Github user merrimanr commented on the issue:
https://github.com/apache/metron/pull/646
The comment "This is needed when configuring MySQL for Metron REST because
this property must be" is actually incorrect now that I go back and look at it.
The schema-mysql.sql was initially incorrect because it was dropping the
tables (MySQL doesn't support "create table if not exists") and recreating them
every time.
Fortunately Spring just ignores any errors thrown when running these
scripts so the drop statements were just removed and creating a table that
already existed is safely ignored. This is just a convenience feature that
keeps people from having to manually create database assets.
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