Github user ottobackwards commented on the issue: https://github.com/apache/metron/pull/1207 We have an overall deficiency here I believe. The Slot management is a oft forgotten and manual task, for adding new parsers from the ui etc, you ( I believe ) still have to remember to have already added a slot before starting your parser topology for example. We may want to consider an overall underlying approach to this that is usable where we fall short.
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