Error "unexpected docvalues type NUMERIC for field" using rord() function query on single valued int field

[Jaco de Vroed]

Hello Solr users,

I’m running into an error situation using Solr 5.3.3. The case is as follows. 
In my schema, I have a field with a definition like this:

        <fieldType name="int" class="solr.TrieIntField" precisionStep="0" 
positionIncrementGap="0”/>
        ….
        <field name="PublicationDate" type="int" indexed="true" stored="true" 
docValues="true" />

That field is used in function queries for boosting purposes, using the rord() 
function. We’re coming from Solr 4, not using docValues for that field, and now 
moving to Solr 5, using docValues. Now, this is causing a problem. When doing 
this:

        
http://localhost:8983/solr/core1/select?q=*:*&fl=ID,recip(rord(PublicationDate),0.15,300,10)
 
<http://localhost:8983/solr/core1/select?q=*:*&fl=ID,recip(rord(PublicationDate),0.15,300,10)>

The following error is given: "unexpected docvalues type NUMERIC for field 
'PublicationDate' (expected one of [SORTED, SORTED_SET]). Use UninvertingReader 
or index with docvalues” (full stack trace below).

This does not happen when the field is changed to be multiValued, but I don’t 
want to change that at this point (and I noticed that changing from single 
valued to multivalued, then attempting to post the document again also results 
in an error related to docvalues type, but that could be the topic of another 
mail I guess). This is now blocking our long desired upgrade to Solr 5. We 
initially tried upgrading without docValues, but performance was completely 
killed because of our function query based ranking stuff, so we decide to use 
docValues.

To me, this seems a bug. I’ve tried finding something in Solr’s JIRA, the exact 
same error is in https://issues.apache.org/jira/browse/SOLR-7495 
<https://issues.apache.org/jira/browse/SOLR-7495>, but that is a different case.

I can create a JIRA issue for this of course, but first wanted to throw this at 
the mailing list to see if there’s any insights that can be shared.

Thanks a lot in advance, bye, 

Jaco..

unexpected docvalues type NUMERIC for field 'PublicationDate' (expected one of 
[SORTED, SORTED_SET]). Use UninvertingReader or index with docvalues.
java.lang.IllegalStateException: unexpected docvalues type NUMERIC for field 
'PublicationDate' (expected one of [SORTED, SORTED_SET]). Use UninvertingReader 
or index with docvalues.
        at org.apache.lucene.index.DocValues.checkField(DocValues.java:208)
        at org.apache.lucene.index.DocValues.getSortedSet(DocValues.java:306)
        at 
org.apache.solr.search.function.ReverseOrdFieldSource.getValues(ReverseOrdFieldSource.java:98)
        at 
org.apache.lucene.queries.function.valuesource.ReciprocalFloatFunction.getValues(ReciprocalFloatFunction.java:64)
        at 
org.apache.solr.response.transform.ValueSourceAugmenter.transform(ValueSourceAugmenter.java:95)
        at org.apache.solr.response.DocsStreamer.next(DocsStreamer.java:160)
        at 
org.apache.solr.response.TextResponseWriter.writeDocuments(TextResponseWriter.java:246)
        at 
org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:151)
        at org.apache.solr.response.XMLWriter.writeResponse(XMLWriter.java:113)
        at 
org.apache.solr.response.XMLResponseWriter.write(XMLResponseWriter.java:39)
        at 
org.apache.solr.response.QueryResponseWriterUtil.writeQueryResponse(QueryResponseWriterUtil.java:52)
        at 
org.apache.solr.servlet.HttpSolrCall.writeResponse(HttpSolrCall.java:728)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:469)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:257)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:208)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:499)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at 
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)