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Why might Spring Boot fail to auto-configure a bean even if the dependency is on the classpath?

medium📝 Debug Q7 of 15
Spring Boot - Fundamentals
Why might Spring Boot fail to auto-configure a bean even if the dependency is on the classpath?
AA required property is missing or misconfigured
BSpring Boot never auto-configures beans automatically
CThe dependency version is too new
DAuto-configuration only works with XML files
Step-by-Step Solution
Solution:

  1. Step 1: Understand conditions for auto-configuration

    Auto-configuration requires certain properties to be set; missing or wrong properties prevent bean creation.

  2. Step 2: Eliminate incorrect options

    Spring Boot does auto-configure beans; version issues are rare cause; XML is not required.

  3. Final Answer:

    A required property is missing or misconfigured -> Option A

  4. Quick Check:

    Missing properties block auto-configured beans [OK]
Quick Trick: Check required properties to enable auto-config beans [OK]
Common Mistakes:
  • Believing auto-config never creates beans automatically
  • Assuming version incompatibility is common cause
  • Thinking XML config is mandatory for auto-config

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