SFTP Error: com.jcraft.jsch.JSchException: failed to send channel request

[garuda]

Hello experts,

I am trying to connect to a SFTP server using the ftp provider of JBoss ESB.

<ftp-provider hostname="xxx.yy.ch" name="FtpGateway">

   <ftp-bus busid="FtpGatewayEDI">

    <ftp-message-filter directory="/data/"

     error-directory="/data/" input-suffix=".xml"

     password="lala" post-delete="false"

     post-directory="/data/airbp/" post-suffix=".archived"

     protocol="sftp" read-only="false" username="rubbelthecat" work-suffix=".work"  

     />

   </ftp-bus>

  </ftp-provider>

Unfortunately I get the following exception when trying to connect:

Caused by: com.jcraft.jsch.JSchException: failed to send channel request
at com.jcraft.jsch.Request.write(Request.java:65)
at com.jcraft.jsch.RequestSftp.request(RequestSftp.java:47)
at com.jcraft.jsch.ChannelSftp.start(ChannelSftp.java:186)
at com.jcraft.jsch.Channel.connect(Channel.java:199)
at com.jcraft.jsch.Channel.connect(Channel.java:144)
at org.jboss.internal.soa.esb.util.SecureFtpImpl.initialize(SecureFtpImpl.java:259)
... 59 more

The strange thing is that with openSSH and FileZila I can connect without any problems using the same credentials.

Can you please help out ? My hair are getting less and less due to this problem. Unfortunately the error message is very poor. I had also look at the source code, but without any success.

Vg,

Dennis Suhari

[tcunning]

The source seems to suggest it can't send the request at all.    Have you tried sftp / FileZila to this machine from the machine that you have the ESB server on?    I did a little googling on this error, and it seemed like most of the cause was that someone had changed the sftp configuration but had not restarted the sftp server.

[garuda]

Hi Tom,

unfortunately I also tried sftp / FileZilla on the ESB machine and it worked fine. This is very disturbing.

Br,

Dennis

[tcunning]

The only attribute I don't see you setting in the ftp-message-filter is the passive flag.      Is your sftp server operating on a standard sftp port?

The error and the fact that no one else has seen this error suggest that this is a configuration problem.      

[garuda]

Maybe I am the first one ;-)

The SFTP Server is operating on standard sftp port 22.

[tcunning]

When you use Filezila or sftp are you using a certificate?     I don't know the setup of your sftp server, so it's hard to make suggestions.

certificate-name, certificate-url, certificate-passphrase

See section 9.5 : http://docs.jboss.org/jbossesb/docs/4.10/manuals/html/Programmers_Guide/index.html