See http://hg.openjdk.java.net/jdk/jdk/file/d3382812b788/src/hotspot/share/memory/dynamicArchive.cpp#l1070

Currently only a warning is printed. Should we be more strict and give an error instead?

address DynamicArchive::map() {
  assert(UseSharedSpaces, "Sanity");

  // Create the dynamic archive map info
  FileMapInfo* mapinfo;
  const char* filename = Arguments::GetSharedDynamicArchivePath();
  struct stat st;
  address result;
  if ((filename != NULL) && (os::stat(filename, &st) == 0)) {
    mapinfo = new FileMapInfo(false);
    if (!mapinfo->open_for_read(filename)) {
      result = NULL;
    }
    result = map_impl(mapinfo);
    if (result == NULL) {
      map_failed(mapinfo);
      mapinfo->restore_shared_path_table();
    }
  } else {
    if (filename != NULL) {
      log_warning(cds, dynamic)("specified dynamic archive doesn't exist: %s", filename);
    }
    result = NULL;
  }
  return result;
}