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From "Sean Xie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-7883) MoreLikeThis is incompatible with facets
Date Tue, 28 Jun 2016 18:16:57 GMT

    [ https://issues.apache.org/jira/browse/SOLR-7883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15353474#comment-15353474
] 

Sean Xie commented on SOLR-7883:
--------------------------------

[~nuddlegg] 's case is exactly what I have experienced. For the needs we won't be able to
use mlt as a search component nor as a MLT query parser. Having looking into the MLT source
code and what we have done for a hack is to implement a second search using the interesting
terms (same default max terms and adjustable).

> MoreLikeThis is incompatible with facets
> ----------------------------------------
>
>                 Key: SOLR-7883
>                 URL: https://issues.apache.org/jira/browse/SOLR-7883
>             Project: Solr
>          Issue Type: Bug
>          Components: faceting, MoreLikeThis
>    Affects Versions: 5.2.1
>         Environment: Arch Linux / OpenJDK 7.u85_2.6.1-1
>            Reporter: Thomas Seidl
>            Assignee: Shalin Shekhar Mangar
>
> When using the {{MoreLikeThis}} request handler, it doesn't seem possible to also have
facets. This worked in Solr 4, but seems to be broken now.
> Example:
> This works: {{?qt=mlt&q=id:item1&mlt.fl=content}}
> This doesn't: {{?qt=mlt&q=id:item1&mlt.fl=content&facet=true}}
> (Yes, you don't even need to specify any facet fields/ranges/queries. The {{q}} query
just has to match an item.)
> While the latter will actually return the same result set as the former, the HTTP status
is 500 and the following error included in the response:
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.solr.request.SimpleFacets.getHeatmapCounts(SimpleFacets.java:1753)
> 	at org.apache.solr.request.SimpleFacets.getFacetCounts(SimpleFacets.java:289)
> 	at org.apache.solr.handler.MoreLikeThisHandler.handleRequestBody(MoreLikeThisHandler.java:233)
> 	at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
> 	at org.apache.solr.core.SolrCore.execute(SolrCore.java:2064)
> 	at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:654)
> 	at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:450)
> 	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227)
> 	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196)
> 	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:497)
> 	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)
> {noformat}



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