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UTC_E_RPC_TIMEOUT
Map the code to the scenario graph: UTC API manager RPC call
UTC_E_RPC_TIMEOUT (0x87C51029) is a Universal Telemetry Client result from the Universal Telemetry Client API coordination layer. A reliable investigation preserves the producing action before any cleanup runs. The relevant state is UTC API manager RPC call: the request crossed into the API manager but exceeded its RPC completion deadline. This identifies a specific UTC/DiagTrack condition, not a general service failure.
UTC API requests may cross an RPC boundary and complete asynchronously even when exposed through a synchronous wrapper. Request submission, waiting, cancellation and result retrieval are separate stages, so one request ID should tie the evidence together.
Data needed for triage
| UTC diagnostic field | Value |
|---|---|
| Producing layer | Universal Telemetry Client API coordination |
| Owning state or object | UTC API manager RPC call |
| Evidence to collect | interface/opnum if available, request ID, client/server PIDs, endpoint, timeout, service state and RPC diagnostics |
| Narrow comparison | invoke a lightweight UTC API over the same endpoint, then reproduce the slow operation |
| Do not confuse with | UTC_E_TRY_GET_SCENARIO_TIMEOUT_EXCEEDED is specifically a scenario-definition query timeout |
Reproduce without collateral changes
- Collect the high-value state: interface/opnum if available, request ID, client/server PIDs, endpoint, timeout, service state and RPC diagnostics.
- Use a passing control on the same Windows build, then invoke a lightweight UTC API over the same endpoint, then reproduce the slow operation.
Nearby result: UTC_E_TRY_GET_SCENARIO_TIMEOUT_EXCEEDED — is specifically a scenario-definition query timeout.
Request-lifetime note
Assign a correlation identifier before submission and retain it through wait, callback, cancellation and result retrieval. This prevents a late completion from being mistaken for the response to a newer request.
Fix the contract
Remove server-side blocking or restore the service endpoint before retrying with bounded backoff.
Technical references
- Microsoft Open Specifications: Windows error-code registry — reference for Universal Telemetry Client API coordination while interpreting this result.
- Microsoft: Universal Telemetry Client configuration diagnosis — reference for Universal Telemetry Client API coordination while interpreting this result.
- Microsoft: Remote Procedure Call documentation — reference for Universal Telemetry Client API coordination while interpreting it.
- Microsoft: WaitForSingleObject
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