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https://issues.apache.org/jira/browse/SOLR-7435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14507766#comment-14507766
]
Joel Bernstein commented on SOLR-7435:
--------------------------------------
Just tested out the following query:
http://localhost:8983/solr/sample/select?q=id:doc*&wt=json&indent=true&fq={!collapse%20field=group_i}&fq={!collapse%20field=group1_i}
On a very small index this worked for me. Then I optimized the index to see if
the issue only occurred on a single segment and it still worked for me.
I haven't done any testing on this scenario before but in theory it should
work. And you should be able to control the order of the collapses with the
cost parameter.
The exception was coming from a collapse on an integer field using the score to
select the group head. So that's what I tested with.
The specific numeric collapse support is new in 5.0 so it would not surprise me
if there were some things that needed to be ironed out.
> NPE in FieldCollapsingQParser
> -----------------------------
>
> Key: SOLR-7435
> URL: https://issues.apache.org/jira/browse/SOLR-7435
> Project: Solr
> Issue Type: Bug
> Affects Versions: 5.1
> Reporter: Markus Jelsma
> Priority: Minor
> Fix For: 5.2
>
>
> Not even sure it would work anyway, i tried to collapse on two distinct
> fields, ending up with this:
> select?q=*:*&fq={!collapse field=qst}&fq={!collapse field=rdst}
> {code}
> 584550 [qtp1121454968-20] ERROR org.apache.solr.servlet.SolrDispatchFilter [
> suggests] – null:java.lang.NullPointerException
> at
> org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:743)
> at
> org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:780)
> at
> org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:203)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1660)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1479)
> at
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:556)
> at
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:518)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:222)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:1984)
> at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:829)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:446)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:220)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> at org.eclipse.jetty.server.Server.handle(Server.java:368)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
> at
> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
> at
> org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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