[Solved] A Spring Boot application fails to start due to a database connection error. The application.properties file has:spring.datasource.url=jdbc:mysql://localhost:3306/mydb spring.datasource.... | Spring Boot

Spring Boot - Docker and Deployment

A Spring Boot application fails to start due to a database connection error. The application.properties file has:

spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=root
spring.datasource.password=wrongpass

What is the most likely fix?

ARemove the <code>spring.datasource.url</code> property

BChange the database port to 8080

CAdd <code>@EnableJpaRepositories</code> annotation to main class

DCorrect the database password in <code>application.properties</code>

Step-by-Step Solution

Solution:

Step 1: Identify cause of connection failure
Incorrect password causes authentication failure to the database.
Step 2: Apply fix by correcting password
Updating the password to the correct one in application.properties resolves the issue.
Final Answer:
Correct the database password in application.properties -> Option D
Quick Check:
DB connection error = wrong password fix [OK]

Quick Trick: Check DB credentials in properties file [OK]

Common Mistakes:

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