There are a lot of possibilities why this could be happening occasionally: 1. Network congestion 2. You SSH daemon has a very low timeout (default is 120 seconds in OpenSSH) 3. Very high load (cpu/memory/network) on the client and/or server
Some general suggestions follow. Check you SSH daemon configuration to find out what it's login grace time is. It may be in a configuration file or being set via a command-line argument. Enable debug logging on JSch. This will give you a better idea of what is happening, how long it is taking between establishing initial connection and receiving the SSH_MSG_DISCONNECT. -Keith On Tue, Apr 20, 2010 at 7:00 PM, Rohiini N <[email protected]> wrote: > Hi > > I understand that the login to the unix m/c is exceeding the grace time > defined.. but I want to know the possible reasons it is not connecting to > unix m/c. > I am establishing a JSCH session and while executing the statement > session.connect, it hangs and finally results in the following exception: > jcraft.jsch.jschException:SSH_MSG_DISCONNECT:11 Login_grace_time exceeded > en > at com.jcraft.jsch.session.read(Unknown Source) > at com.jcraft.jsch.UserAuth.start(Unknown Source) > at com.jcraft.jsch.UserAuthNone.start(Unknown Source) > at com.jcraft.jsch.session.connect(Unknown Source) > > This does not happen always.Most of the times, it executes properly. > > Thanks.. > Rohiini > > > [email protected] (Atsuhiko Yamanaka) wrote: ----- > > To: [email protected] > From: [email protected] (Atsuhiko Yamanaka) > Date: 04/20/2010 07:40AM > cc: [email protected] > Subject: Re: [JSch-users] SSH_MSG_DISCONNECT > > > Hi, > > +-From: Rohiini N <[email protected]> ---- > |_Date: Mon, 19 Apr 2010 21:32:19 +0530 __ > | > |I am making a SSH connection to a Unix m/c and I am getting a > |jschException - SSH_MSG_DISCONNECT - Login grace-time exceeded > |When it executes session.connect() . > |Can anyone please suggest what could be the possible reasons.. > |It works fine 3 out of 5 times randomly. only the other times, it fails. > > OpenSSH's "man sshd" has following descriptions, > > -g login_grace_time > Gives the grace time for clients to authenticate themselves (default > 120 seconds). If the client fails to authenticate the user within > this many seconds, the server disconnects and exits. A value of > zero indicates no limit. > > > Sincerely, > -- > Atsuhiko Yamanaka > JCraft,Inc. > 1-14-20 HONCHO AOBA-KU, > SENDAI, MIYAGI 980-0014 Japan. > Tel +81-22-723-2150 > +1-415-578-3454 > Skype callto://jcraft/ > > =====-----=====-----===== > Notice: The information contained in this e-mail > message and/or attachments to it may contain > confidential or privileged information. If you are > not the intended recipient, any dissemination, use, > review, distribution, printing or copying of the > information contained in this e-mail message > and/or attachments to it are strictly prohibited. If > you have received this communication in error, > please notify us by reply e-mail or telephone and > immediately and permanently delete the message > and any attachments. Thank you > > > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > JSch-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jsch-users > >
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