Github user justinleet commented on the issue:
https://github.com/apache/metron/pull/1010
@merrimanr After thinking about this a bit, is that actually a serious
problem? This setting is likely to only be done on initial install (e.g. when
selecting Solr or ES). Switching midlife is unlikely to be a problem for the
vast majority of users. Most users should never see the problem of it being
switched because they'd never see `source:type` instead of `source.type` or
vice versa, because you'd have to reindex all your old data into the new format
anyway. We'd need to improve documentation in the Solr feature branch to
ensure that users initially set it up appropriately.
Another way of going about this might be to have the app itself get config
updates on the fly similar to how our topologies do, given that this particular
one is from ZK. At that point, you could do the mapping from old source type
to new source type and update the storage appropriately. I'm sure there's way
more to it than just doing that though (when do you update UI for users, what
are the potential snags in updating that when users are querying, etc.).
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