connectPool
Deprecated (with error)
Use Database.connect() with a connection pool DataSource instead. This may be removed in future releases.
JDBC driver implementations of ConnectionPoolDataSource are not actual connection pools, but rather a means of obtaining the physical connections to then be used in a connection pool. It is a known issue, with no plans to be fixed, that SQLiteConnectionPoolDataSource, for example, creates a new connection each time instead of retrieving a pooled connection. Other implementations, like PGConnectionPoolDataSource, suggest that a DataSource or a dedicated third-party connection pool library should be used instead.
Please leave a comment on YouTrack with a use-case if your driver implementation requires that this function remain part of the API.
SQLiteConnectionPoolDataSource issue #1011