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After running gunicorn -w 3 myapp:app, Gunicorn immediately exits with an error. Which is the most probable reason?

medium📝 Debug Q6 of 15
Flask - Performance Optimization
After running gunicorn -w 3 myapp:app, Gunicorn immediately exits with an error. Which is the most probable reason?
AGunicorn requires at least 5 workers to run
BThe <code>myapp</code> module or <code>app</code> object cannot be found or imported
CThe port number is missing in the command
DGunicorn does not support multiple workers
Step-by-Step Solution
Solution:

  1. Step 1: Check module and app import

    Gunicorn expects a valid Python module and WSGI app object; if not found, it exits with error.

  2. Step 2: Verify command syntax

    Number of workers and port are optional; missing port defaults to 8000.

  3. Final Answer:

    The myapp module or app object cannot be found or imported -> Option B

  4. Quick Check:

    Import errors cause immediate exit [OK]
Quick Trick: Check module and app import errors first [OK]
Common Mistakes:
MISTAKES
  • Assuming port is mandatory
  • Believing Gunicorn needs minimum 5 workers
  • Ignoring import errors

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