{"record":{"id":"e0ae0a4f7e998dc5","repo":"Zackriya-Solutions/meetily","slug":"failed-to-write-chunk-to-file","errorCode":null,"errorMessage":"Failed to write chunk to file: {}","messagePattern":"Failed to write chunk to file: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"frontend/src-tauri/src/parakeet_engine/parakeet_engine.rs","lineNumber":926,"sourceCode":"                    }\n                };\n\n                if let Err(e) = writer.write_all(&chunk).await {\n                    // Remove from active downloads on error\n                    {\n                        let mut active = self.active_downloads.write().await;\n                        active.remove(model_name);\n                    }\n\n                    // Update model status to Missing so retry can work\n                    {\n                        let mut models = self.available_models.write().await;\n                        if let Some(model) = models.get_mut(model_name) {\n                            model.status = ModelStatus::Missing;\n                        }\n                    }\n\n                    return Err(anyhow!(\"Failed to write chunk to file: {}\", e));\n                }\n\n                let chunk_len = chunk.len() as u64;\n                file_downloaded += chunk_len;\n                total_downloaded += chunk_len;\n                bytes_since_last_report += chunk_len;\n\n                // Calculate weighted overall progress based on total bytes downloaded\n                let overall_progress = if total_size_bytes > 0 {\n                    ((total_downloaded as f64 / total_size_bytes as f64) * 100.0).min(99.0) as u8\n                } else {\n                    // Fallback to per-file progress if total size unknown\n                    ((index as f64 + (file_downloaded as f64 / file_total_size.max(1) as f64)) / total_files as f64 * 100.0) as u8\n                };\n\n                // Report every 1% progress change OR every 500ms for smooth UI updates\n                let elapsed_since_report = last_report_time.elapsed();\n                let progress_changed = overall_progress > last_reported_progress;","sourceCodeStart":908,"sourceCodeEnd":944,"githubUrl":"https://github.com/Zackriya-Solutions/meetily/blob/0281737d87d26352fb0adc78c8c0975f691b23d1/frontend/src-tauri/src/parakeet_engine/parakeet_engine.rs#L908-L944","documentation":"Writing a downloaded chunk to the buffered file failed (writer.write_all returned an error). The engine resets the model status to Missing and removes it from active downloads so a retry is possible. The failure is on the local side, so retrying without fixing the disk fails again at the same point.","triggerScenarios":"Disk fills up mid-download (most common with multi-GB GGUF files); permissions on the file or directory change mid-write; the file is deleted or locked by another process during streaming; external storage holding the models dir is unplugged.","commonSituations":"Only a few GB free before starting a 3–5 GB model; user empties the models folder mid-download; cloud-sync clients evicting or locking the file; antivirus quarantining partially written files.","solutions":["Free disk space of at least the model's total size, then retry — resume continues from the partial file","Move the models directory to a volume with more space and re-download","Exclude the models directory from cloud-sync and real-time antivirus during downloads","Pre-check available disk space before starting and fail fast with a clear message"],"exampleFix":"// before\nif let Err(e) = writer.write_all(&chunk).await {\n    return Err(anyhow!(\"Failed to write chunk to file: {}\", e));\n}\n\n// after: fail fast before the download starts\nlet total = model_def.approx_size_bytes;\nlet avail = fs2::free_space(&models_dir)?; // fs2 crate\nif avail < total as u64 + 100 * 1024 * 1024 {\n    return Err(anyhow!(\"Insufficient disk space: need {} MB, have {} MB\", total / 1024 / 1024, avail / 1024 / 1024));\n}","handlingStrategy":"validation","validationCode":"// Check free space before downloading (fs2 crate)\nuse fs2::free_space;\nlet avail = free_space(&models_dir)?;\nif avail < total_size_bytes + 256 * 1024 * 1024 {\n    return Err(anyhow!(\"Not enough disk space: need {} MB, have {} MB\",\n        total_size_bytes / 1024 / 1024, avail / 1024 / 1024));\n}","typeGuard":null,"tryCatchPattern":"match result {\n    Err(e) if e.to_string().starts_with(\"Failed to write chunk to file\") => {\n        alert_disk_or_permissions(); // local-side failure: retrying without a fix fails again\n    }\n    other => other,\n}","preventionTips":["Check free space against the advertised model size before every download","Keep the models directory excluded from sync agents that lock or evict files","Surface a storage indicator in the UI before users pick large models"],"tags":["filesystem","disk-full","download","rust"],"backgroundTag":"disk-write-failed","analyzedSha":"0281737d87d26352fb0adc78c8c0975f691b23d1","analyzedAt":"2026-08-16T20:57:52.567Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}