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SBT SCALA java.lang.ClassNotFoundException: javax.mail.Authenticator – Apache

I have SBT Scala project who sends emails with some information to users. Everything works fine using IntelliJ to run it, but I need to build the project, put on the server and run from terminal.

In the first step I use below command to build the project:

sbt clean compile package

after that I try to run it by:

scala target/scala-2.12/project_name_sbt_2.12-0.1.jar

then I got error:

java.lang.ClassNotFoundException: javax.mail.Authenticator
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

It is command line app, I don’t use Tomcat and other containers. Construction is simple and easy. I have a main class like:

object MyApp extends App {new SomeService().run()}

I have build.sbt like:

libraryDependencies ++= Seq(
          "org.scalatest" %% "scalatest" % "3.0.5" % "test",
          "mysql" % "mysql-connector-java" % "5.1.16",
          "org.jsoup" % "jsoup" % "1.11.2",
          "joda-time" % "joda-time" % "2.10.1",
          "org.apache.commons" % "commons-email" % "1.5"
        )

Could you point me to the right direction to resolve that issue? What’s wrong?

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2

Answers


  1. Chosen as BEST ANSWER
    0

    Thanks for Markus Appel, Luis Miguel Mejia Suarez, and Mahmoud Hanafy. As you recommended I used assembly and it works fine for me.


  2. 0

    I usually use this plugin to create the jar.
    Try to add it to your plugins.sbt file

    and run this command to create the jar:

    sbt "set test in assembly := {}" assembly

    and then try to run your jar again.

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