Kotlin – NoClassDefFoundError when using exposed

I use exposed as my database library. When I try to run my code, I encounter these errors:

Exception in thread "main" java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
    at org.jetbrains.exposed.sql.Table.clone(Table.kt:196)
    at org.jetbrains.exposed.sql.Table.cloneWithAutoInc(Table.kt:234)
    at org.jetbrains.exposed.sql.Table.autoIncrement(Table.kt:238)
    at org.jetbrains.exposed.sql.Table.autoIncrement$default(Table.kt:238)
    at vanilla.jubeatbook.data.songs.<init>(sqlObjects.kt:14)
    at vanilla.jubeatbook.data.songs.<clinit>(sqlObjects.kt:13)
    at vanilla.jubeatbook.backend.MainKt$main$1.invoke(Main.kt:22)
    at vanilla.jubeatbook.backend.MainKt$main$1.invoke(Main.kt)
    at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.inTopLevelTransaction(ThreadLocalTransactionManager.kt:70)
    at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.transaction(ThreadLocalTransactionManager.kt:58)
    at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.transaction(ThreadLocalTransactionManager.kt:49)
    at vanilla.jubeatbook.backend.MainKt.main(Main.kt:21)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: kotlin.reflect.full.KClasses
    at java.net.urlclassloader.findClass(urlclassloader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 17 more

sqlObjects. KT code snippet:

object Songs : Table() {
    val _id = integer("_id").autoIncrement().primaryKey() // Line 14
    val songId = integer("song_id")
    val title = text("title")
    val artist = text("artist")
    val levelBSC = integer("level_bsc")
    val levelADV = integer("level_adv")
    val levelEXT = integer("level_ext")
}

I think I followed the sample code correctly, but I can't figure out why I threw it

Solution

You need to add kotlin reflect as a dependency of the project