Caused by java.io.IOException: CreateProcess error=206, The filename or extension is too long

While working on Java gradle project sometimes we might get the following error in Windows system:

Caused by: java.io.IOException: CreateProcess error=206, The filename or extension is too long

This is due to when classpath for a Gradle JavaExec or Test task is long, Windows command executions give an error because of the limitation to command line length greater than 32K

With a number of classpath dependencies in a large project, typically JavaExec Gradle task fails with error "The filename or extension is too long" and this would be a stopping error. To solve this issue, we can use the following gradle plugin. Use the plugin inside build.gradle file

apply plugin: "com.virgo47.ClasspathJar"

Or we can use inside build.gradle file under buildscript {} >> dependencies {} section as below:

buildscript {
  repositories {
    maven {
      url "https://plugins.gradle.org/m2/"
    }
  }
  dependencies {
    classpath "gradle.plugin.com.virgo47.gradle:ClasspathJar:1.0.0"
  }
}

For Kotlin project, use it inside build.gradle.kts file as below:

apply(plugin = "com.virgo47.ClasspathJar")

Or we can use it in the build.gradle.kts kotlin file under buildscript {} >> dependencies {}

buildscript {
  repositories {
    maven {
      url = uri("https://plugins.gradle.org/m2/")
    }
  }
  dependencies {
    classpath("gradle.plugin.com.virgo47.gradle:ClasspathJar:1.0.0")
  }
}

ClasspathJar plugin creates a classpath jar for jar files in the classpath and sets the classpath with classpath jar. This includes JavaExec, Test and other similar tasks.

Build the application and run it.

Reference: ClasspathJar

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