>[Shameless plug]
>http://developer-blog.cloudbees.com/2013/10/ssh-slaves-reloaded.html
>[/Shameless plug]

Enterprise edition only isn't it ? ;(


> Anyway, in 1.3 vs 1.2 I didn't change the ssh connection logic, similarly
there is no changes outside of credentials since 0.27.
>We'd really need to know more about the ssh server that is being connected
to... also it may be a keep-alive failure... not sure how much I can
improve that with the trilead impl.

Problems occurs with CentOS 6.4 (openssh-server-5.3p1-84.1.el6.x86_64) and
openSUSE 12.2 (openssh-6.0p1-2.3.3.x86_64), both in 64bits.

It shouldn't be related to keep-alive as problem happen also by the end of
build, so there is still activity.

On slave side, I noticed when probem occurs

Oct  7 01:30:53 swf-slave-1-opensuse-64 systemd-logind[539]: Removed
session 652.
Oct  7 01:31:03 swf-slave-1-opensuse-64 sshd[20742]: Accepted publickey for
cijenka from 10.128.59.11 port 35785 ssh2
Oct  7 01:31:03 swf-slave-1-opensuse-64 systemd-logind[539]: New session
1189 of user cijenka.
Oct  7 01:31:03 swf-slave-1-opensuse-64 sshd[20747]: subsystem request for
sftp by user cijenka

A normal behavior is :

Oct  7 09:20:12 swf-slave-1-opensuse-64 sshd[20747]: subsystem request for
sftp by user cijenka
Oct  7 09:20:13 swf-slave-1-opensuse-64 sshd[20747]: Received disconnect
from 10.128.59.11: 11: Closed due to user request.
Oct  7 09:20:13 swf-slave-1-opensuse-64 systemd-logind[539]: Removed
session 1189.
Oct  7 09:20:14 swf-slave-1-opensuse-64 sshd[14817]: Accepted publickey for
cijenka from 10.128.59.11 port 40125 ssh2
Oct  7 09:20:14 swf-slave-1-opensuse-64 systemd-logind[539]: New session
1277 of user cijenka.
Oct  7 09:20:14 swf-slave-1-opensuse-64 sshd[14821]: subsystem request for
sftp by user cijenka

When problem appears, there is no "Closed due to user request" phase.

Only change we notice in our configuration :

* EnvInject is used by these jobs
* We upgraded to Jenkins 1.529

And we're not alone :

* https://issues.jenkins-ci.org/browse/JENKINS-18781
* https://issues.jenkins-ci.org/browse/JENKINS-18879

I notice something weird for some time, still related to slave :

if I try to get slave log, ie http://myjenkins/computer/myslavelog, nothing
appears except a spinning wheel on top ;(

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