exo-explore/exo · error · HTTPException

No instance found for model {model_id}

Error message

No instance found for model {model_id}

What it means

Error "No instance found for model {model_id}" thrown in exo-explore/exo.

Source

Thrown at src/exo/api/main.py:1008

        Raises HTTPException 404 if no instance is found for the model.
        """
        if not any(
            instance.shard_assignments.model_id == model_id
            for instance in self.state.instances.values()
        ):
            # Check if model is actually downloaded
            model_is_downloaded = any(
                isinstance(download, DownloadCompleted)
                and download.shard_metadata.model_card.model_id == model_id
                for node_downloads in self.state.downloads.values()
                for download in node_downloads
            )
            if not model_is_downloaded:
                await self._trigger_notify_user_to_download_model(model_id)

            raise HTTPException(
                status_code=404, detail=f"No instance found for model {model_id}"
            )
        return model_id

    def stream_events(self) -> StreamingResponse:
        def _generate_json_array(events: Iterable[Event]) -> Iterable[str]:
            yield "["
            first = True
            for event in events:
                if not first:
                    yield ","
                first = False
                yield event.model_dump_json()
            yield "]"

        return StreamingResponse(
            _generate_json_array(self._event_log.read_all()),
            media_type="application/json",

View on GitHub (pinned to 21a54c5ea0)

When it happens

Trigger: Thrown at src/exo/api/main.py:1008 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of exo-explore/exo@21a54c5ea0 (2026-08-26). Data as JSON: /api/errors/ac3f6ce43ba8b645. Report an issue: GitHub.