How to replace default hikari cp to tomcat pool on spring boot 2.0

Question

I have migrated spring boot application to 2.0 and found out some problems with hikari connection pool. When I am fetching database data this results to hikari cp timeout ie. co

Answer 1

Since Spring Boot 2.0 release, spring-boot-starter-jdbc and spring-boot-starter-data-jpa resolve HikariCP dependency by default and spring.datasource.type property has HikariDataSource as default value.So if u have both dependency in your application you should exclude it from both like below.

implementation('org.springframework.boot:spring-boot-starter-data-jpa') {
    exclude group: 'com.zaxxer', module: 'HikariCP'
}
implementation('org.springframework.boot:spring-boot-starter-jdbc') {
    exclude group: 'com.zaxxer', module: 'HikariCP'
}

After that you can configure other pooling technologies that u likes to use, like below . In your application.yml file :

spring:
   datasource:
     type: org.apache.tomcat.jdbc.pool.DataSource

In dependency :

implementation('org.apache.tomcat:tomcat-jdbc')