CODEWITHSUNDEEP
jsch
sunleo
sunleo

Reputation: 10947

com.jcraft.jsch.JSchException: failed to send sftp request

WinSCP based same connection using account name, passphrase and private key for connection. But trying from code am getting this exception continuously.

Code:

try
{
    session.connect();
    System.out.println("session is alive:" + session.isConnected());
    channel = session.openChannel("sftp");
    channel.connect();

    channelSftp = (ChannelSftp) channel;
    channelSftp.connect();
    channelSftp.chmod(777, depDir);

}
catch (Exception e1)
{
    e1.printStackTrace();
    System.out.println("Manual Exception in updateDepositedFilePermission:" + CommonUtil.getExceptionString(e1));
}

Output:

session is alive:true
Manual Exception in updateDepositedFilePermission:com.jcraft.jsch.JSchException: failed to send sftp request
        at com.jcraft.jsch.RequestSftp.request(Unknown Source)
        at com.jcraft.jsch.ChannelSftp.start(Unknown Source)
        at com.jcraft.jsch.Channel.connect(Unknown Source)
        at com.app.sftp.CheckFTP.main(CheckFTP.java:730)

session is alive:true
com.jcraft.jsch.JSchException: failed to send sftp request
        at com.jcraft.jsch.RequestSftp.request(Unknown Source)
        at com.jcraft.jsch.ChannelSftp.start(Unknown Source)
        at com.jcraft.jsch.Channel.connect(Unknown Source)
        at com.app.sftp.CheckFTP.main(CheckFTP.java:730)

Upvotes: 2

Views: 3580

Answers (1)

Martin Prikryl
Martin Prikryl

Reputation: 202088

Not sure it's the main problem, but you are calling Channel.connect() twice.

First here:

channel.connect();

And again here:

channelSftp.connect();

Remove the second call.

Upvotes: 2

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