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</ul> - <h2>Related Projects</h2> - <ul class="sidemenu"> - <li><a href="http://lucene.apache.org/";>Apache Lucene</a></li> - <li><a href="http://hadoop.apache.org/";>Apache Hadoop</a></li> - <li><a href="http://bigtop.apache.org/";>Apache Bigtop</a></li> - <li><a href="http://spark.apache.org/";>Apache Spark</a></li> - <li><a href="http://flink.apache.org/";>Apache Flink</a></li> - </ul> - </div> -</div> - - <div id="content-wrap" class="clearfix"> - <div id="main"> - - <h1 id="how-to-contribute">How to contribute</h1> - -<p><em>Contributing to an Apache project</em> is about more than just writing code â -itâs about doing what you can to make the project better. There are lots -of ways to contribute!</p> - -<p><a name="HowToContribute-BeInvolved"></a></p> -<h2 id="get-involved">Get Involved</h2> - -<p>Discussions at Apache happen on the mailing list. To get involved, you should join the <a href="/general/mailing-lists,-irc-and-archives.html">Mahout mailing lists</a>. In particular:</p> - -<ul> - <li>The <strong>user list</strong> (to help others)</li> - <li>The <strong>development list</strong> (to join discussions of changes) â This is the best place -to understand where the project is headed.</li> - <li>The <strong>commit list</strong> (to see changes as they are made)</li> -</ul> - -<p>Please keep discussions about Mahout on list so that everyone benefits. -Emailing individual committers with questions about specific Mahout issues -is discouraged. See <a href="http://people.apache.org/~hossman/#private_q";>http://people.apache.org/~hossman/#private_q</a> -. Apache has a number of <a href="http://www.apache.org/dev/contrib-email-tips";>email tips for contributors</a> as well.</p> - -<p><a name="HowToContribute-WhattoWorkOn?"></a></p> -<h2 id="what-to-work-on">What to Work On?</h2> - -<p>What do you like to work on? There are a ton of things in Mahout that we -would love to have contributions for: documentation, performance improvements, better tests, etc. -The best place to start is by looking into our <a href="https://issues.apache.org/jira/browse/MAHOUT";>issue tracker</a> and -seeing what bugs have been reported and seeing if any look like you could -take them on. Small, well written, well tested patches are a great way to -get your feet wet. It could be something as simple as fixing a typo. The -more important piece is you are showing you understand the necessary steps -for making changes to the code. Mahout is a pretty big beast at this -point, so changes, especially from non-committers, need to be evolutionary -not revolutionary since it is often very difficult to evaluate the merits -of a very large patch. Think small, at least to start!</p> - -<p>Beyond JIRA, hang out on the dev@ mailing list. Thatâs where we discuss -what we are working on in the internals and where you can get a sense of -where people are working.</p> - -<p>Also, documentation is a great way to familiarize yourself with the code -and is always a welcome addition to the codebase and this website. Feel free -to contribute texts and tutorials! Committers will make sure they are added -to this website, and we have a <a href="http://mahout.apache.org/developers/how-to-update-the-website.html";>guide for making website updates</a>. -We also have a <a href="http://mahout.apache.org/general/books-tutorials-and-talks.html";>wide variety of books and slides</a> for learning more about -machine learning algorithms.</p> - -<p>If you are interested in working towards being a committer, <a href="/developers/how-to-become-a-committer.html">general guidelines are available online</a>.</p> - -<p><a name="HowToContribute-ContributingCode(Features,BigFixes,Tests,etc...)"></a></p> -<h2 id="contributing-code-features-big-fixes-tests-etc">Contributing Code (Features, Big Fixes, Tests, etcâ¦)</h2> - -<p>This section identifies the ââoptimalââ steps community member can take to -submit a changes or additions to the Mahout code base. This can be new -features, bug fixes optimizations of existing features, or tests of -existing code to prove it works as advertised (and to make it more robust -against possible future changes).