The suggestions from Chris and Erick are probably an answer, but I just wanted to say that you also looking at this as too much of a black-box situation.
You are trying to troubleshoot an effect of something specified on the client from the search results. You can bisect this problem and look at the way the records actually got indexed. So, if the record had "id" set to "" in the client, what do you get in the index for that field? If that behavior is inconsistent with what you do when you don't set the "id" at all, concentrate on fixing that. Most likely using Chris' approach. Regards, Alex. ---- Newsletter and resources for Solr beginners and intermediates: http://www.solr-start.com/ On 15 April 2016 at 09:20, Susmit Shukla <shukla.sus...@gmail.com> wrote: > Hi Chris/Erick, > > Does not work in the sense the order of documents does not change on > changing sort from asc to desc. > This could be just a trivial bug where UUID processor factory is generating > uuid even if it is empty. > This is on solr 5.3.0 > > Thanks, > Susmit > > > > > > On Thu, Apr 14, 2016 at 2:30 PM, Chris Hostetter <hossman_luc...@fucit.org> > wrote: > >> >> I'm also confused by what exactly you mean by "doesn't work" but a general >> suggestion you can try is putting the >> RemoveBlankFieldUpdateProcessorFactory before your UUID Processor... >> >> >> https://lucene.apache.org/solr/6_0_0/solr-core/org/apache/solr/update/processor/RemoveBlankFieldUpdateProcessorFactory.html >> >> If you are also worried about strings that aren't exactly empty, but >> consist only of whitespace, you can put TrimFieldUpdateProcessorFactory >> before RemoveBlankFieldUpdateProcessorFactory ... >> >> >> https://lucene.apache.org/solr/6_0_0/solr-core/org/apache/solr/update/processor/TrimFieldUpdateProcessorFactory.html >> >> >> : Date: Thu, 14 Apr 2016 12:30:24 -0700 >> : From: Erick Erickson <erickerick...@gmail.com> >> : Reply-To: solr-user@lucene.apache.org >> : To: solr-user <solr-user@lucene.apache.org> >> : Subject: Re: UUID processor handling of empty string >> : >> : What do you mean "doesn't work"? An empty string is >> : different than not being present. Thee UUID update >> : processor (I'm pretty sure) only adds a field if it >> : is _absent_. Specifying it as an empty string >> : fails that test so no value is added. >> : >> : At that point, if this uuid field is also the <unkqueKey>, >> : then each doc that comes in with an empty field will replace >> : the others. >> : >> : If it's _not_ the <unkqueKey>, the sorting will be confusing. >> : All the empty string fields are equal, so the tiebreaker is >> : the internal Lucene doc ID, which may change as merges >> : happen. You can specify secondary sort fields to make the >> : sort predictable (the <unkqueKey> field is popular for this). >> : >> : Best, >> : Erick >> : >> : On Thu, Apr 14, 2016 at 12:18 PM, Susmit Shukla <shukla.sus...@gmail.com> >> wrote: >> : > Hi, >> : > >> : > I have configured solr schema to generate unique id for a collection >> using >> : > UUIDUpdateProcessorFactory >> : > >> : > I am seeing a peculiar behavior - if the unique 'id' field is >> explicitly >> : > set as empty string in the SolrInputDocument, the document gets indexed >> : > with UUID update processor generating the id. >> : > However, sorting does not work if uuid was generated in this way. Also >> : > cursor functionality that depends on unique id sort also does not work. >> : > I guess the correct behavior would be to fail the indexing if user >> provides >> : > an empty string for a uuid field. >> : > >> : > The issues do not happen if I omit the id field from the >> SolrInputDocument . >> : > >> : > SolrInputDocument >> : > >> : > solrDoc.addField("id", ""); >> : > >> : > ... >> : > >> : > I am using schema similar to below- >> : > >> : > <!--schema.xml--> >> : > >> : > <fieldType name="uuid" class="solr.UUIDField" indexed="true" /> >> : > >> : > <field name="id" type="uuid" indexed="true" stored="true" >> required="true" /> >> : > >> : > <uniqueKey>id</uniqueKey> >> : > >> : > <!--solrconfig.xml--> >> : > <updateRequestProcessorChain name="uuid"> >> : > <processor class="solr.UUIDUpdateProcessorFactory"> >> : > <str name="fieldName">id</str> >> : > </processor> >> : > <processor class="solr.RunUpdateProcessorFactory" /> >> : > </updateRequestProcessorChain> >> : > >> : > >> : > <requestHandler name="/update" class="solr.UpdateRequestHandler"> >> : > <lst name="defaults"> >> : > <str name="update.chain">uuid</str> >> : > </lst> >> : > </requestHandler> >> : > >> : > >> : > Thanks, >> : > Susmit >> : >> >> -Hoss >> http://www.lucidworks.com/ >>
