// Test error classification for different exception types
        Exception hardwareError = new RuntimeException("RDMA hardware not supported");
        Exception networkError = new java.io.IOException("Network connection failed");
        Exception timeoutError = new java.net.SocketTimeoutException("Operation timed out");

        // Test fallback logic

                    } else if (i == 1) {
                        failureUrl.setErrorName("java.net.SocketTimeoutException");
                    } else {
                        failureUrl.setErrorName("java.io.IOException");
                    }
                    list.add(failureUrl);
                }
                return list;
            }
        }, FailureUrlBhv.class.getCanonicalName());

 */
package org.codelibs.fess.helper;

import static org.codelibs.core.stream.StreamUtil.split;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.service.impl;

import static org.opensearch.common.xcontent.XContentFactory.jsonBuilder;

import java.io.IOException;
import java.nio.charset.Charset;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Base64;
import java.util.Date;

}
```

### 6.2 Modifying SmbFile
```java
// In SmbFile.java
private Smb2LeaseKey leaseKey;
private int leaseState;
private LeaseManager leaseManager;

protected void doConnect() throws IOException {
    // ... existing connection logic ...
    
    if (context.getConfig().isUseLeases() && tree.getSession().supports(SMB3_0)) {
        // Request lease when opening file

   * </ul>
   *
   * <p>Example usage:
   *
   * {@snippet :
   * // Fall back to a secondary input stream in case of IOException.
   * ClosingFuture<InputStream> inputFuture =
   *     firstInputFuture.catchingAsync(
   *         IOException.class, (closer, x) -> secondaryInputStreamClosingFuture(), executor);
   * }
   *

import com.google.common.testing.NullPointerTester;
import com.google.common.testing.SerializableTester;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;

import assertk.assertions.isNull
import assertk.assertions.isSameAs
import assertk.assertions.isTrue
import assertk.fail
import java.io.File
import java.io.FileNotFoundException
import java.io.IOException
import java.util.ArrayDeque
import kotlin.test.assertFailsWith
import okhttp3.SimpleProvider
import okhttp3.TestUtil
import okhttp3.internal.cache.DiskLruCache.Editor
import okhttp3.internal.cache.DiskLruCache.Snapshot

import static org.codelibs.opensearch.runner.OpenSearchRunner.newConfigs;
import static org.opensearch.core.action.ActionListener.wrap;

import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;

    parameter to be non-null was an unintended signature change in OkHttp 4.0.

 *  New: `EventListener.retryDecision()` is called each time a request fails with an `IOException`.
    It notifies your listener if OkHttp will retry.

 *  New: `EventListener.followUpDecision()` is called each time a response is received. It notifies