</p> - -<p>Please note that these are the âoptimalâ steps, and community members that -donât have the time or resources to do everything outlined on this below -should not be discouraged from submitting their ideas âas isâ per âYonik -Seeleyâs (Solr committer) Law of Patchesâ:</p> - -<p><em>A half-baked patch in Jira, with no documentation, no tests and no backwards compatibility is better than no patch at all.</em></p> - -<p>Just because you may not have the time to write unit tests, or cleanup -backwards compatibility issues, or add documentation, doesnât mean other -people donât. Putting your patch out there allows other people to try it -and possibly improve it.</p> - -<p><a name="HowToContribute-Gettingthesourcecode"></a></p> -<h2 id="getting-the-source-code">Getting the source code</h2> - -<p>First of all, you need to get the <a href="/developers/version-control.html">Mahout source code</a>. Most development is done on the âtrunkâ. Mahout mirrors its codebase on <a href="https://github.com/apache/mahout";>GitHub</a>. The first step to making a contribution is to fork Mahoutâs master branch to your GitHub repository.</p> - -<p><a name="HowToContribute-MakingChanges"></a></p> -<h2 id="making-changes">Making Changes</h2> - -<p>Before you start, you should send a message to the <a href="/general/mailing-lists,-irc-and-archives.html">Mahout developer mailing list</a> -(note: you have to subscribe before you can post), or file a ticket in our <a href="/developers/issue-tracker.html">issue tracker</a>. -Describe your proposed changes and check that they fit in with what others are doing and have planned for the project. Be patient, it may take folks a while to understand your requirements.</p> - -<ol> - <li>Create a JIRA Issue (if one does not already exist or you havenât already)</li> - <li>Pull the code from your GitHub repository</li> - <li>Ensure that you are working with the latest code from the <a href="https://github.com/apache/mahout";>apache/mahout</a> master branch.</li> - <li>Modify the source code and add some (very) nice features. - <ul> - <li>Be sure to adhere to the following points: - <ul> - <li>All public classes and methods should have informative Javadoc -comments.</li> - <li>Code should be formatted according to standard -<a href="http://www.oracle.com/technetwork/java/codeconventions-150003.pdf";>Java coding conventions</a>, -with two exceptions: - <ul> - <li>indent two spaces per level, not four.</li> - <li>lines can be 120 characters, not 80.</li> - </ul> - </li> - <li>Contributions should pass existing unit tests.</li> - <li>New unit tests should be provided to demonstrate bugs and fixes.</li> - </ul> - </li> - </ul> - </li> - <li>Commit the changes to your local repository.</li> - <li>Push the code back up to your GitHub repository.</li> - <li>Create a <a href="https://help.github.com/articles/creating-a-pull-request";>Pull Request</a> to the to apache/mahout repository on Github. - <ul> - <li>Include the corresponding JIRA Issue number and description in the title of the pull request: - <ul> - <li>ie. MAHOUT-xxxx: < JIRA-Issue-Description ></li> - </ul> - </li> - </ul> - </li> - <li>Committers and other members of the Mahout community can then comment on the Pull Request. Be sure to watch for comments, respond and make any necessary changes.</li> -</ol> - -<p>Please be patient. Committers are busy people too. If no one responds to your Pull Request after a few days, please make friendly reminders on the mailing list. Please -incorporate otherâs suggestions into into your changes if you think theyâre reasonable. Finally, remember that even changes that are not committed are useful to the community.</p> - -<p><a name="HowToContribute-UnitTests"></a></p> -<h4 id="unit-tests">Unit Tests</h4> - -<p>Please make sure that all unit tests succeed before creating your Pull Request.</p> - -<p>Run <em>mvn clean test</em>, if you see <em>BUILD SUCCESSFUL</em> after the tests have finished, all is ok, but if you see <em>BUILD FAILED</em>, -please carefully read the errors messages and check your code.</p> - -<h4 id="dos-and-donts">Doâs and Donâts</h4> - -<p>Please do not:</p> - -<ul> - <li>reformat code unrelated to the bug being fixed: formatting changes should -be done in separate issues.