Hello there! I installed ktor plugin, started my first hello world ktor server and it works fine if I run it from IDE. Then I build a jar, but got "no main manifest attribute in hello.jar" when try to run it.

Are you using Gradle to generate the JAR file? The documentation suggests to use the ShadowJar plugin which works without messing with Jar Manifest. https://ktor.io/servers/deploy/packing/fatjar.html

You need

application

plugin for that, it mentioned on docs shared by Lucas

Thanks! I will try it

Have you used ktor plugin to create the project? application plugin is added by default by ktor project generator

@cy Yes, i used ktor plugin for IDEA