Thanks for pointing out the bug Nathan! I'll add my vote.

On Thursday, July 2, 2015 at 8:11:28 PM UTC+3, Nathan Brown wrote:
>
> Actually I was wrong. Forgot to tear town my control sockets when swapping 
> server versions.
>
> This is entirely the fault of the ConsoleKit patch, at least for Ubuntu 
> 14.04
>
> https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1334916/
>
> On Thursday, July 2, 2015 at 6:04:54 AM UTC-7, Nathan Brown wrote:
>>
>> I ran into this today and played around with different server and client 
>> versions of OpenSSH. My environment consists of servers running Ubuntu 
>> 14.04 and clients running OSX.
>>
>> If you run OSX, this problem will go away if you `brew install openssh`.
>>
>> On the server I tested these openssh versions:
>> - Default: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014
>> - Latest: OpenSSH_6.9p1, OpenSSL 1.0.1f 6 Jan 2014
>>
>> On the client I tested these openssh clients:
>> - Default: OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
>> - Latest (brew): OpenSSH_6.8p1, OpenSSL 1.0.2a 19 Mar 2015
>>
>>
>> On Monday, June 15, 2015 at 6:22:55 AM UTC-7, Shay Rojansky wrote:
>>>
>>> FYI, after working with paramiko for a while I still have issues when 
>>> delegating multiple tasks to the same host, this time with the error "Error 
>>> reading SSH protocol banner".
>>>
>>> On Wed, Jun 10, 2015 at 7:31 PM, Shay Rojansky <[email protected]> wrote:
>>>
>>>> Great to hear, thanks!
>>>>
>>>> On Wed, Jun 10, 2015 at 5:11 PM, Brian Coca <[email protected]> wrote:
>>>>
>>>>> the issue is that under normal operation you are hitting different
>>>>> hosts, when delegating you may have several forks hitting the same
>>>>> host, which when you factor in control master ssh sockets, it can get
>>>>> complicated. paramiko avoids this by not having a shared resource.
>>>>>
>>>>> in 2.0 we've added some code that does a better job of dealing with
>>>>> this multiconcurrency when using ssh.
>>>>>
>>>>> On Wed, Jun 10, 2015 at 5:39 AM, Shay Rojansky <[email protected]> wrote:
>>>>> > I can confirm that switching to paramiko appears to solve the 
>>>>> problem in my
>>>>> > case. This seems like a bit of a shame openssh is the recommended 
>>>>> way to go
>>>>> > (more features).
>>>>> >
>>>>> > On Mon, Jun 8, 2015 at 8:05 PM, Shay Rojansky <[email protected]> 
>>>>> wrote:
>>>>> >>
>>>>> >> I was just looking into that, is that a reliable workaround?
>>>>> >>
>>>>> >> Will try soon and report the results.
>>>>> >>
>>>>> >> On Mon, Jun 8, 2015 at 8:02 PM, Brian Coca <[email protected]> 
>>>>> wrote:
>>>>> >>>
>>>>> >>> have you tried switching to paramiko as your connection?
>>>>> >>>
>>>>> >>> On Mon, Jun 8, 2015 at 1:00 PM, Shay Rojansky <[email protected]> 
>>>>> wrote:
>>>>> >>> > I have this issue as well: running a play which delegates some 
>>>>> action
>>>>> >>> > to the
>>>>> >>> > same host pretty consistently fails with the above error. 
>>>>> Findings are
>>>>> >>> > exactly the same as below, including the -f 1 behavior.
>>>>> >>> >
>>>>> >>> > Any ideas on workarounds?
>>>>> >>> >
>>>>> >>> >
>>>>> >>> > On Friday, May 29, 2015 at 3:36:33 PM UTC+3, Christian Rusa 
>>>>> wrote:
>>>>> >>> >>
>>>>> >>> >> I can confirm this problem.
>>>>> >>> >>
>>>>> >>> >> In my case it is a playbook which creates a configuration file 
>>>>> for the
>>>>> >>> >> server on the backupserver.
>>>>> >>> >>
>>>>> >>> >> If I run this playbook against 1 host it works.
>>>>> >>> >> If I run it against a group of hosts it fails.
>>>>> >>> >> If I run it against a group of host using -f 1 as parameter it 
>>>>> works.
>>>>> >>> >>
>>>>> >>> >> Error is always the SSH Error: Shared connection to xxxxx 
>>>>> closed.
>>>>> >>> >>
>>>>> >>> >> Ansible version is 1.9-0.git201503262158~unstable
>>>>> >>> >>
>>>>> >>> >>
>>>>> >>> >>
>>>>> >>> >>
>>>>> >>> >> On Monday, May 11, 2015 at 4:47:14 PM UTC+2, Cory Wagner wrote:
>>>>> >>> >>>
>>>>> >>> >>> I didn't try with serial, but I have not had an issue when 
>>>>> running
>>>>> >>> >>> the
>>>>> >>> >>> same playbook against one or two delegates.
>>>>> >>> >>>
>>>>> >>> >>> On Thursday, April 30, 2015 at 9:35:57 AM UTC-5, Brian Coca 
>>>>> wrote:
>>>>> >>> >>>>
>>>>> >>> >>>> this sounds like a probably race condition with the per host 
>>>>> forks
>>>>> >>> >>>> interfering with each other, try setting serial: 1 to confirm.
>>>>> >>> >>>>
>>>>> >>> >>>>
>>>>> >>> >>>>
>>>>> >>> >>>> --
>>>>> >>> >>>> Brian Coca
>>>>> >>> >
>>>>> >>> > --
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>>>>> >>> > To view this discussion on the web visit
>>>>> >>> >
>>>>> >>> > 
>>>>> https://groups.google.com/d/msgid/ansible-project/e459b939-0395-4d33-acc9-224ee29f0fe9%40googlegroups.com
>>>>> .
>>>>> >>> >
>>>>> >>> > For more options, visit https://groups.google.com/d/optout.
>>>>> >>>
>>>>> >>>
>>>>> >>>
>>>>> >>> --
>>>>> >>> Brian Coca
>>>>> >>>
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>>>>> .
>>>>> >>> For more options, visit https://groups.google.com/d/optout.
>>>>> >>
>>>>> >>
>>>>> >
>>>>> > --
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>>>>> .
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>>>>> > For more options, visit https://groups.google.com/d/optout.
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Brian Coca
>>>>>
>>>>> --
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>>>>> .
>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>
>>>>
>>>>
>>>

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