{"record":{"id":"7657abbb8ff33b28","repo":"bytedance/deer-flow","slug":"failed-to-validate-checkpoint","errorCode":null,"errorMessage":"Failed to validate checkpoint","messagePattern":"Failed to validate checkpoint","errorType":"http","errorClass":"HTTPException","httpStatus":500,"severity":"error","filePath":"backend/app/gateway/services.py","lineNumber":974,"sourceCode":"    if not checkpoint_id:\n        return\n\n    read_config: dict[str, Any] = {\n        \"configurable\": {\n            \"thread_id\": thread_id,\n            \"checkpoint_ns\": checkpoint_ns,\n            \"checkpoint_id\": str(checkpoint_id),\n        }\n    }\n    if checkpoint_map is not None:\n        read_config[\"configurable\"][\"checkpoint_map\"] = checkpoint_map\n\n    checkpointer = get_checkpointer(request)\n    try:\n        checkpoint_tuple = await checkpointer.aget_tuple(read_config)\n    except Exception as exc:\n        logger.exception(\"Failed to validate checkpoint %s for thread %s\", checkpoint_id, sanitize_log_param(thread_id))\n        raise HTTPException(status_code=500, detail=\"Failed to validate checkpoint\") from exc\n    if checkpoint_tuple is None:\n        raise HTTPException(status_code=404, detail=f\"Checkpoint {checkpoint_id} not found\")\n\n    configurable = config.setdefault(\"configurable\", {})\n    if not isinstance(configurable, dict):\n        raise HTTPException(status_code=400, detail=\"request config configurable must be an object\")\n    configurable[\"thread_id\"] = thread_id\n    configurable[\"checkpoint_ns\"] = checkpoint_ns\n    configurable[\"checkpoint_id\"] = str(checkpoint_id)\n    if checkpoint_map is not None:\n        configurable[\"checkpoint_map\"] = checkpoint_map\n\n\nasync def ensure_checkpoint_history_seeded(\n    request: Request,\n    *,\n    thread_id: str,\n    assistant_id: str | None,","sourceCodeStart":956,"sourceCodeEnd":992,"githubUrl":"https://github.com/bytedance/deer-flow/blob/1dd6ba1acb03700589994b0366c5d1c7d05e2eff/backend/app/gateway/services.py#L956-L992","documentation":"HTTP 500 raised when checkpointer.aget_tuple() throws while validating a client-supplied checkpoint reference (checkpoint_id/checkpoint_ns/checkpoint_map). The gateway logs the full exception (with sanitized thread id) but returns a generic detail so internal errors don't leak. It is an infrastructure failure, not a bad request.","triggerScenarios":"A run referencing a checkpoint_id while the backing checkpoint store (DB/Redis) errors on read: connection loss, timeout, deserialization failure of a stored checkpoint blob.","commonSituations":"Database outage or restart under load; corrupted checkpoint rows after a schema/version change; Redis eviction of checkpoint data in cache-backed checkpointers.","solutions":["Check gateway logs for the 'Failed to validate checkpoint' exception — it carries the real cause (connection error, deserialization stack).","Restore/verify the checkpoint store health (DB up, migrations applied, Redis memory) and retry.","If the checkpoint is optional, retry the run without checkpoint_id to confirm the store is the issue."],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"catch 500 'Failed to validate checkpoint'; retry with backoff (store-level transient errors are the usual cause); if persistent, check gateway logs for the underlying exception.","preventionTips":["Keep the checkpoint store (DB/Redis) monitored and highly available.","Apply checkpoint-related migrations fully before switching traffic.","Include a checkpoint-read health check in deployment probes."],"tags":["runs","http-500","checkpoints","infrastructure"],"backgroundTag":null,"analyzedSha":"1dd6ba1acb03700589994b0366c5d1c7d05e2eff","analyzedAt":"2026-08-14T21:20:34.804Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}