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https://issues.apache.org/jira/browse/SOLR-4414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13869568#comment-13869568
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Steve Molloy commented on SOLR-4414:
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There was confusion around MLT component and MLT handler support for
distribution. The component already supported it when used in standard search,
the handler didn't. If you feel both tickets should be merged, I'm ok with it.
> MoreLikeThis on a shard finds no interesting terms if the document queried is
> not in that shard
> -----------------------------------------------------------------------------------------------
>
> Key: SOLR-4414
> URL: https://issues.apache.org/jira/browse/SOLR-4414
> Project: Solr
> Issue Type: Bug
> Components: MoreLikeThis, SolrCloud
> Affects Versions: 4.1
> Reporter: Colin Bartolome
>
> Running a MoreLikeThis query in a cloud works only when the document being
> queried exists in whatever shard serves the request. If the document is not
> present in the shard, no "interesting terms" are found and, consequently, no
> matches are found.
> h5. Steps to reproduce
> * Edit example/solr/collection1/conf/solrconfig.xml and add this line, with
> the rest of the request handlers:
> {code:xml}
> <requestHandler name="/mlt" class="solr.MoreLikeThisHandler" />
> {code}
> * Follow the [simplest SolrCloud
> example|http://wiki.apache.org/solr/SolrCloud#Example_A:_Simple_two_shard_cluster]
> to get two shards running.
> * Hit this URL:
> [http://localhost:8983/solr/collection1/mlt?mlt.fl=includes&q=id:3007WFP&mlt.match.include=false&mlt.interestingTerms=list&mlt.mindf=1&mlt.mintf=1]
> * Compare that output to that of this URL:
> [http://localhost:7574/solr/collection1/mlt?mlt.fl=includes&q=id:3007WFP&mlt.match.include=false&mlt.interestingTerms=list&mlt.mindf=1&mlt.mintf=1]
> The former URL will return a result and list some interesting terms. The
> latter URL will return no results and list no interesting terms. It will also
> show this odd XML element:
> {code:xml}
> <null name="response"/>
> {code}
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