builder.add(requestBuilder);
                        }
                    }
                } catch (final Exception e) {
                    logger.warn("Failed to parse {}", dataPath);
                }
                return StringUtil.EMPTY;
            });
            final BulkResponse response = builder.execute().actionGet(fessConfig.getIndexBulkTimeout());

   * <p>Failure to follow this advice may result in non-deterministic behavior.
   *
   * <p>Note that the generated multimap's {@link Multimap#removeAll} and {@link
   * Multimap#replaceValues} methods return collections that aren't synchronized.
   *
   * <p>The returned multimap will be serializable if the specified multimap is serializable.
   *
   * @param multimap the multimap to be wrapped in a synchronized view