</li> - <li>comment out code that is now obsolete: just remove it.</li> - <li>insert comments around each change, marking the change: folks can use -subversion to figure out whatâs changed and by whom.</li> - <li>make things public which are not required by end users.</li> -</ul> - -<p>Please do:</p> - -<ul> - <li>try to adhere to the coding style of files you edit;</li> - <li>comment code whose function or rationale is not obvious;</li> - <li>update documentation (e.g., ââpackage.htmlââ files, the website, etc.)</li> -</ul> - -<p><a name="HowToContribute-Review/ImproveExistingPatches"></a></p> -<h2 id="reviewimprove-existing-pull-requests">Review/Improve Existing Pull Requests</h2> - -<p>If thereâs a JIRA issue that already has a Pull Request with changes that you think are really good, and works well for you â please add a comment saying so. If thereâs room -for improvement (more tests, better javadocs, etcâ¦) then make the changes on your GitHub branch and add a comment about them. If a lot of people review a Pull Request and give it a -thumbs up, thatâs a good sign for committers when deciding if itâs worth spending time to review it â and if other people have already put in -effort to improve the docs/tests for an issue, that helps even more.</p> - -<p>For more information see <a href="http://mahout.apache.org/developers/github.html";>Handling GitHub PRs</a>.</p> - - - </div> - </div> -</div> - <footer class="footer" align="center"> - <div class="container"> - <p> - Copyright © 2014-2016 The Apache Software Foundation, Licensed under - the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version 2.0</a>. - <br /> - Apache Mahout, Mahout, Apache, the Apache feather logo, and the elephant rider logo are either registered trademarks or trademarks of <a href="http://www.apache.org/foundation/marks/";>The Apache Software Foundation</a> in the United States and other countries. - </p> - </div> - </footer> - - <script src="/assets/themes/mahout-retro/js/jquery-1.9.1.min.js"></script> - <script src="/assets/themes/mahout-retro/js/bootstrap.min.js"></script> - <script> - (function() { - var cx = '012254517474945470291:vhsfv7eokdc'; - var gcse = document.createElement('script'); - gcse.type = 'text/javascript'; - gcse.async = true; - gcse.src = (document.location.protocol == 'https:' ? 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</ul> - <h2>Related Projects</h2> - <ul class="sidemenu"> - <li><a href="http://lucene.apache.org/";>Apache Lucene</a></li> - <li><a href="http://hadoop.apache.org/";>Apache Hadoop</a></li> - <li><a href="http://bigtop.apache.org/";>Apache Bigtop</a></li> - <li><a href="http://spark.apache.org/";>Apache Spark</a></li> - <li><a href="http://flink.apache.org/";>Apache Flink</a></li> - </ul> - </div> -</div> - - <div id="content-wrap" class="clearfix"> - <div id="main"> - - <h1 id="how-to-release-mahout">How To Release Mahout</h1> - -<p><em>This page is prepared for Mahout committers. You need committer rights to -create a new Mahout release.</em></p> - -<p><a name="HowToRelease-ReleasePlanning"></a></p> -<h1 id="release-planning">Release Planning</h1> - -<p>Start a discussion on mahout-dev about having a release, questions to bring -up include:</p> - -<ul> - <li>Any <a href="-https://issues.apache.org/jira/secure/issuenavigator!executeadvanced.jspa?jqlquery=project+%3d+mahout+and+resolution+%3d+unresolved+and+fixversion+%3d+%220.6%22&runquery=true&clear=true.html";>Unresolved JIRA issues for the upcoming release </a></li> - <li>Any <a href="-https://issues.apache.org/jira/secure/issuenavigator!executeadvanced.jspa?jqlquery=project+%3d+mahout+and+%28status+%3d+resolved+or+status+%3d+closed%29+and+fixversion+is+null+and+resolution+%3d+fixed&runquery=true&clear=true.html";>Resolved or Closed JIRA issues missing a âFix Versionâ </a> - that should be marked as fixed in this release?</li> - <li>Does any documentation need an update?</li> - <li>Who is going to be the release engineer?</li> - <li>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.