**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
If applicable, add screenshots to help explain your problem.

                response = client.prepareSearchScroll(scrollId)
                        .setScroll(settings.getScrollTimeout())
                        .execute()
                        .actionGet(settings.getSearchTimeout());
                if (!scrollId.equals(response.getScrollId())) {
                    SuggestUtil.deleteScrollContext(client, scrollId);
                }
                scrollId = response.getScrollId();
            }

    }

    @Test
    public void testScrollTimeout() {
        // Test setting scroll timeout
        SuggestSettingsBuilder result = builder.scrollTimeout("10s");
        assertEquals(builder, result); // Test method chaining
        assertEquals("10s", builder.timeoutSettings.scrollTimeout);

        // Test updating scroll timeout
        builder.scrollTimeout("30s");

            if (logger.isDebugEnabled()) {
                logger.debug("Failed to process a scroll request.", e);
            }
            writeJsonResponse(HttpServletResponse.SC_BAD_REQUEST, e);
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to process a scroll request.", e);
            }

                if (!scrollId.equals(response.getScrollId())) {
                    SuggestUtil.deleteScrollContext(client, scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            SuggestUtil.deleteScrollContext(client, scrollId);
        }

    }

    @Test
    public void testDeleteScrollContext() {
        // Test with null scrollId (should not throw exception)
        SuggestUtil.deleteScrollContext(client, null);

        // Test with non-null scrollId
        String scrollId = "test_scroll_id";
        SuggestUtil.deleteScrollContext(client, scrollId);
        // No exception should be thrown
    }

    @Test

api.access.token.request.parameter=
# Permissions for API admin access.
api.admin.access.permissions=Radmin-api
# Accepted referers for API search.
api.search.accept.referers=
# Whether to enable scroll for API search.
api.search.scroll=false
# Headers for API JSON response.
api.json.response.headers=Referrer-Policy:strict-origin-when-cross-origin
# Whether to include exceptions in API JSON response.

                    try (final BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out.stream(), Constants.CHARSET_UTF_8))) {
                        SearchEngineUtil.scroll(index, hit -> {
                            try {
                                writer.write("{\"index\":{\"_index\":\"" + index + "\",\"_id\":\""

    /**
     * Get the value for the key 'api.search.scroll'. <br>
     * The value is, e.g. false <br>
     * comment: Whether to enable scroll for API search.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getApiSearchScroll();

    /**
     * Is the property for the key 'api.search.scroll' true? <br>
     * The value is, e.g. false <br>

        final String index = "fess_basic_config";
        final ZipEntry entry = new ZipEntry(id + "/fess_basic_config.bulk");
        try {
            zos.putNextEntry(entry);
            SearchEngineUtil.scroll(index, hit -> {
                final String data = "{\"index\":{\"_index\":\"" + index + "\",\"_id\":\"" + StringEscapeUtils.escapeJson(hit.getId())
                        + "\"}}\n" + hit.getSourceAsString() + "\n";