A message is displayed indicating that the process of waiting for the key to be updated times out when JSCH is used for SSH connection
Here is my configuration:
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
//get the JSCH session
Session session = connectInfo.getJSch().getSession(serverConfig.getUsername(), serverConfig.getHost(), serverConfig.getPort());
session.setConfig(config);
//set password
session.setPassword(serverConfig.getPassword());
// Send null packet each 100s
session.setServerAliveInterval(100);
// Send 9999 max null packet
session.setServerAliveCountMax(9999);
// No connection timeout
session.connect(0);
ChannelExec channel = (ChannelExec) session.openChannel("exec");
channel.setCommand(command);
channel.setInputStream(null);
channel.setErrStream(System.err);
channel.connect();
InputStream inputStream = channel.getInputStream();
StringBuilder resultLines = new StringBuilder();
Here's the actual log#Martin Prikryl
I found the right answer！Error caused by my Linux server time inaccuracy,Synchronizing the exact time can solve this problem.
Related
I am using the same client connection properties for Producer and Consumer. But while I am able to Produce messages to RabbitMQ, getting following error for Consumer side. I have read many solutions all say check out connection properties, firewall etc. But I have working producer.
Consumer side connection codes:
String userName = "myuser"; // not guest
String password = "mypassword"; // not guest
String virtualHost = "/";
String hostName = "one_of_rbmq_ip";
Integer portNumber = 5672;
ConnectionFactory factory = new ConnectionFactory();
// "guest"/"guest" by default, limited to localhost connections
factory.setUsername(userName);
factory.setPassword(password);
factory.setVirtualHost(virtualHost);
factory.setHost(hostName);
factory.setPort(portNumber);
Connection conn = factory.newConnection();
Error gives at last line (conn)
Exception in thread "main" java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
at java.net.Socket.connect(Socket.java:606)
at com.rabbitmq.client.impl.SocketFrameHandlerFactory.create(SocketFrameHandlerFactory.java:60)
at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:63)
at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:160)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1216)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1173)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1131)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1294)
at Condumer2.main(Condumer2.java:25)
I have changed my code like following it worked
Address[] addrArr = new Address[]{ new Address("10.28.94.117", 5672)
, new Address("10.28.94.118", 5672)
, new Address("10.28.94.119", 5672)
};
ConnectionFactory factory = new ConnectionFactory();
factory.setUsername("rabbitmq");
factory.setPassword("qa");
Connection connection = factory.newConnection(addrArr);
Channel channel = connection.createChannel();
I am trying to connect to a remote external server using TCP sockets in WCF code
My WCF service is the client which has code using sockets to connect to an external server.
This code sends a request to an external server and receives the server response
int byteCount = 0;
Socket m_socClient;
try
{
string query = "My Request String";
m_socClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
System.Net.IPAddress remoteIPAddress = System.Net.IPAddress.Parse("127:0:0:0");
System.Net.IPEndPoint remoteEndPoint = new System.Net.IPEndPoint(remoteIPAddress, 1234);
EVCommon.Log("COnnecting to" + IPSelected + Port);
m_socClient.Connect(remoteEndPoint);
try
{
if (m_socClient.Connected)
{
EVCommon.Log("Connected to" + IPSelected + Port);
var reQuestToSend = string.Format("POST /ZZZZZ HTTP/1.1\r\nContent-Length:{0}\r\n\r\n{1}", query.Length, query);
byte[] bytesToSend = Encoding.ASCII.GetBytes(reQuestToSend);
byteCount = m_socClient.Send(bytesToSend, SocketFlags.None);
byte[] bytesReceived = new byte[1024];
byteCount = m_socClient.Receive(bytesReceived, SocketFlags.None);
Response271 = Encoding.ASCII.GetString(bytesReceived);
m_socClient.Disconnect(false);
m_socClient.Close(5000);
}
}
catch(Exception ex)
{
EVCommon.Log(ex.Message);
}
}
If I make a windows application with the same client code to connect to the remote server, it is successful. I am able to connect, send and receive
This error occurs only when I bring WCF into the picture. The code fails at if(m_socket.Connected). So it is not able to connect successfully.
