Github user concretevitamin commented on the pull request:
https://github.com/apache/spark/pull/1272#issuecomment-47717333
Yeah, what is motivating this change? When this class got introduced, @rxin
commented that java.util.ConcurrentHashMap had bad memory footprint and
suggested the current approach instead.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
