});
        }

        // start all threads at once
        try {
            startLatch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        // wait for all thread to end
        try {
            endLatch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        public void start() {
            try {
                server.start();
            } catch (final Exception e) {
                throw new CrawlerSystemException(e);
            }
        }

        public void stop() {
            try {
                server.stop();
                server.join();
            } catch (final Exception e) {
                throw new CrawlerSystemException(e);
            }

                }
            } catch (final Exception e) {
                throw new PluginException("Failed to install the artifact " + artifact.getName(), e);
            }
        } else {
            try (final InputStream in = new FileInputStream(url)) {
                CopyUtil.copy(in, ResourceUtil.getPluginPath(fileName).toFile());
            } catch (final Exception e) {

                resultData.setData(data.getBytes(Constants.UTF_8_CHARSET));
            }
            resultData.setEncoding(charsetName);

            return resultData;
        } catch (final CrawlerSystemException e) {
            throw e;
        } catch (final Exception e) {
            throw new CrawlerSystemException("Could not store data.", e);
        }
    }

 *
 * ```java
 * HttpUrl base = HttpUrl.parse("https://www.youtube.com/user/WatchTheDaily/videos");
 * HttpUrl link = base.resolve("../../watch?v=cbP2N1BQdYc");
 * System.out.println(link);
 * ```
 *
 * which prints:
 *
 * ```
 * https://www.youtube.com/watch?v=cbP2N1BQdYc
 * ```
 *
 * ## What's in a URL?
 *
 * A URL has several components.
 *
 * ### Scheme
 *

                    } catch (IOException e) {
                        getLogger()
                                .debug("Error releasing exclusive lock for resolution tracking file: " + touchfile, e);
                    }
                }

                if (channel != null) {
                    try {
                        channel.close();
                    } catch (IOException e) {

            Files.createDirectories(resumeProperties.getParent());
            try (Writer writer = Files.newBufferedWriter(resumeProperties)) {
                properties.store(writer, null);
            }
        } catch (IOException e) {
            String message = "Could not create " + RESUME_PROPERTIES_FILENAME + " file.";
            throw new BuildResumptionPersistenceException(message, e);
        }
    }

            final Method method = clazz.getMethod("shutdownAll", (Class<?>[]) null);
            method.invoke(null, (Object[]) null);
        } catch (final ClassNotFoundException e) {
            // ignore
        } catch (final Exception e) {
            logger.warn("Could not shutdown Commons HttpClient.", e);
        }
    }

          v0(),
          putIfAbsent(e0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutIfAbsent_unsupportedPresentDifferentValue() {
    try {
      getMap().putIfAbsent(k0(), v3());
    } catch (UnsupportedOperationException tolerated) {
    }

                    }
                } catch (final ChildUrlsException e) {
                    crawlerStatsHelper.record(keyObj, StatsAction.CHILD_URLS);
                    e.getChildUrlList().stream().map(RequestData::getUrl).forEach(urlQueue::offer);
                } catch (final DataStoreCrawlingException e) {