private static List<URL> getCurrentClassPaths(ClassLoader parentLoader) {
    if(parentLoader instanceof URLClassLoader) {
      return Lists.newArrayList(((URLClassLoader) parentLoader).getURLs());
    } else {
      return Collections.emptyList();
    }
  }
Returns currently known class paths as best effort. For system class loader, this may return
In such cases we will anyway create new child class loader in {@link #addToClassPath(ClassLoader cloader, String[] newPaths)
so all new class paths will be added and next time we will have a URLClassLoader to work wit
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/utils/MetaStoreUtils.java