Fwd: [JENKINS] [IMPORTANT] - Jenkins Migration and Upgrade (And JDK7 deprecation)

[Josh Elser <el...@apache.org>]

tl;dr Infra is upgrading Jenkins in 2 weeks and Java7 Maven jobs 
may/may-not work after this. See explanation below from [1]:

<snip>
Users with jobs configured with the "Maven project" type may not be able 
to use Java 7 for their Maven jobs. The correct behavior is not 
guaranteed so proceed at your own risk. The Maven Project uses Jenkins 
Remoting to establish "interceptors" within the Maven executable. 
Because of this, Maven uses Remoting and other Jenkins core classes, and 
this behavior may break an update.
</snip>

[1] https://jenkins.io/blog/2017/04/10/jenkins-has-upgraded-to-java-8/


-------- Forwarded Message --------
Subject: [JENKINS]  [IMPORTANT] - Jenkins Migration and Upgrade (And 
JDK7 deprecation)
Date: Tue, 27 Jun 2017 17:03:13 +1000
From: Gavin McDonald <ga...@16degrees.com.au>
Reply-To: builds@apache.org, builds@apache.org
To: builds@apache.org
CC: ASF Operations <op...@apache.org>

ASF Jenkins Master Migration and Upgrade on :-


Location	                                        Local Time	 
                            Time Zone	UTC Offset
Melbourne (Australia - Victoria)	Sunday, 16 July 2017 at 10:00:00 am 
AEST	        UTC+10 hours
New York (USA - New York)	        Saturday, 15 July 2017 at 8:00:00 pm 
EDT	                UTC-4 hours
Corresponding UTC (GMT)	        Sunday, 16 July 2017 at 00:00:00	 	

Hi All,

A few things are going to happen in just over 2 weeks.

1. Migration of Jenkins to a new host. A Jenkins Master module and yaml 
have been puppetized and ready to go.
     What we need to do to migrate the Master away from its current host 
is turn off the old service. Perform a final     rsync of data and 
perform the migration tasks.
     As we intend to preserve history for jobs this will take some time.
     At the same time as doing this migration to a new host, all slave 
connections will be updated (see below.)
     I have no current estimate of downtime, but it will run into 
several hours. We do plan to run this migration on a     Sunday at the 
lowest part of Jenkins usual usage.

2. Upgrade of Jenkins - Jenkins project released a new LTS release, 
version 2.60.1. This is a major release and breaks     Jenkins in terms 
of Maven jobs for JDK 7 in the same way that it happened for Maven and 
JDK 6 a few months back.

     The infra team (mainly myself) got quite some feedback on not 
supplying advance notice of this breakage. That upgrade     however was 
necessary due to security fixes that required our upgrade.  This email 
serves as advance warning of the     upcoming upgrade of Jenkins, the 
downtime due to the migration of the service to a new host; and notice 
of the breakage     to JDK 7 that the upgrade brings.

     Please familiarise yourself with the Jenkins LTS upgrade notes at [1].
     In particular please note:-

     “…2.60.1 is the first Jenkins LTS release that requires Java 8 to 
run. If you're using the Maven Project type, please note that it needs 
to use a JDK capable of running Jenkins, i.e. JDK 8 or up. If you 
configure an older JDK in a Maven Project, Jenkins will attempt to find 
a newer JDK and use that automatically. If your SSH Slaves fail to start 
and you have the plugin install the JRE to run them, make sure to update 
SSH Slaves Plugin to at least version 1.17 (1.20 recommended).
Changes since 2.60:
Fix for NullPointerException while initiating some SSH connections 
(regression in 2.59). (issue 44120 
<https://issues.jenkins-ci.org/browse/JENKINS-44120>)
Notable changes since 2.46.3:
Jenkins (master and agents) now requires Java 8 to run. (issue 27624 
<https://issues.jenkins-ci.org/browse/JENKINS-27624> <>, issue 42709 
<https://issues.jenkins-ci.org/browse/JENKINS-42709> <>, pull 2802 
<https://github.com/jenkinsci/jenkins/pull/2802>, announcement blog post 
<https://jenkins.io/blog/2017/04/10/jenkins-has-upgraded-to-java-8/>)

…”

There are over 30 other enhancements/fixes since 2.46.2 which we 
currently run so please do take a note of those.

Recap: In just over 2 weeks, downtime for a migration AND upgrade is 
planned.
Please do not rely on Jenkins at all for that weekend if you use it in 
your release workflow.

Please do take this notice back to your dev lists.
Any questions or concerns please email back to builds@apache.org 
<ma...@apache.org> only.
Thanks

Gav…

[1] - https://jenkins.io/changelog-stable/