Github user ottobackwards commented on the issue:
https://github.com/apache/metron/pull/530
OK @merrimanr , @mmiklavc
I have resolved the issues for working with grok from the rest/ui.
[PR INTO 777 for fixing
GROK](https://github.com/ottobackwards/metron/pull/6)
Please review so we can get this into 777.
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