Not able to remove Hikari from Spring Boot project - spring-boot

Question

Initially I added Hikari datasource in my project, but later I wanted to use JPA so i removed the dependencies from pom.xml. Now i'm using JPA. But when i start the project I see the logs which shows that Hikari pool started....
Here are the logs
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.7.5)
2022-11-07 03:57:53.329 INFO 18072 --- [ main] com.example.demo.BookControllerTests : Starting BookControllerTests using Java 17.0.3 on Mahesh-PC with PID 18072 (started by v-mashelke in C:\Users\v-mashelke\Documents\workspace-spring-tool-suite-4-4.15.2.RELEASE\junit-rest-api-application)
2022-11-07 03:57:53.330 INFO 18072 --- [ main] com.example.demo.BookControllerTests : No active profile set, falling back to 1 default profile: "default"
2022-11-07 03:57:53.820 INFO 18072 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-11-07 03:57:53.874 INFO 18072 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 43 ms. Found 1 JPA repository interfaces.
2022-11-07 03:57:54.409 INFO 18072 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-11-07 03:57:54.898 INFO 18072 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-11-07 03:57:54.969 INFO 18072 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-11-07 03:57:55.030 INFO 18072 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.12.Final
2022-11-07 03:57:55.103 INFO 18072 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-11-07 03:57:55.281 INFO 18072 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2022-11-07 03:57:55.633 INFO 18072 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-11-07 03:57:55.643 INFO 18072 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-11-07 03:57:56.166 WARN 18072 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2022-11-07 03:57:56.703 INFO 18072 --- [ main] com.example.demo.BookControllerTests : Started BookControllerTests in 3.609 seconds (JVM running for 5.396)
application.properties file
spring.jpa.dataplatform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa-show-sql=true
spring.datasource.url=jdbc:mysql://localhost:3306/neon
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.5</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>junit-rest-api-application</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>junit-rest-api-application</name>
<description>Spring Security using JWT</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mockito/mockito-core -->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hamcrest/hamcrest -->
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest</artifactId>
<version>2.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
why the Hikari is still present ?

Answer 1

Spring boot by default uses Hikari implementation for data source connection pool. You have dependency for spring-boot-starter-data-jpa, so that is where it is coming from.