@Test(expected = RuntimeException.class)
public void testStoreAllNullTableKey() throws Exception {

    Map<String, Table> tables = new HashMap<String, Table>();
    for (int i = 0; i < 10; i++) {
        Table table = new Table();
        table.setName(UUID.randomUUID().toString());
        table.setTtl(20);
        tables.put(null, table);
    }
    tableMapStore.storeAll(tables);
}