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RTC_E_STATUS_CLIENT_REQUEST_ENTITY_TOO_LARGE
Operational meaning: RTC_E_STATUS_CLIENT_REQUEST_ENTITY_TOO_LARGE
Diagnosis begins inside a peer, proxy, registrar, or gateway returning a specific SIP response to the RTC transaction, where the decisive condition for this HRESULT is the request body exceeds the size the server is willing or able to process.
The numeric form of this result is 0x80EF019D in the RTC SIP-status facility carrying status 413; an exception translator handling it should preserve this value before converting it into application-facing call or presence states.
Evidence for this HRESULT should show that you record body media type, encoded byte count, server limit hints, and Retry-After if supplied; the diagnostic distinction for this HRESULT is that Request Entity Too Large concerns the body, whereas 414 concerns the Request-URI.
Signals worth preserving
Do not wait for a generic failure notification to log this result; preserve the API call or event producing it together with the RTC object and transaction state visible at that moment.
- Code-specific proof for this HRESULT: record body media type, encoded byte count, server limit hints, and Retry-After if supplied.
- Correlation key for this HRESULT: request method and Request-URI.
- Protocol or object snapshot for this HRESULT: responding Via hop.
- Last completed transition for this HRESULT: Call-ID/CSeq/tags.
- Expected output for this HRESULT: status-specific headers.
When recording this result, redact credentials, full telephone numbers, private contact lists, and message bodies; for this HRESULT, retain permitted URI domains, header names, byte counts, hashes, transaction identifiers, timestamps, and state transitions.
Recovery and control flow
Resolve this result at its producing layer: reduce or split the payload using a supported protocol path; retry later only when the response indicates a temporary limit; after it, a separate UI or watchdog retry must wait until that layer reports a final state.
Do not turn it into an immediate unconditional retry; for this HRESULT, first determine whether the peer could have accepted the prior request and whether RTC still owns a live transaction.
Example for this HRESULT: A MESSAGE carrying an oversized document is rejected by the receiving gateway.
Protocol and object boundary
| RTC area | SIP final response boundary |
|---|---|
| Condition to prove | the request body exceeds the size the server is willing or able to process |
| Objects to correlate | SIP request method, client transaction, response status, dialog identifiers and method-specific headers |
| Safe corrective direction | reduce or split the payload using a supported protocol path; retry later only when the response indicates a temporary limit |
The API and protocol context for this HRESULT is not optional: 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; the related it control-flow rule is 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.
Verification workflow
- Record it and
0x80EF019Dat 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 body media type, encoded byte count, server limit hints, and Retry-After if supplied.
- Apply one controlled change for this HRESULT: reduce or split the payload using a supported protocol path; retry later only when the response indicates a temporary limit; then verify the result return value and resulting RTC state.
Use RTC event state to interpret the protocol trace for this HRESULT, and use the trace to verify what left or reached the host; for this HRESULT, this two-sided correlation identifies the producing layer.
Actions that do not address this condition
- With it, do not show a reason phrase as trusted server identity or authorization evidence.
- also do not retry every 4xx or 5xx response with the identical request.
- Do not translate it into a broad “connection failed” label before preserving the RTC symbol and producing phase.
Do not confuse it with
The practical separator for this HRESULT is this: 415 indicates an unsupported body format rather than excessive size; for this HRESULT, compare that boundary with these related RTC values.
RTC_E_STATUS_GLOBAL_BUSY_EVERYWHERE | the user is busy at every known location and further branching should stop |
|---|---|
RTC_E_STATUS_REQUEST_TERMINATED | the original request was terminated before normal completion, commonly after CANCEL |
RTC_E_STATUS_CLIENT_ADDRESS_INCOMPLETE | the Request-URI lacks information required to identify or route the destination |
The comparison prevents it from being flattened into a subsystem-wide error bucket with unsafe generic remediation.
Verification after a fix
A useful it regression does more than expect an exception; the result test constructs “the request body exceeds the size the server is willing or able to process”, 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 response semantics — authoritative context for the boundary.
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