import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.exception.MaxLengthExceededException;
import org.codelibs.fess.crawler.helper.ContentLengthHelper;
import org.codelibs.fess.crawler.helper.MimeTypeHelper;

        String failureUrlId = "?";
        final CrawlerContext crawlerContext = (CrawlerContext) objs[0];
        final UrlQueue<?> urlQueue = (UrlQueue<?>) objs[1];
        final CrawlingAccessException cae = (CrawlingAccessException) objs[2];
        try {
            Throwable t = cae;
            if (t instanceof final MultipleCrawlingAccessException mcae) {
                final Throwable[] causes = mcae.getCauses();

    }

    /**
     * Validates the FTP request by checking the reply code from the FTP server.
     * If the reply code indicates an error, a CrawlingAccessException is thrown.
     *
     * @param client the FTPClient instance to validate
     * @throws CrawlingAccessException if the FTP request failed
     */
    private void validateRequest(final FTPClient client) {
        final int replyCode = client.getReplyCode();

            if (rule == null) {
                throw new CrawlingAccessException("No url rule for " + url);
            }
            responseData.setRuleId(rule.getRuleId());
            final ResponseProcessor responseProcessor = rule.getResponseProcessor();
            if (!(responseProcessor instanceof DefaultResponseProcessor)) {

import org.codelibs.fess.crawler.exception.CrawlingAccessException;

/**
 * Exception thrown when an error occurs during data store crawling operations.
 * This exception provides information about the URL where the error occurred
 * and whether the crawling process should be aborted.
 */
public class DataStoreCrawlingException extends CrawlingAccessException {

    private static final long serialVersionUID = 1L;

            closeResources(httpRequest, responseData);
            throw new CrawlingAccessException("Unknown host(" + e.getMessage() + "): " + url, e);
        } catch (final NoRouteToHostException e) {
            closeResources(httpRequest, responseData);
            throw new CrawlingAccessException("No route to host(" + e.getMessage() + "): " + url, e);
        } catch (final ConnectException e) {

            closeResources(httpRequest, responseData);
            throw new CrawlingAccessException("Unknown host(" + e.getMessage() + "): " + url, e);
        } catch (final NoRouteToHostException e) {
            closeResources(httpRequest, responseData);
            throw new CrawlingAccessException("No route to host(" + e.getMessage() + "): " + url, e);
        } catch (final ConnectException e) {

### Exception Hierarchy

All exceptions are unchecked (extend `RuntimeException` via `CrawlerSystemException`).

```
CrawlerSystemException (RuntimeException)
  ├─ CrawlingAccessException
  │     └─ MaxLengthExceededException
  ├─ ChildUrlsException
  ├─ ExtractException
  │     └─ UnsupportedExtractException
  ├─ CrawlerLoginFailureException
  ├─ ExecutionTimeoutException

import org.codelibs.fess.crawler.client.FesenClient;
import org.codelibs.fess.crawler.entity.OpenSearchAccessResult;
import org.codelibs.fess.crawler.entity.OpenSearchAccessResultData;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.exception.OpenSearchAccessException;
import org.codelibs.fess.crawler.util.OpenSearchResultList;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormatter;

import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.helper.LogHelper;
import org.codelibs.fess.crawler.interval.IntervalController;
import org.codelibs.fess.crawler.log.LogType;
import org.codelibs.fess.crawler.processor.ResponseProcessor;