A common question among HBase contributors, especially hadoop contributors/committers, is related to the 'Submit patch' button. Clicking the button wouldn't trigger build on Jenkins. The setup here is different from that for hadoop.
My understanding is that clicking the button means the author is confident that his/her patch is in a reviewable state. The patches attached to JIRAs before 'Submit patch' button is clicked can be regarded as preview version. Cheers
