You set server.port=8080 in application.properties and also pass --server.port=9090 as a command line argument, but the app still runs on port 8080. What is the most likely cause?

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Spring Boot - Application Configuration

You set server.port=8080 in application.properties and also pass --server.port=9090 as a command line argument, but the app still runs on port 8080. What is the most likely cause?

Aapplication.properties has higher priority

BSpring Boot ignores command line arguments by default

CEnvironment variable overrides command line

DCommand line argument syntax is incorrect

Step-by-Step Solution

Solution:

Step 1: Understand expected behavior
Command line arguments should override properties file settings.
Step 2: Identify why command line arg might be ignored
If the syntax is wrong (e.g., missing dashes or wrong format), Spring Boot won't apply it.
Final Answer:
Command line argument syntax is incorrect -> Option D
Quick Check:
Incorrect syntax means command line ignored [OK]

Quick Trick: Check command line argument format carefully [OK]

Common Mistakes:

Assuming properties file always overrides command line
Thinking environment variables override command line
Believing Spring Boot ignores command line args by default

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You set server.port=8080 in application.properties and also pass --server.port=9090 as a command line argument, but the app still runs on port 8080. What is the most likely cause?

Step 1: Understand expected behavior

Step 2: Identify why command line arg might be ignored

Final Answer:

Quick Check:

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