<p>Questions about how Apache Spark Mllib works, what code / functions / packages to use, error messages, etc. would almost certainly be off topic here. Questions about how cross validation, logistic regression, etc. would almost certainly be on topic here. It depends on what you want to know. Note that the former might be on topic on <a href="https://stackoverflow.com/">Stack Overflow</a> if they are coding questions &amp; include a <a href="https://stackoverflow.com/help/mcve">reproducible example</a> for people to work with.</p>
