import java.net.ProtocolException
import java.net.Proxy
import java.net.ProxySelector
import java.net.ServerSocket
import java.net.Socket
import java.net.SocketAddress
import java.net.SocketException
import java.net.SocketTimeoutException
import java.net.URI
import java.net.URLConnection
import java.net.UnknownHostException
import java.security.KeyStore
import java.security.cert.CertificateException
import java.security.cert.X509Certificate

        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
        assertTrue(errorHandler.shouldFallbackToTcp(hardwareError), "Hardware errors should suggest TCP fallback");

                    if (i == 0) {
                        failureUrl.setErrorName("java.net.ConnectException");
                    } else if (i == 1) {
                        failureUrl.setErrorName("java.net.SocketTimeoutException");
                    } else {
                        failureUrl.setErrorName("java.io.IOException");
                    }
                    list.add(failureUrl);
                }