if (logger.isDebugEnabled()) {
                        logger.warn("[{}][{}] Failed to analyze a text(size:{}).", field, lang, buf.length(), e);
                    } else {
                        logger.warn("[{}][{}] Failed to analyze a text(size:{}). {}", field, lang, buf.length(), e.getMessage());
                    }
                }
                buf.setLength(0);

                throw new CrawlingAccessException("[" + e.status() + "] Failed to insert " + id, e);
            }
            throw new OpenSearchAccessException("[" + e.status() + "] Failed to insert " + id, e);
        } catch (final Exception e) {
            throw new OpenSearchAccessException("Failed to insert " + id, e);
        }
    }

    /**

            } else {
                lastModified = System.currentTimeMillis();
            }

        } catch (final Exception e) {
            throw new IllegalArgumentException("failed to build synonyms", e);
        }
    }

    private Reader getReader(final boolean reload) throws IOException {
        if (reload) {
            if (reloadableFile == null) {

            client.admin().indices().prepareRefresh().setIndices(actualIndex).execute().actionGet(settings.getIndicesTimeout());
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to add to array.", e);
        }
    }

    /**
     * Delete values from array index.
     * @param index Index
     * @param type Type
     * @param key Key
     */

            try {
                getUrlFilterService().addIncludeUrlFilter(sessionId, cachedIncludeSet.stream().collect(Collectors.toList()));
            } catch (final Exception e) {
                logger.warn("Failed to add include_urls on " + sessionId, e);
            }
            cachedIncludeSet.clear();
        }
        if (!cachedExcludeSet.isEmpty()) {
            try {

            }
            return created;
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to create index. index: {}", index, e);
            }
            throw new SuggesterException("Failed to create index.", e);
        }
    }

    /**
     * Creates a new index and replaces the current update alias with the new index.
     */

            if (throwExceptionOnInit) {
                throw new IOException("Init failed");
            }
        }

        @Override
        public List<String> convert(String text, String field, String... langs) throws IOException {
            if (throwExceptionOnConvert) {
                throw new IOException("Convert failed");
            }
            return Collections.emptyList();
        }
    }

            throw new CrawlerSystemException("officeManager is null.");
        }
        try {
            officeManager.start();
        } catch (final OfficeException e) {
            throw new CrawlerSystemException("Failed to start officeManager.", e);
        }
        if (logger.isDebugEnabled()) {
            logger.debug(officeManager.getClass().getSimpleName() + " is started.");
        }
    }

    /**

            // gz
            bis.reset();
            return isValid(new GZIPInputStream(bis), false);
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to validate a file.", e);
            }
        }
        return false;
    }

    /**
     * Generates SitemapSet instance.
     *
     * This method does not close the input stream.
     *

     */
    public interface RequestListener {

        /**
         * Called when a request starts.
         *
         * @param client the fault-tolerant client
         * @param request the request data
         */
        void onRequestStart(FaultTolerantClient client, RequestData request);

        /**
         * Called before each request attempt.
         *
         * @param client the fault-tolerant client