{"record":{"id":"5f7fbfe099e4c042","repo":"flxzt/rnote","slug":"timeout-reached","errorCode":null,"errorMessage":"Timeout reached","messagePattern":"Timeout reached","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/rnote-cli/src/thumbnail.rs","lineNumber":39,"sourceCode":"    let mut rnote_file_bytes = vec![];\n\n    let mut fh = File::open(rnote_file).await?;\n    fh.read_to_end(&mut rnote_file_bytes).await?;\n    let engine_snapshot = EngineSnapshot::load_from_rnote_bytes(rnote_file_bytes).await?;\n\n    // We dont care about the return values of these functions\n    let _ = engine.load_snapshot(engine_snapshot);\n    let mut timeout = if let Some(timeout) = timeout {\n        Timer::after(timeout).fuse()\n    } else {\n        Timer::never().fuse()\n    };\n    let mut export_op = engine\n        .generate_thumbnail(size, SelectionExportFormat::Png)\n        .fuse();\n    let export_bytes = select! {\n        res = export_op => res??.context(\"Generating thumbnail failed, empty document.\")?,\n        _ = timeout => return Err(anyhow!(\"Timeout reached\"))\n    };\n    let mut fh = File::create(output).await?;\n    fh.write_all(&export_bytes).await?;\n    fh.sync_all().await?;\n\n    Ok(())\n}\n","sourceCodeStart":21,"sourceCodeEnd":47,"githubUrl":"https://github.com/flxzt/rnote/blob/bbc5354502ba2fc83eec2670b535348825e679a6/crates/rnote-cli/src/thumbnail.rs#L21-L47","documentation":"run_thumbnail aborted because generating the thumbnail did not complete before the configured timeout elapsed. The engine's generate_thumbnail future is raced with a timeout via futures::select!, and the timeout branch returns this error.","triggerScenarios":"Generating a thumbnail for a very large or pathologically complex document where the render takes longer than the timeout duration, or a stalled engine task.","commonSituations":"Huge .rnote files with thousands of strokes; running on very slow/loaded machines or in CI where rendering is slow.","solutions":["Increase the thumbnail timeout (if configurable) or generate at a smaller size","Pre-load the document and check stroke count before exporting thumbnails; skip or batch huge documents","Retry once; if reproducible, profile the document and simplify it (e.g. flatten/split content)"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"let meta = std::fs::metadata(rnote_file)?;\nif meta.len() > 100 * 1024 * 1024 {\n    eprintln!(\"Document too large for quick thumbnail; expect timeout\");\n}","typeGuard":null,"tryCatchPattern":"match result {\n    Err(e) if e.to_string().contains(\"Timeout reached\") => {\n        eprintln!(\"Thumbnail generation timed out; try smaller size or skip preview\");\n        // fall back to a placeholder thumbnail\n    }\n    other => other,\n}","preventionTips":["Use modest thumbnail sizes for very large documents","Skip thumbnail generation for huge files detected by size","Run in retry logic and surface a placeholder instead of failing hard"],"tags":["timeout","thumbnail","performance"],"backgroundTag":"request-timeout","analyzedSha":"bbc5354502ba2fc83eec2670b535348825e679a6","analyzedAt":"2026-09-08T13:20:33.747Z","contentChangedAt":"2026-09-08T13:20:33.747Z","schemaVersion":2},"datasetVersion":"2026-09-16T09:17:16.951Z"}