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RTC_E_SIP_STACK_SHUTDOWN
What the RTC value marks: RTC_E_SIP_STACK_SHUTDOWN
This result belongs to the SIP transport and reachability boundary area of RTC and identifies an operation targeted an RTC SIP stack that has already entered shutdown.
This result carries 0x80EE001E in the RTC interface facility 0xEE; store the result value at the first RTC callback or method boundary, before retry logic replaces it with a broader timeout or connection message.
Start the result investigation by having the trace record shutdown owner, client generation, pending callbacks, and object creation time; for this HRESULT, do not skip the distinction that the existing object cannot be revived by a network retry.
Protocol and object boundary
| RTC area | SIP transport and reachability boundary |
|---|---|
| Objects to correlate | SIP URI, proxy/registrar address, DNS results, socket, HTTP CONNECT tunnel, transaction timer |
| Condition to prove | an operation targeted an RTC SIP stack that has already entered shutdown |
| Safe corrective direction | stop using the old generation and initialize a new client only after deterministic teardown |
Interpreting this result requires both of these facts: DNS discovery, socket establishment, proxy tunneling, and SIP transaction completion are distinct phases and should not be collapsed into one “network error”; also, the result branch assumes that A retry is safe only after the application identifies whether any request bytes were transmitted and whether the previous client transaction still exists.
Evidence that separates the cause
Build the incident record before automatic recovery runs; the result record must identify one client/profile/session generation and the exact signaling, presence, or media transition in progress.
- Code-specific proof for this HRESULT: record shutdown owner, client generation, pending callbacks, and object creation time.
- Identity and target for this HRESULT: DNS query type and answers.
- State at production for this HRESULT: local/remote socket tuple.
- Timing and ordering for this HRESULT: proxy tunnel response.
Sanitize the result evidence before storage: secrets and user content should disappear, while framing, domains, sizes, hashes, timing, and object-state changes remain available for reproduction.
A safe diagnostic sequence
- Record this result and
0x80EE001Eat the first RTC method or event that returns it. - Place it in its exact phase: parsing, discovery, transport, authentication, profile validation, dialog control, media, roaming, registration, redirection, or final response handling.
- Identify the client, profile, session, participant, presence object, terminal, or port manager that owns this it occurrence.
- prove the condition by ensuring the trace can record shutdown owner, client generation, pending callbacks, and object creation time.
- Apply one controlled change for this HRESULT: stop using the old generation and initialize a new client only after deterministic teardown; then verify the result return value and resulting RTC state.
The result diagnosis is strongest when object state and protocol trace share timestamps and transaction identifiers; when diagnosing it, avoid treating packet capture and HRESULT logging as substitutes for one another.
How to handle the result
The owning RTC component should stop using the old generation and initialize a new client only after deterministic teardown; for this HRESULT, it should also settle or cancel its previous operation before callers begin a replacement.
Before retrying it, classify the previous operation as definitely failed, definitely completed, or remotely uncertain; for this HRESULT, that distinction prevents duplicate dialogs, bindings, transfers, or roaming mutations.
Example for this HRESULT: A delayed callback tries to send a request after application shutdown completed.
Actions that do not address this condition
- With it, do not retry rapidly across every resolved address without preserving the failure phase.
- Another non-solution for this HRESULT is to do not switch transports without checking profile policy and authentication constraints.
- Do not translate it into a broad “connection failed” label before preserving the RTC symbol and producing phase.
Related RTC results
It is tied to the condition “an operation targeted an RTC SIP stack that has already entered shutdown”; preserve that producing boundary before choosing recovery; for this HRESULT, the neighboring results below require different control-flow decisions.
RTC_E_INVALID_ADDRESS_LOCAL | the local address configured in the RTC profile cannot be used for the requested transport or session |
|---|---|
RTC_E_SIP_TLS_FAIL | the TLS transport failed outside the more specific tunnel, timeout, certificate, or compatibility cases |
RTC_E_SIP_TIMEOUT | the local RTC SIP transaction reached its timer limit without a qualifying final response |
Telemetry for this HRESULT should retain these distinctions even when several outcomes share HRESULT severity.
Verification after a fix
A useful it regression does more than expect an exception; the result test constructs “an operation targeted an RTC SIP stack that has already entered shutdown”, checks the exact HRESULT at the producing RTC boundary, and verifies state ownership before and after the targeted correction.
Technical references
- Microsoft RTC return constants — API or protocol rules used to interpret it.
- SIP transport behavior — authoritative context for the boundary.
- Locating SIP servers — definitions relevant when reproducing it.
- SIP and TEL URLs in RTC — API or protocol rules used to interpret it.
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