Thank you for writing this up @Jonas Straub and thanks for the extra details @Michael Young. In case it helps anyone else, here is the entire "add-unknown-fields-to-the-schema" section. Not only did I have to apply the classes as @Michael Young has pointed out, but I also had to ensure that both these new processors were added at the top of the updateRequestProcessorChain. This was using a stand-alone SolrCloud instance that was installed as part of Ambari 2.2.2 with HDP 2.4.2. For that install, I found that I had to re-run the install SolrCloud install steps per the HDP Ranger Audits to SolrCloud documentation, consisting of: Running add_ranger_audits_conf_to_zk.sh Starting solr (start_solr.sh) Running create_ranger_audits_collection.sh <updateRequestProcessorChain name="add-unknown-fields-to-the-schema">
<processor class="solr.DefaultValueUpdateProcessorFactory">
<str name="fieldName">_ttl_</str>
<str name="value">+14DAYS</str>
</processor>
<processor class="solr.processor.DocExpirationUpdateProcessorFactory">
<int name="autoDeletePeriodSeconds">300</int>
<str name="ttlFieldName">_ttl_</str>
<str name="expirationFieldName">expire_at</str>
</processor>
<processor class="solr.RemoveBlankFieldUpdateProcessorFactory"/>
<processor class="solr.ParseBooleanFieldUpdateProcessorFactory"/>
<processor class="solr.ParseLongFieldUpdateProcessorFactory"/>
<processor class="solr.ParseDoubleFieldUpdateProcessorFactory"/>
<processor class="solr.ParseDateFieldUpdateProcessorFactory">
<arr name="format">
<str>yyyy-MM-dd'T'HH:mm:ss.SSSZ</str>
<str>yyyy-MM-dd'T'HH:mm:ss,SSSZ</str>
<str>yyyy-MM-dd'T'HH:mm:ss.SSS</str>
<str>yyyy-MM-dd'T'HH:mm:ss,SSS</str>
<str>yyyy-MM-dd'T'HH:mm:ssZ</str>
<str>yyyy-MM-dd'T'HH:mm:ss</str>
<str>yyyy-MM-dd'T'HH:mmZ</str>
<str>yyyy-MM-dd'T'HH:mm</str>
<str>yyyy-MM-dd HH:mm:ss.SSSZ</str>
<str>yyyy-MM-dd HH:mm:ss,SSSZ</str>
<str>yyyy-MM-dd HH:mm:ss.SSS</str>
<str>yyyy-MM-dd HH:mm:ss,SSS</str>
<str>yyyy-MM-dd HH:mm:ssZ</str>
<str>yyyy-MM-dd HH:mm:ss</str>
<str>yyyy-MM-dd HH:mmZ</str>
<str>yyyy-MM-dd HH:mm</str>
<str>yyyy-MM-dd</str>
</arr>
</processor>
<processor class="solr.AddSchemaFieldsUpdateProcessorFactory">
<str name="defaultFieldType">text_general</str>
<lst name="typeMapping">
<str name="valueClass">java.lang.Boolean</str>
<str name="fieldType">booleans</str>
</lst>
<lst name="typeMapping">
<str name="valueClass">java.util.Date</str>
<str name="fieldType">tdates</str>
</lst>
<lst name="typeMapping">
<str name="valueClass">java.lang.Long</str>
<str name="valueClass">java.lang.Integer</str>
<str name="fieldType">tlongs</str>
</lst>
<lst name="typeMapping">
<str name="valueClass">java.lang.Number</str>
<str name="fieldType">tdoubles</str>
</lst>
</processor>
<processor class="solr.LogUpdateProcessorFactory"/>
<processor class="solr.RunUpdateProcessorFactory"/>
</updateRequestProcessorChain>
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