@Test
    public void justAGraphFails() {
        settings.graphs.put("invalid", "conf/invalidPath");
        final GraphManager manager = new CheckedGraphManager(settings);
        assertThat(manager.getGraphNames(), hasSize(7));
    }
TINKERPOP-2436 The gremlin server starts even if all graphs instantiation
gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/util/CheckedGraphManagerTest.java