• First, you have to get an access to Jenkins (http://builds.apache.org). To get an access to Jenkins, Ask your PMC chair
   
• If you get an access, open builds.apache.org and login with your account
• Jenkins > New Item : Enter item name and check Maven project. 
• To trigger Github pull request builds, Follow the steps in this link: https://blogs.apache.org/infra/entry/github_pull_request_builds_now
  
  
• Set JDK version to 1.7
• Check "Restrict where this project can be run" and add "ubuntu" into the "Label Expression" filed. The builder will be executed on ubuntu machines. Therefore, to build in windows machine, we have to create another new item and add "windows1||windows2" into the "Label Expression". 
• In Build, write "clean install" into "Goals and options" 
• In Post Steps, check "Run regardless of build result"
• If you want to update relevant JIRA issues whenever Jenkins builds the related patch, then add "Update JIRA relevant issues" in Post-build Action. To trigger this post build action, we have to insert JIRA issue number into our commit message. Here is an example commit message: "[REEF-11] Jenkins integration test".  
• If you have any problem using Jenkins, please file a ticket to INFRA (https://issues.apache.org/jira/browse/INFRA ) or send an email to builds@apache.org
  
  
• Here is an example setting:
• 
  
  

Rebuild 

• Open http://builds.apache.org and login with your account
• Access a build link what you want to rebuild. (ex. https://builds.apache.org/job/Reef-pull-request-ubuntu/187/ ) 
• Click rebuild button  
  

Reconfiguration

• Open http://builds.apache.org and login with your account
• Click "Configuration" in https://builds.apache.org/job/Reef-pull-request-ubuntu/ or https://builds.apache.org/job/Reef-pull-request-windows
• Change setting and click the save button

2. Travis CI

Travis-CI.org provides free service for Open Source projects.

Setup

• Request Apache INFRA team to enable Travis-CI for GitHub repository: https://issues.apache.org/jira/browse/INFRA-10567

• Make `.travis.yml` file at the top folder of projects. JDK7 and JDK8 are tested simultaneously.

  .travis.yml

  sudo: false
  
  language: java
  
  git:
    depth: 150
  
  jdk:
    - oraclejdk7
    - oraclejdk8
  
  env: PATH=$PATH:$HOME/local/bin
  
  cache:
    directories:
    - $HOME/.m2
    - $HOME/local
  
  notifications:
    email: false
  
  install: ./dev/travis-install-dependencies.sh
  
  script:
    mvn clean install -q -ff -Dsurefire.useFile=false -DLOG_LEVEL=WARN