</li> -</ul> - -<p><a name="HowToRelease-CodeFreeze"></a></p> -<h1 id="code-freeze">Code Freeze</h1> - -<p>For 7-14 days prior to the release target date, have a âcode freezeâ where -committers agree to only commit things if they:</p> - -<ul> - <li>Are documentation improvements (including fixes to eliminate Javadoc -warnings)</li> - <li>Are new test cases that improve test coverage</li> - <li>Are bug fixes found because of improved test coverage</li> - <li>Are new tests and bug fixes for new bugs encountered by manually testing</li> -</ul> - -<p><a name="HowToRelease-StepsForReleaseEngineer"></a></p> -<h1 id="steps-for-release-engineer">Steps For Release Engineer</h1> - -<p><a name="HowToRelease-Beforebuildingrelease"></a></p> -<h2 id="before-building-release">Before building release</h2> -<ol> - <li>Check that all tests pass after a clean compile: <code class="highlighter-rouge">mvn clean test</code></li> - <li>Check that there are no remaining unresolved Jira issues with the upcoming version number listed as the âFixâ version</li> - <li>Publish any previously unpublished third-party dependenciess: <a href="thirdparty-dependencies.html">Thirdparty Dependencies</a></li> - <li>Build and preview resulting artifacts: - <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nb">cd </span>buildtools - ./build-all-release-jars.sh -</code></pre></div> </div> - </li> - <li>Make sure packages will come out looking right</li> -</ol> - -<p><a name="HowToRelease-Makingarelease"></a></p> -<h2 id="making-a-release">Making a release</h2> -<ul> - <li>Check if documentation needs an update</li> - <li><em>Needs correction</em> Update the web siteâs news by updating a working copy of the SVN directory at https://svn.apache.org/repos/asf/mahout/site/new_website</li> - <li><em>Needs clarification</em> 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.</li> - <li>If this is your first release, add your key to the KEYS file (located on GitHub at https://github.com/apache/mahout/master/distribution/KEYS) and copy it to the release directory. Make sure you commit your change. See http://www.apache.org/dev/release-signing.html.</li> - <li>Ensure you have set up standard Apache committer settings in - ~/.m2/settings.xml as per <a href="http://maven.apache.org/developers/committer-settings.html";>this page</a> -.</li> - <li>Add a profile to your <code class="highlighter-rouge">~/.m2/settings.xml</code> in the <code class="highlighter-rouge"><profiles></code> section with:</li> -</ul> - -<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code><profiles> - <profile> - <id>mahout_release</id> - <properties> - <gpg.keyname>1234BEEF</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> -</code></pre></div></div> - -<ul> - <li>You may also need to add the following to the <code class="highlighter-rouge"><servers></code> section in <code class="highlighter-rouge">~/.m2/settings.xml</code> in order to upload artifacts (as the <code class="highlighter-rouge">-Dusername=</code> <code class="highlighter-rouge">-Dpassword=</code> didnât work for gsingers for 0.8, but this did; n.b. it didnât work for akm for the 0.13 release): -```</li> -</ul> -<server> - <id>apache.releases.https</id> - <username>USERNAME</username> - <password>PASSWORD</password> -</server> -<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> -* *Clarify which env var is better or choose one* 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,apache-release release:prepare release:perform` -* If you have problems authenticating to svn.apache.org, try adding to the command line `-Dusername=USERNAME -Dpassword=PASSWORD` -* If there is an issue first try doing: `mvn -Dmahout-release,apache-release release:rollback` followed by `mvn -Dmahout-release,apache-release,hadoop2 release:clean` as this will likely save you time and do the right thing. 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 - 1. Click the Staging Repositories link in the left hand menu - 1. Click the Mahout staged artifact that was just uploaded by the -release:perform target - 1. Click Close in the toolbar. See https://docs.sonatype.org/display/Repository/Closing+a+Staging+Repository for a picture - 1. Copy the "Repository URL" link to your email; it should be formed like https://repository.apache.org/content/repositories/orgapachemahout-024/ -* Call a VOTE on d...