Getting SQLException: connection is closed with HikariCP

[AlexandreOkita]

Hello! I'm using Ktorm with HikariCP as my DataSource implementation, but sometimes a query randomly fails with the following error:

java.sql.SQLException: Connection is closed
    at com.zaxxer.hikari.pool.ProxyConnection$ClosedConnection.lambda$getClosedConnection$0(ProxyConnection.java:515)
    at jdk.proxy3/jdk.proxy3.$Proxy5.prepareStatement(Unknown Source)
    at com.zaxxer.hikari.pool.ProxyConnection.prepareStatement(ProxyConnection.java:337)
    at com.zaxxer.hikari.pool.HikariProxyConnection.prepareStatement(HikariProxyConnection.java)
    at org.ktorm.database.Database.executeQuery(Database.kt:697)
    at org.ktorm.dsl.Query$rowSet$2.invoke(Query.kt:90)
    at org.ktorm.dsl.Query$rowSet$2.invoke(Query.kt:70)
    at kotlin.UnsafeLazyImpl.getValue(Lazy.kt:81)
    at org.ktorm.dsl.Query.getRowSet(Query.kt)
    at org.ktorm.dsl.Query.iterator(Query.kt:137)

Has anyone had a problem like this or imagine what could be happening? I've already tried to change the hikari settings regarding the number of connections in the pool and also add the keepAlive property, but without success yet.