try {
                join();
            } catch (final InterruptedException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupted.", e);
                }
            }
        }

        public void awaitTermination(final long mills) {
            try {
                join(mills);
            } catch (final InterruptedException e) {

  </function>

  <function>
    <description>Concatenate strings.</description>
    <name>join</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String join(java.lang.Object)</function-signature>
    <example>${fe:join(values)}</example>
  </function>

  <function>
    <description>

                metaDataMap.put(key, values);

                // meta -> content
                if (fessConfig.isCrawlerMetadataContentIncluded(key)) {
                    final String joinedValue = StringUtils.join(values, ' ');
                    if (StringUtil.isNotBlank(joinedValue)) {
                        if (contentMetaBuf.length() > 0) {
                            contentMetaBuf.append(' ');
                        }

				<exclusion>
					<groupId>org.opensearch.plugin</groupId>
					<artifactId>lang-painless</artifactId>
				</exclusion>
				<exclusion>
					<groupId>org.opensearch.plugin</groupId>
					<artifactId>parent-join-client</artifactId>
				</exclusion>
				<exclusion>
					<groupId>org.opensearch.plugin</groupId>
					<artifactId>transport-netty4-client</artifactId>
				</exclusion>
				<exclusion>

            params.put("Referer", e.getReferer());
            params.put("Languages", e.getLanguages());
            params.put("Virtual Host", e.getVirtualHost());
            params.put("Roles", e.getRoles() != null ? String.join(" ", e.getRoles()) : StringUtil.EMPTY);
            params.put("User Agent", e.getUserAgent());
            e.getSearchFieldLogList().stream().forEach(p -> {
                params.put(p.getFirst(), p.getSecond());

            for (int i = 0; i < fragments.length; i++) {
                texts[i] = fragments[i].string();
            }
            final String value = StringUtils.join(texts, ELLIPSIS);
            if (StringUtil.isNotBlank(value) && !ComponentUtil.getFessConfig().endsWithFullstop(value)) {
                return value + ELLIPSIS;
            }
            return value;
        }

            cmdList.add(StringUtils.join(webConfigIds, ','));
        }
        if (fileConfigIds != null && fileConfigIds.length > 0) {
            cmdList.add("-f");
            cmdList.add(StringUtils.join(fileConfigIds, ','));
        }
        if (dataConfigIds != null && dataConfigIds.length > 0) {
            cmdList.add("-d");
            cmdList.add(StringUtils.join(dataConfigIds, ','));
        }

    }

    private void assertArrays(final String[] expected, final String[] actual) {
        Arrays.sort(expected);
        Arrays.sort(actual);
        assertEquals(String.join(",", expected), String.join(",", actual));
    }

            }
            final Object languages = req.getAttribute(Constants.REQUEST_LANGUAGES);
            if (languages != null) {
                searchLog.setLanguages(StringUtils.join((String[]) languages, ","));
            } else {
                searchLog.setLanguages(StringUtil.EMPTY);
            }

            @SuppressWarnings("unchecked")

        thumbnailQueueThread.start();
    }

    @PreDestroy
    public void destroy() {
        generating = false;
        thumbnailQueueThread.interrupt();
        try {
            thumbnailQueueThread.join(10000);
        } catch (final InterruptedException e) {
            logger.warn("Thumbnail thread is timeouted.", e);
        }
        generatorList.forEach(g -> {
            try {
                g.destroy();