Problems running akka-http using Kotlin #1168

Gabology · 2017-05-29T11:55:25Z

Attempting to write tests using Maven is yielding the following error:

java.lang.NoClassDefFoundError: org/scalactic/TripleEqualsSupport$class

	at akka.http.javadsl.testkit.JUnitRouteTestBase.<init>(JUnitRouteTest.scala:24)
	at akka.http.javadsl.testkit.JUnitRouteTest.<init>(JUnitRouteTest.scala:54)
	at AppTest.<init>(AppTest.kt:11)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
	at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.ClassNotFoundException: org.scalactic.TripleEqualsSupport$class
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
...

Minimal code to reproduce is as follows:

class AppTest : JUnitRouteTest() {
    private val appRoute : TestRoute = testRoute(App.route())
}

I have added both scalatest_2.12 and junit as test dependencies. Running mvn clean does not seem to have have helped.

The text was updated successfully, but these errors were encountered:

ktoso · 2017-05-29T11:56:59Z

Please show your dependencies section

Gabology · 2017-05-29T11:58:11Z

Dependecies

   <dependencies>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jre8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-http-core_2.11</artifactId>
            <version>10.0.6</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-http_2.11</artifactId>
            <version>10.0.6</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-parsing_2.11</artifactId>
            <version>10.0.6</version>
        </dependency>
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_2.12</artifactId>
            <version>3.0.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-http-testkit_2.11</artifactId>
            <version>10.0.6</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-test-junit</artifactId>
            <version>${kotlin.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

ktoso · 2017-05-29T12:00:14Z

The scala major version must match for all artifacts (that's the major one released every few years).

You said you included scalatest_2.12 but you're using Akka 2.11. Use all artifacts from 2.12.
Put it in a variable: scala.version and add it to all artifact names like <artifactId>akka-http-testkit_${scala.binary.version}</artifactId>

Gabology · 2017-05-29T12:07:16Z

@ktoso Thanks, however now this error being produced instead:

java.lang.UnsupportedOperationException: empty.reduceLeft

	at scala.collection.TraversableOnce.reduceLeft(TraversableOnce.scala:180)
	at scala.collection.TraversableOnce.reduceLeft$(TraversableOnce.scala:178)
	at scala.collection.mutable.ArrayBuffer.scala$collection$IndexedSeqOptimized$$super$reduceLeft(ArrayBuffer.scala:48)
	at scala.collection.IndexedSeqOptimized.reduceLeft(IndexedSeqOptimized.scala:56)
	at scala.collection.IndexedSeqOptimized.reduceLeft$(IndexedSeqOptimized.scala:72)
	at scala.collection.mutable.ArrayBuffer.reduceLeft(ArrayBuffer.scala:48)
	at scala.collection.TraversableOnce.reduce(TraversableOnce.scala:208)
	at scala.collection.TraversableOnce.reduce$(TraversableOnce.scala:208)
	at scala.collection.AbstractTraversable.reduce(Traversable.scala:104)
	at akka.http.javadsl.server.directives.RouteDirectives.route(RouteDirectives.scala:46)
	at akka.http.javadsl.server.directives.RouteDirectives.route(RouteDirectives.scala:43)
	at AppTest.<init>(AppTest.kt:12)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
	at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

jrudolph · 2017-05-29T15:02:11Z

That means that your route has somewhere a part like this: route() with zero arguments. We should improve the error message or even better make it illegal to use it like this. I'll create another ticket for that.

jrudolph · 2017-05-29T15:06:39Z

I created #1170 to track the route issue. I'll close this one for now as the maven problem seems to be solved.

Gabology · 2017-05-29T15:13:06Z

@jrudolph I don't see how that is the case here, I tried it with the most minimal path and I'm still getting the same error.

object App : HttpApp() {
    override fun route() : Route = route(
        path("/hello", { get { complete("Hello from Akka HTTP!") } })
    )
}

fun main(args: Array<String>) {
    App.startServer("0.0.0.0", 8080)
}

jlprat · 2017-05-29T16:18:19Z

maybe some name clashing with both route methods?
Does it happen as well on 10.0.7? Note the method to override on HttpApp is routes then.

jrudolph · 2017-05-29T17:11:43Z

@OverlyExcessive interesting maybe it's some kotlin incompatibility? Can you post a complete example somewhere including all instructions how to build? E.g. maven would be great. Let's use this ticket to fix that problem.

Gabology · 2017-05-30T07:39:14Z

@jlprat

Omitting route and just leaving it with a single path directive produces the same error so alas this does not seem to be the case.

@jrudolph

I uploaded a minimal example to a repository here. You can build it running mvn test.

Thanks for your diligence in this.

raboof · 2017-05-30T08:17:26Z

HttpApp extends RouteDirectives, and it seems App.route() in your test is calling RouteDirectives.route() instead of the route() in your App because the latter is protected rather than public.

That's indeed quite confusing, luckily in 10.0.7 we've renamed HttpApp.route to HttpApp.routes, removing this confusion.

After this change mvn still complains about the main method, but that probably has nothing to do with akka-http :).

Gabology · 2017-05-30T11:07:46Z

@raboof Yep that seems to have fixed it. Thanks!

jrudolph · 2017-05-30T11:32:03Z

Thanks for checking, @raboof, I didn't see that AppTest was posted before.

jrudolph mentioned this issue May 29, 2017

Javadsl RouteDirectives.route() with no args will throw java.lang.UnsupportedOperationException: empty.reduceLeft #1170

Closed

jrudolph closed this as completed May 29, 2017

jrudolph changed the title ~~NoClassDefFoundError on w/ Maven~~ Problems running akka-http using Kotlin May 29, 2017

jrudolph reopened this May 29, 2017

jrudolph added 0 - new Ticket is unclear on it's purpose or if it is valid or not t:java Issues related to the Java DSL t:routing Issues related to the routing DSL labels May 29, 2017

Gabology closed this as completed May 30, 2017

jlprat mentioned this issue Jul 10, 2018

Add new method for routes chaining in Java DSL (#1170) #2100

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Problems running akka-http using Kotlin #1168

Problems running akka-http using Kotlin #1168

Gabology commented May 29, 2017

ktoso commented May 29, 2017

Gabology commented May 29, 2017

ktoso commented May 29, 2017 •

edited

Gabology commented May 29, 2017

jrudolph commented May 29, 2017

jrudolph commented May 29, 2017

Gabology commented May 29, 2017

jlprat commented May 29, 2017

jrudolph commented May 29, 2017

Gabology commented May 30, 2017 •

edited

raboof commented May 30, 2017 •

edited

Gabology commented May 30, 2017

jrudolph commented May 30, 2017

Problems running akka-http using Kotlin #1168

Problems running akka-http using Kotlin #1168

Comments

Gabology commented May 29, 2017

ktoso commented May 29, 2017

Gabology commented May 29, 2017

ktoso commented May 29, 2017 • edited

Gabology commented May 29, 2017

jrudolph commented May 29, 2017

jrudolph commented May 29, 2017

Gabology commented May 29, 2017

jlprat commented May 29, 2017

jrudolph commented May 29, 2017

Gabology commented May 30, 2017 • edited

raboof commented May 30, 2017 • edited

Gabology commented May 30, 2017

jrudolph commented May 30, 2017

ktoso commented May 29, 2017 •

edited

Gabology commented May 30, 2017 •

edited

raboof commented May 30, 2017 •

edited