**Solution**:
- Split large files into smaller batches (e.g., 10,000 docs per file)
- Increase timeout in `system.properties`:
  ```properties
  crawler.document.request.timeout=600000
  ```
- Use asynchronous import via Admin UI instead of API

#### Issue: Special characters in documents not displaying correctly

**Solution**:
- Ensure source files are UTF-8 encoded
- Check `fess_config.properties`:

    The problem is that GWT responds poorly to two .gwt.xml files in the same
    Java package; see
    https://groups.google.com/g/google-web-toolkit-contributors/c/CqYH59Dt_rQ/m/uVGW1QdUsXUJ
    for details.

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one
    for prod and one for tests. However, unlike our other packages, as of this

    The problem is that GWT responds poorly to two .gwt.xml files in the same
    Java package; see
    https://groups.google.com/g/google-web-toolkit-contributors/c/CqYH59Dt_rQ/m/uVGW1QdUsXUJ
    for details.

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one
    for prod and one for tests. However, unlike our other packages, as of this

 * under the License.
 */
package org.apache.maven.toolchain;

import javax.inject.Named;
import javax.inject.Singleton;

import java.io.File;
import java.io.InputStream;
import java.nio.file.Files;

import org.apache.maven.toolchain.model.PersistedToolchains;
import org.apache.maven.toolchain.v4.MavenToolchainsStaxReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**

	if err != nil {
		return Info{}, err
	}
	reservedBlocks := s.Bfree - uint64(s.Bavail)
	info = Info{
		Total:  uint64(s.Bsize) * (s.Blocks - reservedBlocks),
		Free:   uint64(s.Bsize) * uint64(s.Bavail),
		Files:  s.Files,
		Ffree:  uint64(s.Ffree),
		FSType: getFSType(s.Fstypename[:]),
	}
	if info.Free > info.Total {

 */

package org.elasticsearch.gradle.internal.release;

import com.google.common.annotations.VisibleForTesting;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;

import static java.util.Comparator.reverseOrder;

		return Info{}, err
	}
	reservedBlocks := uint64(s.Bfree) - uint64(s.Bavail)
	info = Info{
		Total:  uint64(s.Frsize) * (uint64(s.Blocks) - reservedBlocks),
		Free:   uint64(s.Frsize) * uint64(s.Bavail),
		Files:  uint64(s.Files),
		Ffree:  uint64(s.Ffree),
		FSType: getFSType(s.Fstr[:]),
	}
	if info.Free > info.Total {

java.io.RandomAccessFile
java.nio.file.Path#toFile()

@defaultMessage Specify a location for the temp file/directory instead.
java.nio.file.Files#createTempDirectory(java.lang.String,java.nio.file.attribute.FileAttribute[])
java.nio.file.Files#createTempFile(java.lang.String,java.lang.String,java.nio.file.attribute.FileAttribute[])

@defaultMessage Don't use java serialization - this can break BWC without noticing it

import org.lastaflute.web.ruts.multipart.MultipartFormFile;
import org.lastaflute.web.validation.Required;

/**
 * Form for uploading search request files to the Fess search engine.
 * This form is used in the admin interface to upload search request configuration files
 * that define search behaviors and request handling.
 */
public class UploadForm {

    /**

import org.lastaflute.web.ruts.multipart.MultipartFormFile;
import org.lastaflute.web.validation.Required;

/**
 * Form for uploading bad word files to the Fess search engine.
 * This form is used in the admin interface to upload bad word dictionary files
 * that contain words to be filtered from search results.
 */
public class UploadForm {

    /**
     * The multipart file containing bad words to be uploaded.