log551 B
Node.js Stack Trace (log)
A realistic Node.js/Express stack trace — a TypeError with V8-style 'at function (file:line:col)' frames including an async frame and internal node: frames. A fixture for testing JS stack-trace parsers.
Preview — first 9 lineslog
TypeError: Cannot read properties of undefined (reading 'email')
at notifyCustomer (/srv/app/services/order.js:142:31)
at placeOrder (/srv/app/services/order.js:88:5)
at OrderController.create (/srv/app/controllers/order.js:54:20)
at Layer.handle [as handle_request] (/srv/app/node_modules/express/lib/router/layer.js:95:5)
at next (/srv/app/node_modules/express/lib/router/route.js:144:13)
at processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Server.<anonymous> (/srv/app/server.js:29:3)
Specifications
- Language
- Node.js
- Exception
- TypeError
- Frames
- 7
- Has Async
- true
What is a .log file?
LOG files are plain-text records of events emitted by software, typically one entry per line with a timestamp, severity, and message. There is no single standard, so formats range from unstructured text to structured JSON lines. They are central to debugging, monitoring, and auditing.
How to use this file
Use an example LOG file to test log parsers, timestamp and severity extraction, line-oriented streaming, and ingestion into monitoring or analysis pipelines.
Related files
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Generated by generation/data_logs.py. Free for any use, no attribution required — license.