@Override
      public Void call() throws Exception {
        try (Connection conn = getConnection()) {
          final Admin admin = conn.getAdmin();
          QuotaSettings qs = QuotaSettingsFactory.removeTableSpaceLimit(tn);
          admin.setQuota(qs);
          assertNull(helper.getTableSpaceQuota(conn, tn));
          return null;
        }
      }
Test class to verify that the HBase superuser can override quotas.
hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestSuperUserQuotaPermissions.java