Use protocol and object evidence to verify that the responding domain is authoritative, then inspect deprovisioning, alias retirement, migration records, and the absence of a redirect target.
2. Confirm the distinction that Gone is intended as a more durable condition than a current lookup miss; when a permanent replacement URI is known, redirection is more informative.
3. Start a fresh operation after you stop automatic retries to the retired URI, update provisioning or directory data, and create a new request only after selecting a current identity, and compare its final state with the failing run.

Protocol and object state

Interpreting this result requires both of these facts: The facility code preserves the SIP status number; diagnosis should start with the method and responding hop rather than treating every value as a local COM failure; also, the result branch assumes that Some responses invite a modified request or authenticated retry, while others are terminal for the current target or even global for the addressed user.

Signals worth preserving

• Code-specific proof: verify that the responding domain is authoritative, then inspect deprovisioning, alias retirement, migration records, and the absence of a redirect target.
• Correlation key: Call-ID/CSeq/tags.
• Protocol or object snapshot: status-specific headers.
• Last completed transition: retry or alternate-target decision.
• Expected output: request method and Request-URI.

Recovery and control flow

Recovery should be narrow: stop automatic retries to the retired URI, update provisioning or directory data, and create a new request only after selecting a current identity; while handling this result, do not let a higher layer simultaneously recreate the same session, registration, listener, or profile.

Example: A decommissioned employee SIP URI remains in an address book; the authoritative domain returns 410 after the account and aliases are retired.

Actions that do not address this condition

• Do not retry every 4xx or 5xx response with the identical request.
• Do not show a reason phrase as trusted server identity or authorization evidence.

Do not confuse it with

For this HRESULT, 404 reports that the resource is not found now, while 301 can identify a known permanent replacement; the neighboring results below require different control-flow decisions.

Technical references

• Microsoft RTC return constants.
• SIP response semantics.