@VisibleForTesting
  public Journal getJournal(String  jid) {
    return journalsById.get(jid);
  }
@Test(timeout=100000)
  public void testJournalCommonDirAcrossNameSpace() {
    Collection<String> nameServiceIds = DFSUtilClient.getNameServiceIds(conf);
    setupStaticHostResolution(2, "journalnode");
    for (String nsId : nameServiceIds) {
      String jid = "test-journalid-" + nsId;
      Journal nsJournal = jn.getJournal(jid);
      JNStorage journalStorage = nsJournal.getStorage();
      File editsDir = new File(MiniDFSCluster.getBaseDirectory() +
          File.separator + "TestJournalNode" + File.separator + jid);
      assertEquals(editsDir.toString(), journalStorage.getRoot().toString());
    }
  }