Windows filename or extension is too long

I am running on Windows, and when executing mvn spring-boot:run, I get the error: `CreateProcess error=206, The filename or extension is too long.`

This is a hardcoded limitation imposed by Windows on command lengths, and a known issue with Spring Boot due to how it builds its classpath. For more information, see

There are a few ways this can be dealt with.

  • To simply get the app running, run the compiled jar with
java -jar .\target\demo-min-application.jar
  • To enable debugging, instead run the compiled jar with:
java -jar -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8004 .\target\demo-min-application.jar
  • If running the app through IntelliJ, there are Run/Debug Configuration options to shorten the command line. In the run configuration, set "Shorten Command Line" to either JAR Manifest or manifest file. Visit the JetBrains website for more information,
  • A work-around to allow running with mvn spring-boot:run is to soft link your .m2 directory to the root of the drive. This will shorten the overall classpath by reducing absolute filepaths in your dependencies.
  • mklink /J c:\repo C:\<long path to your maven repository>
    mvn -Dmaven.repo.local=c:\repo spring-boot:run