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Usage question

Our friendly volunteer community regularly answers OptaPlanner questions on StackOverflow.

Question
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Opinionated questions aren't welcome on StackOverflow,
so those belong on our discussion forum below.

To get a helpful answer, follow the StackOverflow guidelines such as:

  • Get to the point. Keep it short.

  • Be crystal clear. Reread your question before posting it.

  • Add relevant technical details: stacktrace, code snippet, …​

Create an issue

If you’ve found a bug, please open a ticket in our issue tracker with a reproducer:

Create an issue in JIRA
Do not use our issue tracker for questions.

Contributor contact

If you’re working on a contribution or want to start an opinionated discussion, join our discussion forum or mail directly through optaplanner-dev@googlegroups.com.

It’s recommended to build OptaPlanner from source before starting a discussion there.

Start/view discussions on our forum
Please don't cross post to both our forum and StackOverflow.

Customer support

For a fast and detailed answer, open a support case with Red Hat.

Red Hat sponsors this open source project by employing its core developers. They have a dedicated QA and support team around this project.

Open a support case

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Chat

Use an IRC client to connect to Freenode (such as chat.freenode.net).

  • For questions, try the channels #optaplanner and #drools.

  • If you’re working on a contribution, come talk to us on #optaplanner-dev. The core developers are there during working hours (depending on their timezone).

Latest blog posts
  • Scheduling Voxxed Days Zurich 2018 with OptaPlanner
    Mon 19 February 2018
  • Java Reflection, but much faster
    Tue 9 January 2018
  • Does A.I. include constraint solvers?
    Thu 7 September 2017
  • Optimize your problems using KIE Execution Server
    Fri 18 August 2017
  • Visualize the score and the constraints
    Mon 13 March 2017
  • Formula for measuring unfairness
    Fri 3 February 2017
  • How to become US president with less than a quarter of the votes
    Tue 6 December 2016
Archive
Latest releases
  • 7.7.0.Final released
    Wed 4 April 2018
Upcoming events
  • Red Hat Summit
    San Francisco, CA, USA - Tue 8 May 2018
    • Employee shift rostering optimization A.I. with OptaPlanner by Geoffrey De Smet, Christopher Chianelli
    • Consulting Discovery Zone - Constraint Optimizer: "I bet you I'm better than a human" by Justin Goldsmith, Christian Witchger
  • Devoxx BE
    Antwerp, Belgium - Mon 12 November 2018
Add event / Archive

KIE projects

  • Drools rule engine
  • OptaPlanner constraint solver
  • jBPM workflow engine

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