testcontainers, hikari and Failed to validate connection org.postgresql.jdbc.PgConnection

Question

I have a spring boot app. I'm testing it with testcontainers to ensure that the DB (postgres) and the Repository implementation do what they are supposed to do.

I initialise the container with the following and works pretty well.

    @Container
    @SuppressWarnings("rawtypes")
    private static final PostgreSQLContainer POSTGRE_SQL = new PostgreSQLContainer("postgres:9.6")
        .withDatabaseName("xxx")
        .withUsername("xxx")
        .withPassword("xxx");

    static class Initialiser implements ApplicationContextInitializer<ConfigurableApplicationContext> {
        @Override
        public void initialize(ConfigurableApplicationContext applicationContext) {
            TestPropertyValues.of(
                "spring.datasource.url=" + POSTGRE_SQL.getJdbcUrl(),
                "spring.datasource.username=" + POSTGRE_SQL.getUsername(),
                "spring.jpa.hibernate.ddl-auto=create-drop"
            ).applyTo(applicationContext.getEnvironment());
        }
    }

The problem is that while the tests are successful, at the end of the class, when the container gets shutdown I get the following error messages from hikari

[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@4d728138 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@43070a2e (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@1aa53837 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@3d7cffa2 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@634e7d8e (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@18634db3 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@2bb4ba08 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@71efd133 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@61dd608d (This connection has been closed.). Possibly consider using a shorter maxLifetime value.
[31mWARN [0;39m [36mcom.zaxxer.hikari.pool.PoolBase.isConnectionAlive[0;39m - HikariPool-1 - Failed to validate connection org.postgresql.jdbc.PgConnection@6351b7d0 (This connection has been closed.). Possibly consider using a shorter maxLifetime value.

They are not making my test failing and i suspect it happens because the container, and therefore the db, is no longer there and hikari still tries to keep the connection pool alive. so the test to complete takes several seconds while hikari officially complain of failing connection.

I tried playing with, settings hikari properties in the Initialiser like "spring.datasource.hikari.maxLifetime=1" and "spring.datasource.hikari.idleTimeout=1" without any luck.

Any suggestions?

Thank you

Answer 1

I had the exact same problem: test passed if I run it individually, but failed when I run it together with other tests.

I found that SpringBootTest is reusing Spring context between tests so there is a common Hikari Pool between tests. But in the background testcontainers killed (after the previous test) a container and created a new one (before the next test). SpringBootTest is not aware of that change resulting in a new Postgres container so Hikari Pool is the same as in the previous test (pointing to already used and currently unavailable port)

In my case adding @DirtiesContext annotation to test helped.