PUZZLEEASY

Week 6 Capstone - ModuleNotFoundError on Startup

The TaskFlow API service won't stay up — journalctl shows ModuleNotFoundError for package `app`. Get /health responding again.

30 minutes
python
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Puzzle Overview

Deploy night shipped a small TaskFlow health API as a Python package under /opt/taskflow-api. The systemd unit starts it with `python3 -m app.main`, but the service crash-loops with ModuleNotFoundError: No module named 'app'.

Your job: investigate the unit and environment, fix the import path problem, and bring the service back so http://127.0.0.1:8000/health returns OK.

Skills tested: reading systemd journals, understanding WorkingDirectory and PYTHONPATH, running Python packages as modules.

Technologies Covered

pythonsystemdmodulestroubleshootingpuzzle

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