Github user HeartSaVioR commented on the issue:
https://github.com/apache/storm/pull/2319
Before looking into detail, according to design doc, as I commented to the
JIRA issue, I don't see a reason to store cache to disk or so, since ZK is
still a source of truth and whenever process starts it should sync up with ZK
because cache may be outdated. It looks like keeping cache in memory looks
sufficient.---
