* All access is synchronized via indexUpdateCallback lock.
     */
    protected List<String> deleteUrlList = new ArrayList<>();

    /** Maximum size of the delete URL cache before batch deletion is triggered. */
    protected int maxDeleteDocumentCacheSize;

    /** Maximum number of redirects to follow when processing URLs. */
    protected int maxRedirectCount;

        for (int i = 0; i < threadCount; i++) {
            final int index = i;
            threads[i] = new Thread(() -> {
                try {
                    // Call processRequest which triggers initialization
                    client.doGet("file://nonexistent.txt");
                } catch (Exception e) {
                    // Expected for nonexistent file
                }

				"application/spirits-event+xml",
				"application/srgs",
				"application/srgs+xml",
				"application/ssml+xml",
				"application/timestamp-query",
				"application/timestamp-reply",
				"application/tve-trigger",
				"application/ulpfec",
				"application/vemmi",
				"application/vividence.scriptfile",
				"application/vnd.3gpp.bsf+xml",
				"application/vnd.3gpp.pic-bw-large",
				"application/vnd.3gpp.pic-bw-small",

   - Admin > System > Search
   - Try searching by exact URL
2. Verify required fields are present:
   - `url`, `title`, `content`
3. Check crawler logs: `logs/fess-crawler.log`
4. Manually trigger re-indexing:
   - Admin > Scheduler
   - Run "Default Crawler" job

#### Issue: Authentication errors on API calls

**Solution**:
- Verify credentials: default is `admin`/`admin`

     other widely used forms
   * Where there's a hierarchy in the types, list it via a parent
   * Highly specific magic matches get a high priority
   * General magic matches which could trigger a false-positive need
     a low one
   * The priority for containers normally need to be higher than for
     the things they contain, so they don't accidently get detected
     as what's in them