Github user nickwallen commented on the issue: https://github.com/apache/incubator-metron/pull/521 I think the ACL issue was because there was a loop iterating over the topics setting the ACLs. The 'yaf' topic was not in that loop so the ACL was never set. I changed it so none of the validation suggests using 'yaf' since we don't set the ACLs and don't start the parser topology.
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