A request to send or receive data was disallowed because the socket
is not connected and (when sending on a datagram socket using a sendto call) no address was supplied.
Thank you
The difference is that the windows applications runs in the identity of the logged in user and the WCF service runs in the identity of the application pool.
What is probably happening is that the application pool is running as NETWORK SERVICE which does not have the right to open a port.
Try changing the identity of the app pool to your user to check if this is the problem.
I am using jsch for sftp file transfer. When I send file using sftp command by setting the buffer size 512 (-B option ) sftp B 512 [sftp server name] and invoking put command, I can transfer files in 8.0MBPS. (The regular speed is 3.0MBPS).
When I do the same file transfer using jsch api in java, I get only 2.6MBPS. Is there any option to increase the buffer size in jsch or improve the speed of jsch?
Here is my code...
Channel channel = null;
ChannelSftp channelSftp = null;
log("preparing the host information for sftp.");
try {
JSch jsch = new JSch();
session = jsch.getSession(username, hostname, port);
session.setPassword(password);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
System.out.println("Host connected.");
channel = session.openChannel("sftp");
channel.connect();
log("sftp channel opened and connected.");
channelSftp = (ChannelSftp) channel;
channelSftp.cd(SFTPWORKINGDIR);
File f = new File(fileName);
channelSftp.put(new FileInputStream(f), f.getName());
log("File transferred successfully to host.");
} catch (Exception ex) {
System.out.println("Exception found while transfer the response.");
ex.printStackTrace();
} finally{
channelSftp.exit();
log("sftp Channel exited.");
channel.disconnect();
log("Channel disconnected.");
session.disconnect();
log("Host Session disconnected.");
}
Check out the newer version of Jsch (1.50), it became faster downloading.
It may work but I am not sure. I saw it somewhere in jsch code base.
You can try it out:
getSession().setConfig("max_input_buffer_size", "increased_size");
Jsch, private.ppk based login.
Currently i have following code to ssh login but getting exception due to does not provide key.
Following is my error i am getting
om.jcraft.jsch.JSchException: Auth cancel
JSch jsch = new JSch();
Session session = jsch.getSession(user_name, host, 22);
UserInfo ui = new SSHUserInfo(password, true);
session.setUserInfo(ui);
//connect to remove server
session.connect();
//sudo login bamboo
if (null != session && session.isConnected()) {
session.disconnect();
}
JSch jsch = new JSch();
// Here privateKey is a file path like "/home/me/.ssh/secret_rsa "
// passphrase is passed as a string like "mysecr"
jsch.addIdentity(privateKey, passphrase);
session = jsch.getSession(user, host, port);
session.setConfig("StrictHostKeyChecking", "no");
// Or yes, up to you. If yes, JSch locks to the server identity so it cannot
// be swapped by another with the same IP.
session.connect();
channel = session.openChannel("shell");
out = channel.getOutputStream();
channel.connect();
The file suffix ".ppk" means that you are trying to use Putty's private key, I guess.
JSch has supported the Putty's private keys since 0.1.49,
and if your key is ciphered, you must install "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files"[1] on your environment.
And then, if you are using Pageant usually, you may be interested in trying jsch-agent-proxy[2].
[1] http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html
[2] https://github.com/ymnk/jsch-agent-proxy
I am using a RabbitMQ DefaultConsumer
public void init () {
DefaultConsumer dc = new DefaultConsumer(channel);
dc.addShutdownListener(this);
}
handleShutdownSignal() {
//TODO: Recreate channel associated with this consumer
}
Once there is an error with the channel, and a shutdownsignal is sent, how can I reinitialize the channel since the consumer is already dependent on the previous channel it was using ?
You will need to re establish the connection, create a channel and then create a new consumer. If the connection is still ok you may be able to use that to get a new channel.