Unexpected Behavior When Using Cats Effect with ZIO in Scala 3.1 - Resource Management Issues
Can someone help me understand I'm sure I'm missing something obvious here, but I'm sure I'm missing something obvious here, but I'm facing an issue while integrating Cats Effect with ZIO in my Scala 3.1 project... I'm trying to manage resources using the `Resource` type from Cats Effect, but I'm running into unexpected behavior where resources aren’t being released correctly after use. I've created a simple example where I open a database connection and then attempt to fetch some data. Here’s a simplified version of my code: ```scala import cats.effect.{IO, Resource} import zio.{Task, ZIO} import zio.interop.catz.* object Database { def acquireConnection: Resource[IO, Connection] = Resource.make( IO { DriverManager.getConnection("jdbc:h2:mem:") } )(conn => IO { conn.close() }) def fetchData: ZIO[Any, Throwable, List[String]] = for { conn <- ZIO.environment[Connection] result <- ZIO.attempt { val stmt = conn.createStatement() val rs = stmt.executeQuery("SELECT name FROM users") Iterator.continually(rs.next()).takeWhile(identity).map(_ => rs.getString("name")).toList } } yield result } object Main extends App { override def run(args: List[String]): ZIO[zio.ZEnv, Nothing, ExitCode] = { Database.acquireConnection.use { conn => val result = Database.fetchData.provide(conn) result.map(names => println(names)) }.exitCode } } ``` When running this code, I receive the following error message: `java.sql.SQLException: No suitable driver found for jdbc:h2:mem:`. I suspect that the resource is not being managed correctly, leading to the connection not being available when I try to fetch the data. I've tried ensuring that the H2 driver is included in my dependencies, and I also checked that I'm using `zio: 1.0.0` and `cats-effect: 3.2.9`, but I’m still getting the error. I also attempted separating the resource management logic to see if that would change anything, but it didn’t help. Is there a better way to handle this integration? How can I ensure that the resource is properly scoped and available throughout its lifecycle? Any insights on best practices for mixing Cats Effect and ZIO would be greatly appreciated. This is part of a larger API I'm building. Any ideas what could be causing this? I'm working on a web app that needs to handle this. Any ideas what could be causing this? I'm working on a web app that needs to handle this. I'm developing on Ubuntu 22.04 with Scala. Could this be a known issue?