[JSch-users] JSchException "timeout in wating for rekeying process." caused by waiting for user answer

[Alexander K. <ale...@je...>]

Hi!

We are using JSch library 0.1.52 and have a difficulty dealing with 
timeout on establishing connection. The problem is that after a user 
answers prompt dialog "The authenticity of host '***' can't be 
established. RSA key fingerprint is ***. Are you sure you want to 
continue connecting?" JSchException with "timeout in wating for rekeying 
process." message is thrown by JSch Session (under some circumstances):
     com.jcraft.jsch.JSchException: timeout in wating for rekeying process.
         at com.jcraft.jsch.Session.write(Session.java:1339)
         at com.jcraft.jsch.Session.send_newkeys(Session.java:695)
         at com.jcraft.jsch.Session.connect(Session.java:348)
         ...

Steps to reproduce:
1. Be sure that the host we are connecting to is not in 
~/.ssh/known_hosts (e.g. empty it)
2. Set com.jcraft.jsch.Session#setUserInfo(UserInfo) with implementation 
that returns result from com.jcraft.jsch.UserInfo#promptYesNo() in 
several seconds
3. Invoke com.jcraft.jsch.Session#connect(int) with timeout value that 
is less than in step 2
4. Get JSchException

It seems that timeout value passed to Session#connect(int) method 
applies both to user answer time from UI and server interaction time. 
Might it be justly if user interaction had been excluded from timeout value?

Kind regards,
Alexander