@mahout.apache.org. Votes require 3 days before passing. See Apache [release policy|http://www.apache.org/foundation/voting.html#ReleaseVotes] for more info. -* If there's a problem, you need to unwind the release and start all over. - -</code></pre></div></div> -<p>mvn -Pmahout-release,apache-release versions:set -DnewVersion=PREVIOUS_SNAPSHOT -mvn -Pmahout-release,apache-release versions:commit -git commit -git push âdelete apache <tagname> (deletes the remote tag) -git tag -d tagname (deletes the local tag) -```</tagname></p> - -<ul> - <li>Release the artifact in the Nexus Repository in the same way you closed it earlier.</li> - <li>Add your key to the KEYS file at http://www.apache.org/dist/mahout/<version>/</version></li> - <li>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 (-r--r--r-- in UNIX-speak). See [Guide To Distributing Existing Releases Through The ASF Mirrors|http://jakarta.apache.org/site/convert-to-mirror.html?Step-By-Step] and the links that are there. -</version> <ul> - <li>cd /www/www.apache.org/dist/mahout</li> - <li>mkdir <VERSION></VERSION></li> - <li>cd <VERSION></VERSION></li> - <li>wget -e robots=off âno-check-certificate -np -r -https://repository.apache.org/content/groups/public/org/apache/mahout/apache-mahout-distribution/<VERSION>/</VERSION></li> - <li>mv -repository.apache.org/content/groups/public/org/apache/mahout/mahout-distribution/0.8/* -.</li> - <li>rm -rf repository.apache.org/</li> - <li>rm index.html</li> - </ul> - </li> - <li>Wait 24 hours for release to propagate to mirrors.</li> - <li>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.</li> - <li>Update release version on http://mahout.apache.org/ and -http://en.wikipedia.org/wiki/Apache_Mahout -* -https://cwiki.apache.org/confluence/display/MAHOUT/How+To+Update+The+Website</li> - <li>Send announcements to the user and developer lists.</li> -</ul> - -<p>See also:</p> - -<ul> - <li>http://maven.apache.org/developers/release/releasing.html -* -http://www.sonatype.com/books/nexus-book/reference/staging-sect-deployment.html</li> - <li>http://www.sonatype.com/books/nexus-book/reference/index.html</li> -</ul> - -<h3 id="post-release">Post Release</h3> -<h2 id="versioning">Versioning</h2> -<ul> - <li>Create the next version in JIRA (if it doesnât already exist)</li> - <li>Mark the version as âreleasedâ in JIRA (noting the release date)</li> -</ul> - -<h2 id="documentation">Documentation</h2> -<ul> - <li>Change wiki to match current best practices (remove/change deprecations, -etc)</li> -</ul> - -<h2 id="publicity">Publicity</h2> -<ul> - <li>update freshmeat</li> - <li>blog away</li> - <li>Update MLOSS entry: http://mloss.org/revision/view/387/. See Grant for -details.</li> -</ul> - -<h2 id="related-resources">Related Resources</h2> - -<ul> - <li>http://www.apache.org/dev/#releases</li> - <li>http://www.apache.org/dev/#mirror</li> -</ul> - -<h1 id="todo-things-to-cleanup-in-this-document">TODO: Things To Cleanup in this document</h1> - -<ul> - <li>more specifics about things to test before starting or after packaging -(RAT, run scripts against example, etcâ¦)</li> - <li> - <table> - <tbody> - <tr> - <td>include info about [Voting</td> - <td>http://www.apache.org/foundation/voting.html#ReleaseVotes]</td> - </tr> - </tbody> - </table> - </li> -</ul> - - </div> - </div> -</div> - <footer class="footer" align="center"> - <div class="container"> - <p> - Copyright © 2014-2016 The Apache Software Foundation, Licensed under - the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version 2.0</a>. - <br /> - Apache Mahout, Mahout, Apache, the Apache feather logo, and the elephant rider logo are either registered trademarks or trademarks of <a href="http://www.apache.org/foundation/marks/";>The Apache Software Foundation</a> in the United States and other countries. - </p> - </div> - </footer> - - <script src="/assets/themes/mahout-retro/js/jquery-1.9.1.min.js"></script> - <script src="/assets/themes/mahout-retro/js/bootstrap.min.js"></script> - <script> - (function() { - var cx = '012254517474945470291:vhsfv7eokdc'; - var gcse = document.createElement('script'); - gcse.type = 'text/javascript'; - gcse.async = true; - gcse.src = (document.location.protocol == 'https:' ? 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