Chutney is one of those things that I have always thought to be "way out there" and beyond me. Last night, I saw either Tyler or guy, forgot which one, make chutney. It seemed doable.
A quick search
syas that there are a lot of chutney recipies out there. There are some opinions on how long it keeps. This should be helpful on sterilization.
My somewhat educated guess, and in my own opinion, (have I covered myself well enough), Chutneys seem to fall in the jelly / jam class. If prepared properly and canned properly, they should last a long time. In the second aticle that i linked, they were comfortable with over a year.
Hope this helps.