Ktor app is not running inside Kotlin Multiplatform Project using IntelliJ IDEA

Question

I'm trying to configure a Kotlin Multiplatform Project with Android and Ktor modules in it. After configuration, running the Ktor app fails with this message:

/usr/lib/jvm/java-8-openjdk-amd64/bin/java -javaagent:/home/lenqnr/intellij-idea/lib/idea_rt.jar=44331:/home/lenqnr/intellij-idea/bin -Dfile.encoding=UTF-8 -classpath /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/charsets.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/cldrdata.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/dnsns.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/icedtea-sound.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/jaccess.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/java-atk-wrapper.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/localedata.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/nashorn.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/sunec.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/zipfs.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/jce.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/jsse.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/management-agent.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/resources.jar:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/rt.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-server-netty/1.2.2/86f06a652bf2859236835e802cd81dc884a72c61/ktor-server-netty-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-server-host-common/1.2.2/80e62a4dab4e116aeb50e8017838b83836764bf9/ktor-server-host-common-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-server-core/1.2.2/37ba2773c666ff3f9f35a6d5949b8b8c2edd6adf/ktor-server-core-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-http-cio-jvm/1.2.2/22659690f735fa439b4f91b83ef846e3ec7dedf1/ktor-http-cio-jvm-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-http-jvm/1.2.2/1381ef340b58a3287f1da884b9db7280466c67ff/ktor-http-jvm-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-network/1.2.2/e8b2d5f46acfc25d7e893dde14f8da41ab28b7fd/ktor-network-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-utils-jvm/1.2.2/7c51add50945d74c07926e11acd33b66295903c8/ktor-utils-jvm-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.40/2d1d0a2f27fd060787075c69113846803fc27734/kotlin-stdlib-jdk8-1.3.40.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-classic/1.2.1/706a8b8206ead3683ec639dd270d11fd948fbb0e/logback-classic-1.2.1.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.40/2995de8f68444ad47f29e7b59962ac31e6301d7e/kotlin-stdlib-jdk7-1.3.40.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-io-jvm/0.1.10/ec98e487d8c710126001c4f3086e4a0b9c0d3179/kotlinx-coroutines-io-jvm-0.1.10.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-io-jvm/0.1.10/74f179ae134d78ad360770801807c7078e71885/kotlinx-io-jvm-0.1.10.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-jdk8/1.2.2/71653b85af2fe6baeb5314c2863dffe7aac8068a/kotlinx-coroutines-jdk8-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-core/1.2.2/6ff48bdfc38a8c22e3fc37605b6a6afaed3b6dbd/kotlinx-coroutines-core-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/1.3.40/f2f8357e000fd80d8d799110f012b86fd4637386/kotlin-reflect-1.3.40.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.40/b8a521c687329303778548e2f09b0ba5b2665236/kotlin-stdlib-1.3.40.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/atomicfu/0.12.9/5cee16643956d76c52c7ef345448b0990b6e1e04/atomicfu-0.12.9.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-api/1.7.25/da76ca59f6a57ee3102f8f9bd9cee742973efa8a/slf4j-api-1.7.25.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/com.typesafe/config/1.3.1/2cf7a6cc79732e3bdf1647d7404279900ca63eb0/config-1.3.1.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-codec-http2/4.1.36.Final/ed198d8a5283910b0c062a50dd28ef4688dcb2a5/netty-codec-http2-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.eclipse.jetty.alpn/alpn-api/1.1.3.v20160715/a1bf3a937f91b4c953acd13e8c9552347adc2198/alpn-api-1.1.3.v20160715.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-transport-native-kqueue/4.1.36.Final/a2c6883a0f2e0adc15e6d764ced0ef044e2311c7/netty-transport-native-kqueue-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-transport-native-epoll/4.1.36.Final/5eb8b3ad0a99a16e5ae492da27544b1143e00606/netty-transport-native-epoll-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-core/1.2.1/378913dfc3c6c71e7e2a2853eff2c3e8ac27599/logback-core-1.2.1.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-io/0.1.10/798b764e7f9396e63eb263a83c0385686d69f3e0/kotlinx-coroutines-io-0.1.10.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-io/0.1.10/c407b4bf931379824cf002f110df028cfe18c87c/kotlinx-io-0.1.10.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-core-common/1.2.2/8b54928fbb813408684911eb27d6afeb23c92a4b/kotlinx-coroutines-core-common-1.2.2.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.40/ff8f3da514fc2877d1303d55e22d6da8156c29fb/kotlin-stdlib-common-1.3.40.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains/annotations/13.0/919f0dfe192fb4e063e7dacadee7f8bb9a2672a9/annotations-13.0.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/atomicfu-common/0.12.9/ba80bc10a440ea504b5cebd262becf9870e309c3/atomicfu-common-0.12.9.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-codec-http/4.1.36.Final/62b73d439dbddf3c0dde092b048580139695ab46/netty-codec-http-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-handler/4.1.36.Final/1c38a5920a10c01b1cce4cdc964447ec76abf1b5/netty-handler-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-codec/4.1.36.Final/8462116d327bb3d1ec24258071f2e7345a73dbfc/netty-codec-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-transport-native-unix-common/4.1.36.Final/d95d7033f400f9472db9da7834c443b96cd4bab0/netty-transport-native-unix-common-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-transport/4.1.36.Final/8546e6be47be587acab86bbd106ca023678f07d9/netty-transport-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-buffer/4.1.36.Final/7f2db0921dd57df4db076229830ab09bba713aeb/netty-buffer-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-resolver/4.1.36.Final/e4d243fbf4e6837fa294f892bf97149e18129100/netty-resolver-4.1.36.Final.jar:/home/lenqnr/.gradle/caches/modules-2/files-2.1/io.netty/netty-common/4.1.36.Final/f6f38fde652a70ea579897edc80e52353e487ae6/netty-common-4.1.36.Final.jar ApplicationKt
Error: Could not find or load main class ApplicationKt

Process finished with exit code 1

I noticed the module's output path is not included in the -classpath option. How should I fix it?

Here's what I did:

1. Create new Gradle project with no additional libraries and frameworks using IntelliJ IDEA
2. Add new Android module
3. Add new Multiplatform module
4. Add new Ktor module
5. Define main method as shown in the Ktor quick start

If you follow these steps, then I'm pretty sure you'll face the same problem. I'm working on Ubuntu 18.04 just in case.

project structure:

hello
├── android
├── common
├── server
│   ├── resources
│   └── src
│       └── Application.kt
├── build.gradle
└── settings.gradle

settings.gradle in root project:

include ':android', ':common', ':server'

build.gradle in root project:

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.1")
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.40")
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

Answer 1

It seems like a bug, not just a problem. I found a temporary workaround from JetBrains issue tracker.

In IntelliJ IDEA, Go to "Settings / Build, Execution, Deployment / Build Tools / Gradle / Runner" and check the "Delegate IDE build/run actions to Gradle" option as true and it'll work correctly.