Looks like this is indeed a bug My colleague debugged this behavior and it turns out that Solr only requests id and score from the shards, and not the user-specified field list. You can see that on this line
https://github.com/apache/lucene-solr/blob/branch_7_4/solr/core/src/java/org/apache/solr/handler/component/MoreLikeThisComponent.java#L342 Happy to create a Jira ticket -Doug On Mon, Sep 3, 2018 at 5:23 AM Charlie Hull <char...@flax.co.uk> wrote: > On 31/08/2018 19:36, Doug Turnbull wrote: > > Hello, > > > > We're working on a Solr More Like This project (Solr 6.6.2), using the > More > > Like This searchComponent. What we note is in standalone Solr, when we > > request MLT using the search component, we get every more like this > > document fully formed with complete fields in the moreLikeThis section. > > Hey Doug, > > IIRC there wasn't a lot of support for MLT in cloud mode a few years > ago, and there are certainly still a few open issues around cloud support: > https://issues.apache.org/jira/browse/SOLR-4414 > https://issues.apache.org/jira/browse/SOLR-5480 > Maybe there are some hints in the ticket comments about different ways > to do what you want. > > Cheers > > Charlie > > > > > In cloud, however, with the exact same query and config, we only get the > > doc ids under "moreLikeThis" requiring us to fetch the metadata > associated > > with each document. > > > > I can't easily share an example due to confidentiality, but I want to > check > > if we're missing something? Documentation doesn't mention any > limitations. > > The only interesting note I've found is this one which points to a > > potential difference in behavior > > > >> The Cloud MLT Query Parser uses the realtime get handler to retrieve > the > > fields to be mined for keywords. Because of the way the realtime get > > handler is implemented, it does not return data for fields populated > using > > copyField. > > > > https://stackoverflow.com/a/46307140/8123 > > > > Any thoughts? > > > > -Doug > > > > > -- > Charlie Hull > Flax - Open Source Enterprise Search > > tel/fax: +44 (0)8700 118334 <+44%20870%20011%208334> > mobile: +44 (0)7767 825828 <+44%207767%20825828> > web: www.flax.co.uk > -- CTO, OpenSource Connections Author, Relevant Search http://o19s.com/doug
