"The Transport Protocol thread failed" – "The socket is EOF" with J2SSH connection using Java
<p>I am trying to establish an SSH connection through my Java code, but getting below exception .. I tested my connection through Putty/Winscp tools and it works fine. The problem is with my Java code...</p>

<pre><code>SEVERE: The Transport Protocol thread failed
java.io.IOException: The socket is EOF
    at com.sshtools.j2ssh.transport.TransportProtocolInputStream.readBufferedData(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolInputStream.readMessage(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolCommon.readMessage(Unknown Source)
    at com.sshtools.j2ssh.transport.kex.DhGroup1Sha1.performClientExchange(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolClient.performKeyExchange(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolCommon.beginKeyExchange(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolCommon.onMsgKexInit(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolCommon.startBinaryPacketProtocol(Unknown Source)
    at com.sshtools.j2ssh.transport.TransportProtocolCommon.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
</code></pre>

<p>Below is my piece of Java code to establish the connection </p>

<pre><code>public class MySSHClient {

  static SshClient ssh = null;
  static SshConnectionProperties properties = null;
  SessionChannelClient session = null;

  private static void MySSHClient(String hostName, String userName, String passwd )
  {

    try
    {
      // Make a client connection
      ssh = new SshClient();
      properties = new SshConnectionProperties();
      properties.setHost("192.168.1.175");

      // Connect to the host
      ssh.connect(properties, new IgnoreHostKeyVerification());

      // Create a password authentication instance
      PasswordAuthenticationClient pwd = new PasswordAuthenticationClient();

      pwd.setUsername("root");
      pwd.setPassword("123456");

      // Try the authentication
      int result = ssh.authenticate(pwd);

      // Evaluate the result
      if (result==AuthenticationProtocolState.COMPLETE) {

        System.out.println("Connection Authenticated");
      }
    }
    catch(Exception e)
    {
      System.out.println("Exception : " + e.getMessage());
    }

  }//end of method.


  public String execCmd(String cmd)
  {
    String theOutput = "";
    try
    {
      // The connection is authenticated we can now do some real work!
      session = ssh.openSessionChannel();

      if ( session.executeCommand(cmd) )
      {
        IOStreamConnector output = new IOStreamConnector();
        java.io.ByteArrayOutputStream bos =  new
        java.io.ByteArrayOutputStream();
        output.connect(session.getInputStream(), bos );
        session.getState().waitForState(ChannelState.CHANNEL_CLOSED);
        theOutput = bos.toString();
      }
      //else
      //throw Exception("Failed to execute command : " + cmd);
      //System.out.println("Failed to execute command : " + cmd);
    }
    catch(Exception e)
    {
      System.out.println("Exception : " + e.getMessage());
    }

    return theOutput;
  }

  public static void main(String[] args){
      MySSHClient(null, null, null);
    }
</code></pre>