[VuFind-Tech] SOLR built in deduplication

[Markus F. <in...@fl...>]

I am struggeling with configuring automatic deduplication in Vufind. I 
tried to follow:

http://wiki.apache.org/solr/Deduplication

Actually nothing happens. All records are being imported without any 
deduplication.

What am I missing?

Thanks
Markus

---
In /usr/local/vufind/solr/biblio/conf/solrconfig.xml I added

<requestHandler name="/update" class="solr.XmlUpdateRequestHandler" >
  <lst name="defaults">
      <str name="update.processor">dedupe</str>
  </lst>
</requestHandler>

<updateRequestProcessorChain name="dedupe">
   <processor 
class="org.apache.solr.update.processor.SignatureUpdateProcessorFactory">
   <bool name="enabled">true</bool>
   <bool name="overwriteDupes">true</bool>
   <str name="signatureField">dedupeHash</str>
   <str name="fields">reference,issn</str>
   <str 
name="signatureClass">org.apache.solr.update.processor.Lookup3Signature</str>
   </processor>
   <processor class="solr.LogUpdateProcessorFactory" />
   <processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>

<!-- The field "reference" corresponds to MARC 773g, is mapped in 
marc.poperties and has also an additional entry in schema.xml -->

---
In /usr/local/vufind/solr/biblio/conf/schema.xml I added the field

<field name="dedupeHash" type="string" stored="true" indexed="true" 
multiValued="false" />