Not Able to connect via proxy

[lakshya1210]

So I am trying to make sftp connection via proxy host and port, but could not able to do it
getConnectionTimeout() = 60 seconds

`

    public Response validateWithMinaEngine(long partnerId, SftpCredentials sftpCredentials) {

    SshClient client = null;
    ClientSession session = null;
    SftpClient sftp = null;

    try {

        ProxyConfig proxyConfig = getProxyConfigMina(true);

        client = createMinaClient(sftpCredentials, proxyConfig);

        if (proxyConfig != null) {
            client.setClientProxyConnector(new HttpProxyConnector(proxyConfig.host, proxyConfig.port, getConnectionTimeout()));
        }

        client.start();

        HostConfigEntry host = new HostConfigEntry(
            "",
            sftpCredentials.getHost(),
            sftpCredentials.getPort(),
            sftpCredentials.getUser()
        );

        session = client.connect(host).verify(getConnectionTimeout(), TimeUnit.MILLISECONDS).getSession();

        if (StringUtils.isNotEmpty(sftpCredentials.getPassword())) {
            session.addPasswordIdentity(sftpCredentials.getPassword());
        }

        session.auth().verify(getConnectionTimeout(), TimeUnit.MILLISECONDS);

        sftp = SftpClientFactory.instance().createSftpClient(session);

        String directory = sftpCredentials.getPathPrefix();
        if (!directory.endsWith("/")) {
            directory += "/";
        }
        sftp.stat(directory);

        return Response.ok(Collections.singletonMap("valid", true)).build();

    } catch (IOException e) {
        logger.error("MINA I/O exception", PIILogMaskingUtils.maskExceptionPII(logger, e));
        throw new ExternalFileException(ExternalFileException.DATABUS_SFTP_FOLDER_ERROR);

    } finally {
        if (sftp != null) try { sftp.close(); } catch (Exception ignore) {}
        if (session != null) try { session.close(); } catch (Exception ignore) {}
        if (client != null) client.stop();
        UserContextProvider.setContext(userContext);
    }
}

private static SshClient createMinaClient(SftpCredentials c, ProxyConfig proxyConfig) {
 
    SshClient client = SshClient.setUpDefaultClient();
    if ("no".equalsIgnoreCase(NO_STRICT_HOST_KEY_CHECK)) {
        client.setServerKeyVerifier(AcceptAllServerKeyVerifier.INSTANCE);
    }

    CoreModuleProperties.AUTH_TIMEOUT.set(client, Duration.ofMillis(getConnectionTimeout()));
    SftpModuleProperties.SFTP_CHANNEL_OPEN_TIMEOUT.set(client, Duration.ofMillis(getConnectionTimeout()));

    return client;
}

public class HttpProxyConnector implements ClientProxyConnector {

        private final String proxyHost;
        private final int proxyPort;
        private final int timeout;

        public HttpProxyConnector(String proxyHost, int proxyPort, int timeout) {
            this.proxyHost = proxyHost;
            this.proxyPort = proxyPort;
            this.timeout = timeout;
        }

        @Override
        public void sendClientProxyMetadata(ClientSession clientSession) throws IOException {
            // For HTTP CONNECT proxy, metadata is sent during connect phase
            // No additional metadata needs to be sent after SSH session is established
            // This method can be empty for HTTP proxies
            logger.error("sendClientProxyMetadata called - no action needed for HTTP proxy");
        }
    }

`

org.apache.sshd.common.SshException: [ssh-connection]: Failed to get operation result within specified timeout: 60000 msec
at org.apache.sshd.common.future.AbstractSshFuture.lambda$verifyResult$1(AbstractSshFuture.java:114)
at org.apache.sshd.common.future.AbstractSshFuture.formatExceptionMessage(AbstractSshFuture.java:206)
at org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:114)
at org.apache.sshd.client.future.DefaultAuthFuture.verify(DefaultAuthFuture.java:56)
at org.apache.sshd.client.future.DefaultAuthFuture.verify(DefaultAuthFuture.java:35)
at org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:84)
at org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:69)
at com.spr.rest.http.dataflow.DataFlowRestrictedRestApi.validateWithMinaEngine(DataFlowRestrictedRestApi.java:849)

error stack trace, please help here.
Any alternative method to connect via proxy only with proxy host and proxy port. (there is no proxy Username)