Hi,
I'm performing a scp copy of a directory from a Windows machine to an AIX
server through JSch.
I started by using the ScpTo.java example for every file in the directory
but the transfer was quite slow due to the multiple session connections
needed.
My idea was to use a single JSch session to complete the full copy of the
files.
I implemented a static Session which is instanciated and retrieved through a
getSession() method:
*private* *static* Session *session;*
*public* *static* Session getSession(String user, String host, String mdp) {
*if* (*session*==*null* || !*session*.isConnected())
{
*try* {
JSch jsch = *new* JSch();
*session* = jsch.getSession(user, host, 22);
MyUserInfo ui = *new* MyUserInfo();
ui.setPassword(mdp);
*session*.setUserInfo(ui);
*session*.setDaemonThread(*true*);
*session*.connect();
} *catch* (JSchException e) {
e.printStackTrace();
}
}
*return* *session*;
}
Then, in the main function executing the copy, the channels are created from
this static session:
*session* = *getSession*(user, host, mdp);
String command = "scp -p -t " + rfile+"/"+lfile;
Channel chan = *session*.openChannel("exec");
However, i get sometimes the error message "session is down" when performing
a copy.
session is down
at com.jcraft.jsch.Channel.connect(*Channel.java:186*)
at com.jcraft.jsch.Channel.connect(*Channel.java:144*)
...
It seems to appear at random with this configuration. It happens a bit more
frequently if a timeout value is set for the session. And it happens almost
every time if a timeout value is set for the channels.
Do you know the reason behind this behaviour?
Thanks,
Regards,
Christophe Canonville
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