zlib issue

[Michael Irwin]

Using 2.3.0, deploying from OS X 10.5.2 to FreeBSD 6.2-STABLE, I keep
getting the following notice after a task has run:

zlib(finalizer): the stream was freed prematurely.

It seemed to appear only after upgrading to 2.3.0, or at least I
didn't notice it before. The tasks do seem to be working properly in
spite of this notice.

Anyone else seeing this or have ideas on how to fix it?

[Jamis Buck]

I've seen that message appear in the Net::SSH unit tests, but because
they never appeared "in practice", I figured it was an artifact of the
tests. What version of Ruby do you have installed locally?

- Jamis

[Michael Irwin]

It's the default Ruby that comes w/ Leopard:

ruby 1.8.6 (2007-09-24 patchlevel 111) [universal-darwin9.0]

[Jamis Buck]

I can't seem to duplicate this...though to be honest I'm on 1.8.6
patchlevel 110 at the moment. Has anyone else seen this since
upgrading to 2.3?

I wonder if your server is enabling zlib by default. Does adding this
to your recipes help at all?

ssh_options[:compression] = "none"

If not, what ssh server software are you connecting to?

- Jamis

[Michael Irwin]

Yep, adding that removes the notice. I've had compression enabled in
~/.ssh/config for some time, so it seems 2.3.0 just started noticing
it.

Thanks for your help, Jamis.

[Jamis Buck]

Thanks for working with me to narrow that down. I'll start playing
with Net::SSH and compression and see if I can figure out what that
message is all about.

- Jamis

[Jamis Buck]

Interestingly, I can no longer duplicate this, even in the tests. If I
enable compression thus:

Net::SSH.start('localhost', 'jamis', :compression => "zl...@openssh.com
") do |ssh|
ssh.exec "hostname"
ssh.loop
end

It starts and finishes just fine. Enabling debugging output shows that
zlib is enabled...but I don't get that bizarre message. Maybe it's a
function of the zlib library you have installed? Maybe something else?

Has anyone else encountered this?

- Jamis

On May 6, 2008, at 9:21 AM, Michael Irwin wrote:

[Michael Irwin]

For curiosity's sake, I just tried deploying to a different server
(Linux this time) and I get the same message if I remove
ssh_options[:compression] = "none", so it would seem to be something
on the machine I'm deploying from. I'm not sure yet what it might
be. I'll try looking into it more when I get a chance.

Thanks for your help.

On May 6, 11:07 pm, Jamis Buck <ja...@37signals.com> wrote:
> Interestingly, I can no longer duplicate this, even in the tests. If I  
> enable compression thus:
>

>    Net::SSH.start('localhost', 'jamis', :compression => "z...@openssh.com

[Fotograf]

Hi,

> zlib(finalizer): the stream was freed prematurely.
>
> It seemed to appear only after upgrading to 2.3.0, or at least I
> didn't notice it before.  The tasks do seem to be working properly in
> spite of this notice.
>
> Anyone else seeing this or have ideas on how to fix it?

I'm having exactly the same problem:

** keeping 5 of 6 deployed releases
* executing "rm -rf /opt/infopark/deploy/releases/20080628131243"
servers: ["my.server.com"]
[my.server.com] executing command
command finished

zlib(finalizer): the stream was freed prematurely.

Appearing at the end of the deploy process.

F.

[Jamis Buck]

You can work around it by disabling compression:

ssh_options[:compression] = false

You might need to disable compression in your ~/.ssh/config, if you
have it set there.

- Jamis