Github user HeartSaVioR commented on the issue:
https://github.com/apache/storm/pull/2203
I'm +1 to restrict names to avoid replacing. One thing to consider is that
when's what we call `later`, and personally I think major version is the safest
version to do the change like this, so 2.0.0 looks like good milestone to
address.
Could we poll how many users are using underscore in one of (component
name, stream name, topology name - also hostname?) to user groups, dev groups
and Twitter official account, and apply smooth migration to only 1.x version if
affected groups are small enough?
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