Hi,
+-From: Rihui Luo <[EMAIL PROTECTED]> ---------
|_Date: Mon, 30 Jul 2007 16:06:04 -0700 (PDT) __
|
|I have two clients, every hour each client connects to a SSH server,
|transfer files, then disconnect.
Are you disconnecting the channel or session? Is the TCP connection really
dropped?
| Initially it works fine, but after a
|couple of days, one of the clients hang. Here's the stack trace from jdb,
|it seems to me that connect blocks at read indefinitely.
|main[1] where
| [1] java.net.SocketInputStream.socketRead0 (native method)
| [2] java.net.SocketInputStream.read (null)
| [3] java.net.SocketInputStream.read (null)
| [4] com.jcraft.jsch.IO.getByte (null)
| [5] com.jcraft.jsch.Session.connect (null)
| [6] com.jcraft.jsch.Session.connect (null)
It seems to me that jsch just has been waiting for the sshd's version string.
I mean that, after openning the TCP socket to sshd, jsch has waited for the
string; for example, "SSH-2.0-OpenSSH_4.3", but sshd has not sent it
by some reason.
What kind of sshd are you connecting to? IMHO, the problem is not in jsch.
To work around such infinite block, you may be able to use
Session#connect(int connectTimeout);
and, at the timeout, how about trying the making connection again?
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
Fax +81-22-224-8773
Skype callto://jcraft/
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