Thank you Diego! This works with some small changes. My feature ended up
looking like this:

{
  "name" : "FeatureA",
  "store" : "commonFeatureStore",
  "class" : "org.apache.solr.ltr.feature.SolrFeature",
  "params" : {
    "q" : "{!func}if(gt(ms(CutoffDate,NOW),0),exists(query({!v=
PreZones:${zone}})),exists(query({!v=PostZones:${zone}})))"
  }
},

On Tue, Aug 29, 2017 at 12:32 PM, Diego Ceccarelli <
[EMAIL PROTECTED]> wrote:
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB