openai/codex · error · anyhow::Error

duplicate inference start for {}

Error message

duplicate inference start for {}

What it means

Error "duplicate inference start for {}" thrown in openai/codex.

Source

Thrown at codex-rs/rollout-trace/src/reducer/inference.rs:47

}

impl TraceReducer {
    /// Starts an inference call and reduces its request payload into conversation items.
    ///
    /// Requests are model-visible transcript evidence, so the inference object is only
    /// inserted after the request snapshot has been normalized and linked to the turn.
    pub(super) fn start_inference_call(
        &mut self,
        seq: RawEventSeq,
        wall_time_unix_ms: i64,
        started: StartedInferenceCall,
    ) -> Result<()> {
        if self
            .rollout
            .inference_calls
            .contains_key(&started.inference_call_id)
        {
            bail!(
                "duplicate inference start for {}",
                started.inference_call_id
            );
        }

        let inference_call_id = started.inference_call_id.clone();
        let thread_id = started.thread_id.clone();
        let codex_turn_id = started.codex_turn_id.clone();
        let request_payload = started.request_payload.clone();
        let Some(turn) = self.rollout.codex_turns.get(&codex_turn_id) else {
            bail!(
                "inference start {inference_call_id} referenced unknown codex turn {codex_turn_id}"
            );
        };
        if turn.thread_id != thread_id {
            bail!(
                "inference start {inference_call_id} used thread {thread_id}, \
                 but codex turn {codex_turn_id} belongs to {}",

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rollout-trace/src/reducer/inference.rs:47 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/e8e32abbbacec488. Report an issue: GitHub.