Set<Object> observed = Sets.newIdentityHashSet(); // for the sake of weakly referenced locks.
    // this gets the stripes with #getAt(index)
    for (int i = 0; i < striped.size(); i++) {
      Object object = striped.getAt(i);
      assertThat(object).isNotNull();
      assertSame(object, striped.getAt(i)); // idempotent
      observed.add(object);
    }
    assertTrue("All stripes observed", observed.size() == striped.size());

    Set<Object> observed = Sets.newIdentityHashSet(); // for the sake of weakly referenced locks.
    // this gets the stripes with #getAt(index)
    for (int i = 0; i < striped.size(); i++) {
      Object object = striped.getAt(i);
      assertThat(object).isNotNull();
      assertSame(object, striped.getAt(i)); // idempotent
      observed.add(object);
    }
    assertTrue("All stripes observed", observed.size() == striped.size());

        // load the child project, which inherits from p0...
        MavenProject project0 = getProject(pom0);
        MavenProject project1 = getProject(pom1);

        assertEquals(project1.getScm().getUrl(), project0.getScm().getUrl() + "/modules/p1");
        assertEquals(project1.getScm().getConnection(), project0.getScm().getConnection() + "/modules/p1");
        assertEquals(

                    repo -> System.out.println("  - " + repo.getId() + " (" + repo.getUrl() + ")"));

            System.out.println("Child1 project repositories:");
            child1Project
                    .getRemoteArtifactRepositories()
                    .forEach(repo -> System.out.println("  - " + repo.getId() + " (" + repo.getUrl() + ")"));

            System.out.println("Child2 project repositories:");

                }
                return;
            }
            logger.warn("Failed to store failure url: url={}", urlQueue.getUrl(), e);
        }

        if (cae.isDebugEnabled()) {
            logger.debug("[{}] Crawling Access Exception: url={}", failureUrlId, urlQueue.getUrl(), cae);
        } else if (cae.isInfoEnabled()) {
            logger.info("[{}] {}", failureUrlId, cae.getMessage());

    assertThat(stats.hitCount()).isEqualTo(0);

    assertThat(cache.getAll(ImmutableList.of())).isEmpty();
    assertThat(stats.missCount()).isEqualTo(0);
    assertThat(stats.loadSuccessCount()).isEqualTo(0);
    assertThat(stats.loadExceptionCount()).isEqualTo(0);
    assertThat(stats.hitCount()).isEqualTo(0);

    assertThat(cache.getAll(asList(1))).containsExactly(1, 1);
    stats = cache.stats();

                                + " (" + repository.getUrl() + ")");
            }

            return false;
        }

        if (getLogger().isDebugEnabled()) {
            getLogger()
                    .debug("Determining update check for " + artifact + " (" + file + ") from " + repository.getId()
                            + " (" + repository.getUrl() + ")");
        }

        if (file == null) {

        if (handshakeComplete) {
            return;
        }
        doHandshake();
        handshakeComplete = true;
    }

    @Override
    public URL getURL() {
        return connection.getURL();
    }

    @Override
    public int getContentLength() {
        try {
            handshake();
        } catch (final IOException ex) {}

        assertNotNull(result);
        assertNull(result.getId());
        assertNull(result.getSessionId());
        assertNull(result.getRuleId());
        assertNull(result.getUrl());
        assertNull(result.getParentUrl());
        assertEquals(Constants.OK_STATUS, result.getStatus());
        assertNull(result.getHttpStatusCode());
        assertNull(result.getMethod());

        }
        final List<UrlQueue<String>> targetList = new ArrayList<>(urlQueueList.size());
        for (final UrlQueue<String> urlQueue : urlQueueList) {
            if (!exists(sessionId, urlQueue.getUrl()) && !dataService.exists(sessionId, urlQueue.getUrl())) {
                urlQueue.setSessionId(sessionId);
                targetList.add(urlQueue);
            } else if (logger.isDebugEnabled()) {