Icedtea error: "Code source security was null" found in the log

Solution Verified - Updated -


  • Icedtea error: "Code source security was null" found in the log:

    Application is trying to get permissions for file:/C:/Users/someone/application-some-jars.jar, which was not added by standard way. Trying         to download and verify!
    The application may have trouble continuing
    java.lang.NullPointerException: Code source security was null
            at net.sourceforge.jnlp.runtime.JNLPClassLoader.getPermissions(
            at net.sourceforge.jnlp.runtime.JNLPPolicy.getPermissions(
            at net.sourceforge.jnlp.runtime.JNLPPolicy.implies(


  • OpenJDK
    • 8
  • Webstart application

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