When -Dsun.misc.URLClassPath.disableJarChecking=false is set, URLClassPath checks if jars on the classpath start with a valid local directory header, and reports the following exception if they do not:

new IOException("Invalid Jar file");

It would be nice to include the path to the jar file in the exception message, to make the issue easier to debug.

https://github.com/openjdk/jdk/blob/3e393047e12147a81e2899784b943923fc34da8e/src/java.base/share/classes/jdk/internal/loader/URLClassPath.java#L810