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Scala SBT is not able to download dependencies

I am new to Scala and Akka. I have created a new project and below is my build.sbt file.

name := "akka_essentials"

version := "0.1"

scalaVersion := "2.13.4"

val akkaVersion = "2.5.13"

libraryDependencies ++= Seq(
  "com.typesafe.akka" %% "akka-actor" % akkaVersion,
  "com.typesafe.akka" %% "akka-testkit" % akkaVersion,
  "com.scalatest" %% "scalatest" % "3.0.5"
)

The sbt tool is not able to download dependencies. The error log is as below:

[error] stack trace is suppressed; run 'last update' for the full output
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.akka:akka-testkit_2.13:2.5.13
[error]   Not found
[error]   Not found
[error]   not found: C:\Users\Anand\.ivy2\local\com.typesafe.akka\akka-testkit_2.13\2.5.13\ivys\ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/akka/akka-testkit_2.13/2.5.13/akka-testkit_2.13-2.5.13.pom
[error] Error downloading com.scalatest:scalatest_2.13:3.0.5
[error]   Not found
[error]   Not found
[error]   not found: C:\Users\Anand\.ivy2\local\com.scalatest\scalatest_2.13\3.0.5\ivys\ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/scalatest/scalatest_2.13/3.0.5/scalatest_2.13-3.0.5.pom
[error] Error downloading com.typesafe.akka:akka-actor_2.13:2.5.13
[error]   Not found
[error]   Not found
[error]   not found: C:\Users\Anand\.ivy2\local\com.typesafe.akka\akka-actor_2.13\2.5.13\ivys\ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/akka/akka-actor_2.13/2.5.13/akka-actor_2.13-2.5.13.pom

I am very new to Scala. I have not defined anything like ivy.xml. I am from Java background and generally use Gradle. How can I resolve this?

Solution

  • Akka 2.5.13 has not been cross published for Scala 2.13 as you can check on Maven.

    The earliest version supporting 2.13 (release, not milestone or RC) is 2.5.23. You can see the version matrix for Actors here.

    So you need to use newer Akka or older Scala.

    With Scalatest you used wrong organization. It's "org.scalatest" not "com.scalatest".

    If you have doubts about dependency resoultion check Maven first.