{"record":{"id":"2d27daa74d16733c","repo":"odysseus-dev/odysseus","slug":"session-session-id-not-found-2d27da","errorCode":null,"errorMessage":"Session '{session_id}' not found","messagePattern":"Session '(.+?)' not found","errorType":"http","errorClass":"HTTPException","httpStatus":404,"severity":"warning","filePath":"routes/history/history_routes.py","lineNumber":154,"sourceCode":"        if meta:\n            entry[\"metadata\"] = meta\n        return entry\n\n    @router.get(\"/api/history/{session_id}\")\n    async def get_session_history(\n        request: Request,\n        session_id: str,\n        limit: Optional[int] = None,\n        offset: Optional[int] = None,\n    ) -> Dict[str, Any]:\n        _verify_session_owner(request, session_id)\n        if limit is not None:\n            page_limit = max(1, min(int(limit), 100))\n            db = SessionLocal()\n            try:\n                db_session = db.query(DbSession).filter(DbSession.id == session_id).first()\n                if db_session is None:\n                    raise HTTPException(404, f\"Session '{session_id}' not found\")\n\n                total = (\n                    db.query(DbChatMessage)\n                    .filter(DbChatMessage.session_id == session_id)\n                    .count()\n                )\n                page_offset = int(offset) if offset is not None else max(total - page_limit, 0)\n                page_offset = max(0, min(page_offset, total))\n                # Keep display pagination page-scoped. ``get_session`` is the\n                # full model-context hydration seam and must not be entered here.\n                rows = (\n                    db.query(DbChatMessage)\n                    .filter(DbChatMessage.session_id == session_id)\n                    .order_by(DbChatMessage.timestamp)\n                    .offset(page_offset)\n                    .limit(page_limit)\n                    .all()\n                )","sourceCodeStart":136,"sourceCodeEnd":172,"githubUrl":"https://github.com/odysseus-dev/odysseus/blob/f9235ebbf13f693a6fd29ce70b097f6ec83705bf/routes/history/history_routes.py#L136-L172","documentation":"HTTP 404 from the paginated history branch of GET /api/session/{session_id}/history: the session passes the owner check but no DbSession row with that id exists, so server-side persisted history cannot be served. Note the owner verification ran first (it consults session_manager), so this specifically means 'not in the database'.","triggerScenarios":"GET /api/session/{id}/history?limit=20 for a session that exists only in memory (never persisted), was deleted from the DB, or whose ID came from a different deployment/database.","commonSituations":"In-memory-only sessions when DB persistence is disabled; database file wiped or migrated; pointing the client at a fresh server instance with an old session list.","solutions":["Confirm the session was persisted (it should appear via the session list endpoint)","Check the DB connection / database file the server uses matches the one that stored the session","Create a new session if the old data is genuinely gone"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"def session_in_db(session_id: str) -> bool:\n    r = requests.get(f'{base}/api/sessions', headers=hdrs, timeout=30)\n    return any(s.get('id') == session_id for s in r.json().get('sessions', r.json()))","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Prefer the DB-backed paginated history call (?limit=N) when persistence matters","Verify the server points at the intended database file before blaming missing sessions","After DB resets/migrations, invalidate cached session ids in clients"],"tags":["http-404","session","history","pagination","persistence"],"backgroundTag":null,"analyzedSha":"f9235ebbf13f693a6fd29ce70b097f6ec83705bf","analyzedAt":"2026-08-14T21:47:48.359Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}