Best Practices for Posting Questions

Please read before posting a question:

  • Search the General Discussion community to see if your question has already been answered.
  • Search the H2O User Guide or any of the other documentation resources at
  • Try not to post a duplicate question if possible.
  • For questions that don’t involve code about an H2O product and its software features, such as "where can I find an example of Driverless AI Machine Learning model deployment in Java Runtime or C++ Runtime?, "how can I use GPUs with H2O Driverless AI?",..., please post those questions in the General Discussions community, include the appropriate tags and our H2O developers will respond.
  • For code questions, if you have not read Stackoverflow’s Minimal, Complete and Verifiable Example (MCVE) article, we encourage you to read it, then make your post in the General Discussions community.  Please use the appropriate tag(s) for your question.
  • For bug reports or feature requests, you can file support tickets directly in our issue tracking system located here:  When filing a bug report, please make sure to include a reproducible example if possible and H2O product version & client (R, Python, etc) information.

Provide the following information at the top of your post:

  1. What Product are you using?
    1. Driverless AI, H2O-3, Sparkling Water, Steam, Puddle, H2O4GPU, Deep Water, Q-Core, Q-Apps, Other
  2. What is the version of the Product?
  3. What type of machine are you using? (OS X 10.11.4, Windows 10, etc)
  4. What is your Time Zone?
  5. What is the priority of your question?
    1. Low, Medium, High, Urgent
  6. What type of Question are you asking?
    1. Question, Bug, Feature Request, Improvement
  7. What is your problem description?
    1. For example:
      1. If you ran into an error, what are the steps to reproduce your error? Was there any code you were executing when you received an error message? If you have the error message, can you paste it into your post? Can you share the type of data you were using?