{"record":{"id":"e8cb241bd64ab5e0","repo":"risingwavelabs/risingwave","slug":"internal","errorCode":"Internal","errorMessage":"failed to get request","messagePattern":"failed to get request","errorType":"http","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/stream/src/task/barrier_worker/mod.rs","lineNumber":219,"sourceCode":"                }))\n                .is_err()\n            {\n                self.pair = None;\n                warn!(\"failed to send the response; the control stream was reset\");\n            }\n        } else {\n            debug!(?response, \"control stream has been reset. ignore response\");\n        }\n    }\n\n    async fn next_request(&mut self) -> StreamingControlStreamRequest {\n        if let Some((_, stream)) = &mut self.pair {\n            match stream.next().await {\n                Some(Ok(request)) => {\n                    return request;\n                }\n                Some(Err(e)) => self.reset_stream_with_err(\n                    anyhow!(TonicStatusWrapper::new(e)) // wrap the status to provide better error report\n                        .context(\"failed to get request\")\n                        .to_status_unnamed(Code::Internal),\n                ),\n                None => self.reset_stream_with_err(Status::internal(\"end of stream\")),\n            }\n        }\n        pending().await\n    }\n}\n\npub(super) enum TakeReceiverRequest {\n    Remote {\n        result_sender: oneshot::Sender<StreamResult<Receiver>>,\n        upstream_fragment_id: FragmentId,\n    },\n    Local(permit::Sender),\n}\n","sourceCodeStart":201,"sourceCodeEnd":237,"githubUrl":"https://github.com/risingwavelabs/risingwave/blob/6469eb736d691e8e9b8a419a57edd6429ca77417/src/stream/src/task/barrier_worker/mod.rs#L201-L237","documentation":"The streaming control gRPC stream between the compute node's barrier worker and the meta node failed while reading the next request. The worker wraps the underlying tonic status error as Code::Internal with this message and resets the control stream so a fresh connection can be re-established. It indicates transport-level failure of the control stream, not a barrier-processing bug.","triggerScenarios":"next_request() receives Some(Err(e)) from the tonic streaming control stream; the None (stream closed) case produces 'end of stream' instead.","commonSituations":"Network partition or dropped connection between compute node and meta node; meta node restarting or being killed; gRPC keepalive timeout; proxy/LB closing idle streams.","solutions":["Check connectivity between the compute node and meta node (address/port, firewall, network policies).","Inspect meta node logs at the matching time for shutdown or errors that terminated the stream.","Verify tonic/gRPC timeout and keepalive configuration on the control stream channel.","Rely on the built-in stream reset: the worker reconnects automatically; if errors recur, investigate the underlying status wrapped in TonicStatusWrapper for the root cause."],"exampleFix":"// before: opaque status propagated\nlet status = Status::internal(e.to_string());\n// after: wrap tonic status with context for better reports\nlet status = anyhow!(TonicStatusWrapper::new(e))\n    .context(\"failed to get request\")\n    .to_status_unnamed(Code::Internal);","handlingStrategy":"retry","validationCode":"// check control stream connectivity before heavy work\nlet ok = tokio::net::TcpStream::connect(&meta_addr).await.is_ok();","typeGuard":null,"tryCatchPattern":"// reconnect loop around control stream consumption\nloop {\n    match worker.next_request().await {\n        Ok(req) => handle(req),\n        Err(e) if e.to_string().contains(\"failed to get request\") => { backoff().await; reconnect().await; }\n        Err(e) => return Err(e),\n    }\n}","preventionTips":["Monitor gRPC channel state and configure keepalive pings on the control stream.","Alert on meta node restarts that terminate active control streams.","Ensure stable network paths between compute and meta nodes (no idle-terminating LBs)."],"tags":["network","grpc","streaming","barrier"],"backgroundTag":"http-request-failed","analyzedSha":"6469eb736d691e8e9b8a419a57edd6429ca77417","analyzedAt":"2026-09-11T21:06:21.487Z","contentChangedAt":"2026-09-11T21:06:21.487Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}