exo-explore/exo · error · HTTPException

{exc}

Error message

{exc}

What it means

Error "{exc}" thrown in exo-explore/exo.

Source

Thrown at src/exo/api/main.py:495

        try:
            placements = get_instance_placements(
                PlaceInstance(
                    model_card=model_card,
                    sharding=sharding,
                    instance_meta=instance_meta,
                    min_nodes=min_nodes,
                ),
                node_memory=self.state.node_memory,
                node_network=self.state.node_network,
                node_backends=self.state.node_backends,
                topology=self.state.topology,
                current_instances=self.state.instances,
                download_status=self.state.downloads,
                node_rdma_ctl=self.state.node_rdma_ctl,
            )
        except ValueError as exc:
            raise HTTPException(status_code=400, detail=str(exc)) from exc

        current_ids = set(self.state.instances.keys())
        new_ids = [
            instance_id for instance_id in placements if instance_id not in current_ids
        ]
        if len(new_ids) != 1:
            raise HTTPException(
                status_code=500,
                detail="Expected exactly one new instance from placement",
            )

        return placements[new_ids[0]]

    async def get_placement_previews(
        self,
        model_id: ModelId,
        node_ids: Annotated[list[NodeId] | None, Query()] = None,
    ) -> PlacementPreviewResponse:

View on GitHub (pinned to 21a54c5ea0)

When it happens

Trigger: Thrown at src/exo/api/main.py:495 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/48292b120afa5980. Report an issue: GitHub.