Not able to set keepAliveTime config for Hikari in SpringBoot - postgresql

Question

I have an spring-boot based application that connects to postgres DB. It uses the default HikariCP as JDBC connection pool. From the documentation I see that we can configure a property keepALiveTime which I think is useful to us but I am not able to set it in my yml file. It looks like this
datasource:
jdbc-url: jdbc:postgresql://x.x.x.x:5433/xxx?sslmode=require&sslcert=/file.crt&sslkey=/tmp/file.key
username: ${JDBC_USERNAME}
password: ${JDBC_PASSWORD}
keepaliveTime: 80000
jpa:
hibernate:
ddl-auto: update
show-sql: true
properties:
hibernate.format_sql: true
hibernate.dialect: org.hibernate.dialect.PostgreSQL81Dialect
hikari:
idle-timeout: 500000
minimum-idle: 10
maximum-pool-size: 15
keepaliveTime: 80000
max-lifetime: 48000
connection-timeout: 180000
All other configs are auto suggested and are able to be used. But keepAliveTime option is not available for me to populate. Although I am providing it in the configs Hikari doesn't use it.

Answer 1

keepAliveTime parameter arrived in HikariCP 4.0.0. In order to use it with older version of spring boot - we can exclude the HikariCP dependency from where it is being read and explicitly the version that we want. Its not recommended but I found no issues using 4.0.0 version with spring boot version 2.3.0-Release
To remove the dependency
implementation('org.springframework.boot:spring-boot-starter-data-jpa') {
exclude group: 'com.zaxxer', module: 'HikariCP'
}
To add the dependency
implementation('com.zaxxer:HikariCP:4.0.3') {
force=true
}
I added the keepAliveTime in DataSource Configuration file
public HikariDataSource dataSource() {
HikariDataSource h = DataSourceBuilder.create().type(HikariDataSource.class).build();
System.out.println(h.getJdbcUrl());
h.setKeepaliveTime(100000l);
h.setJdbcUrl("yufuyfuyfu");
System.out.println(h.getJdbcUrl());
return h;
}

Answer 2

please notice that keepAliveTime should be less than maxLifeTime, from HikariCP docs:
This property controls how frequently HikariCP will attempt to keep a connection alive, in order to prevent it from being timed out by the database or network infrastructure. This value must be less than the maxLifetime value