Bug 19467

Summary:	OpenSSH (as an rsync tunnel) blocks forever
Product:	Base System	Reporter:	dh <dh>
Component:	misc	Assignee:	Dag-Erling Smørgrav <des>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	4.0-STABLE
Hardware:	Any
OS:	Any

Description dh 2000-06-23 11:50:01 UTC

a large rsync operation (over OpenSSH)
transfers a few files and then
gets stuck (i.e. block forever in a select())

Fix: 

install the old ssh

  cd /usr/ports/security/ssh
  make install
  chmod a-x /usr/sbin/sshd
  chmod a-x /usr/bin/ssh
  rehash
How-To-Repeat: do a big rsync like this
rsync -ave ssh digitalbrain.com:/web/ /web/

you may have to re-run it 15 or more times before it'll complete
coz it'll keep getting stuck :(

Comment 1 Gregory Bond 2000-06-26 01:20:00 UTC

I have just used rsync-over-openSSH on 4.0-Stable to suck 700Mb from a 3.4 box 
(using rsync-over-SSH-from-ports) and it worked perfectly.

Comment 2 Gregory Bond 2000-06-29 07:31:36 UTC

> This mightnt have been clear from the PR but I was using OpenSSH 4.0 at 
> Both ends.
> If you do the same I hope you'll be able to duplicate the problem?

I can confirm that using rsync in 4.0-Stable with openSSH (from the crupto
repository on internat.freebsd.org) at both ends freezes doing moderate 
transfews - even less than 10Mb.  It seems to need lots of files, tho.

Comment 3 Sheldon Hearn freebsd_committer

2000-08-03 21:21:30 UTC

Responsible Changed
From-To: freebsd-bugs->kris

Kris, although the how-to-repeat is confused, it looks like 
this is a problem with OpenSSH.  Could you take a look?

Comment 4 Alan Larson 2000-10-10 07:09:58 UTC

  I have started seeing more and more hangs with SSH blocking in a select
as well.  Mostly it is seen with scp, but sometimes it will occur in a
terminal session.  It appears to be a race condition, but not sure.

  In my case, most (but not all) failures occur with the version installed
with the 4.0-release system, using 4.0-release running on a Compaq M300
(333 MHz celeron).  The remote end is a Solaris 2.5.1 running ssh 1.2.27,
via a DSL line, with a sonicwall translating IP addresses in front of the
solaris system.

  Other failures have occured with other systems, and have happened with
transfers in both directions.

	Alan

Comment 5 Kris Kennaway freebsd_committer

2000-11-13 02:27:03 UTC

Responsible Changed
From-To: kris->green

Green is taking over OpenSSH

Comment 6 Brian Feldman freebsd_committer

2003-07-13 05:11:17 UTC

Responsible Changed
From-To: green->des

ssh over to DES

Comment 7 Dag-Erling Smørgrav 2003-07-14 11:37:54 UTC

Does this still occur with newer versions of FreeBSD / OpenSSH?

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no

Comment 8 Dag-Erling Smørgrav freebsd_committer

2003-08-19 11:50:47 UTC

State Changed
From-To: open->closed

Feedback timeout.