Java 9 Modules. Why not OSGi?

Modules will inevitably appear in Java 9. Some people are little worried about it, some are scared, and some genuinely perplexed: why do we need them, if we have OSGi for more than 15 years that solves exactly the same problems as Java 9 modules?

In this talk we will attempt to understand what problems OSGi tries to solve, how does it solve them and does it at all. Then we will understand what problems Jigsaw does not solve that OSGi tries to, and why, and what problems are solved by Jigsaw and how. Finally, we will talk about what problems Jigsaw brings to the Java ecosystem and how do we have to deal with them.;