What the data for this category looks like
Daily documents in the highway maintenance and road property rights management field include maintenance plans, patrol logs, defect disposal forms, road construction permits, road damage compensation forms, and more. Data sources cover highway maintenance management systems, bridge and tunnel monitoring systems, road patrol systems, and traffic flow monitoring data. Document formats are mostly structured tables exported from systems, scanned PDFs, and office documents. Fields include section identifiers, facility status parameters, approval numbers, disposal process nodes, and more. Update frequency is mostly daily. Batch-processed daily documents have a wide range of page counts, from single-page single-disposal forms to hundred-page quarterly maintenance plans.
What constraints do these characteristics impose on the document parsing and chunking link
The parsing link must support multiple file types and structural complexity to handle multi-source and heterogeneous document formats, avoiding loss of core business fields or format confusion. High-frequency daily updated data requires support for batch parsing. Chunking rules must adapt to the chapter structure of different documents, and cannot rely solely on fixed character length splitting. Otherwise, the parsing process will split apart the business context of a single patrol log or construction permit. The wide page count range of single documents, from single-page disposal forms to hundreds-page summary plans, creates differentiated requirements for parsing time limits and concurrent processing capabilities. The system must retain contextual association of core business fields such as section numbers and defect types, to avoid losing the ability to link to the corresponding section's maintenance information after chunking.
How to set configurations
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Matches the paragraph length of daily maintenance documents, to avoid splitting core business fields and their context |
chunkSplitter | Split by paragraph + heading | Adapts to the structured chapters of maintenance plans and patrol logs, retains complete logic of approval processes and disposal steps |
customPdfParse | Enable pdf-marker adaptation | Handles non-text-only PDF documents such as scanned patrol logs and multi-page road construction permits |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Accommodates hundreds-page defect disposal summary documents, avoids parsing timeout interruptions for large files |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports bulk import of large-capacity documents such as quarterly maintenance plans and annual road property statistics |
chunkSettingMode | Manual configuration | Adjusts chunking rules individually for different document types, adapts to structural differences between patrol logs and construction permits |
Three common misconfigurations
- Symptom: An error appears when doc2x parses a hundreds-page PDF file, while documents with tens of pages parse normally. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted. The parsing time of large files exceeds the default threshold, triggering parsing interruption. - Symptom: After enabling pdf-marker, parsing large files hangs with no return result. Cause: No concurrent parsing queuing mechanism is configured. When multiple large documents are submitted simultaneously, the system's carrying capacity is exceeded, causing parsing tasks to block.
- Symptom: The file parsing function fails after deploying FastGPT locally. Cause: The environment variables required by the parsing engine are not configured correctly, or the corresponding parsing service is not started, preventing the document parsing process from triggering normally.
How to confirm the configuration is properly set
- Upload a single 200-page PDF maintenance plan document, check that the parsing time is within the configured
PARSE_FILE_TIMEOUT_SECONDSrange, with no timeout interruptions. - Bulk upload multiple documents of different formats, including Excel-format patrol logs, scanned defect disposal forms, and Word-format road construction permits, confirm that the parsing results have no missing fields or content truncation.
- View the parsing logs, confirm that the
customPdfParseandchunkSplitterconfiguration parameters have taken effect as set, with no overwriting by default parameters. - Test uploading a document larger than 100MB, confirm that
UPLOAD_FILE_MAX_SIZEhas been adjusted to a suitable value, and that upload and parsing can be completed normally.
The values provided here are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.