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This page is prepared for Mahout committers. You need committer rights to create a new Mahout release.

Release Planning

Start a discussion on mahout-dev about having a release, questions to bring up include:

Any Unresolved JIRA issues for the upcoming release
Any Resolved or Closed JIRA issues missing a "Fix Version" that should be marked as fixed in this release?
Does any documentation need an update?
Who is going to be the "release engineer"?
What day should be targeted for the release ? Leave buffer time for a code freeze and release candidate testing; make sure at least a few people commit to having time to help test the release candidates around the target date.

Code Freeze

For 7-14 days prior to the release target date, have a "code freeze" where committers agree to only commit things if they:

Are documentation improvements (including fixes to eliminate Javadoc warnings)
Are new test cases that improve test coverage
Are bug fixes found because of improved test coverage
Are new tests and bug fixes for new bugs encountered by manually testing

Steps For Release Engineer

Before building release

Check that all tests pass after a clean compile: mvn clean test
Check that there are no remaining unresolved Jira issues with the upcoming version number listed as the "Fix" version
Publish any prev. unpublished Third Party Deps: Thirdparty Dependencies

Previewing the Artifacts

To build the artifacts:
1. mvn -Prelease package

Making a release

Check if documentation needs an update
Update the web site's news by updating a working copy of the SVN directory at https://svn.apache.org/repos/asf/mahout/site/new_website
Commit these changes. It is important to do this prior to the build so that it is reflected in the copy of the website included with the release for documentation purposes.
If this is your first release, add your key to the KEYS file. The KEYS file is located in Subversion at https://svn.apache.org/repos/asf/mahout/trunk/distribution/KEYS and copy it to the release directory. Make sure you commit your change. See http://www.apache.org/dev/release-signing.html.
Ensure you have set up standard Apache committer settings in
~/.m2/settings.xml as per this page.

Add a profile to your ~/.m2/settings.xml in the <profiles> section with:

  <profiles>
    <profile>
      <id>mahout_release</id>
      <properties>
        <gpg.keyname>YOUR PGP KEY NAME</gpg.keyname>
        <gpg.passphrase>YOUR SIGNING PASSCODE HERE</gpg.passphrase>
        <deploy.altRepository>mahout.releases::default::https://repository.apache.org/service/local/staging/deploy/maven2/</deploy.altRepository>
        <username>USERNAME</username>
        <deploy.url>https://repository.apache.org/service/local/staging/deploy/maven2/</deploy.url>
      </properties>
    </profile>
  </profiles>

You may also need to add the following to the <servers> section in ~/.m2/settings.xml in order to upload artifacts (as the -Dusername= -Dpassword= didn't work for Grant for 0.8, but this did):
```
<server>
  <id>apache.releases.https</id>
  <username>USERNAME</username>
  <password>PASSWORD</password>
</server>
```
Set environment variable MAVEN_OPTS to -Xmx1024m to ensure the tests can run
export _JAVA_OPTIONS="-Xmx1g"
If you are outside the US, then svn.apache.org may not resolve to the main US-based Subversion servers. (Compare the IP address you get for svn.apache.org with svn.us.apache.org to see if they are different.) This will cause problems during the release since it will create a revision and then immediately access, but, there is a replication lag of perhaps a minute to the non-US servers. To temporarily force using the US-based server, edit your equivalent of /etc/hosts and map the IP address of svn.us.apache.org to svn.apache.org.
Create the release candidate: mvn -Pmahout_release release:prepare release:perform. If you have problems authenticating to svn.apache.org, try adding to the command line -Dusername=[user] -Dpassword=[password]. If it screws up, do not clean or release:clean without first trying to do: release:rollback. This will likely save you time and do the right thing. If it doesn't work, then do clean and release:clean and also delete the tag from svn, if it was created. You may also have to rollback the version numbers in the POM files.
( If you want to skip test cases while rebuilding, use mvn -DpreparationGoals="clean compile" release:prepare release:perform)
Review the artifacts, etc. on the Apache Repository (using Sonatype's Nexus application) site: https://repository.apache.org/.
You will need to login using your ASF SVN credentials and then browse to the staging area.
Once you have reviewed the artifacts, you will need to "Close" out the staging area under Nexus, which then makes the artifacts available for others to see.
1. Log in to Nexus
2. Click the Staging Repositories link in the left hand menu
3. Click the Mahout staged one that was just uploaded by the release:perform target
4. Click Close in the toolbar. See https://docs.sonatype.org/display/Repository/Closing+a+Staging+Repository for a picture
5. Copy the "Repository URL" link to your email; it should be like https://repository.apache.org/content/repositories/orgapachemahout-024/
Call a VOTE on [email protected]. Votes require 3 days before passing. See Apache release policy for more info.
If there's a problem, you need to unwind the release and start all over.

mvn -Pmahout_release versions:set -DnewVersion=PREVIOUS_SNAPSHOT
mvn -Pmahout_release versions:commit
svn commit
svn rm https://svn.apache.org/repos/asf/mahout/tags/mahout-VERSION
Release the artifact in the Nexus Repository in the same way you Closed it earlier.
Add your key to the KEYS file at http://www.apache.org/dist/mahout/<version>/
Copy the assemblies and their supporting files (tar.gz, zip, tar.bz2, plus .asc, .md5, .pom, .sha1 files) to the ASF mirrors at: people.apache.org:/www/www.apache.org/dist/mahout/<version>/. You should make sure the group "mahout" owns the files and that they are read only (rrr- in UNIX-speak). See Guide To Distributing Existing Releases Through The ASF Mirrors and the links that are there.
Wait 24 hours for release to propagate to mirrors.
Clean up JIRA: Bulk close all X.Y JIRA issues. Mark the Version number as being released (see Manage Versions.) Add the next version (X.Y+1) if necessary.
Update release version on http://mahout.apache.org/ and http://en.wikipedia.org/wiki/Apache_Mahout
Send announcements to the user and developer lists.

Post Release

Versioning

Create the next version in JIRA (if it doesn't already exist)
Mark the version as "released" in JIRA (noting the release date)

Documentation

Change wiki to match current best practices (remove/change deprecations, etc)

Publicity

update freshmeat
!TheServerSide blurb
blog away
Update MLOSS entry: http://mloss.org/revision/view/387/. See Grant for details.

Related Resources

:TODO: Things To Cleanup in this document

TODO

more specifics about things to test before starting or after packaging (RAT, run scripts against example, etc...)
include info about Voting

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[CONF] Apache Mahout > How To Release

How To Release