Github user srdo commented on the issue:
https://github.com/apache/storm/pull/2800
@danny0405 That doesn't sound safe to me. I think you're right that it
works fine most of the time, but if there are key collisions or an insert leads
the map to get resized, I would think that two threads modifying the map at the
same time could interfere with each other.
Either way, if you're okay with making the whole function thread safe, I
think we should do it.---
