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Posted to dev@lucene.apache.org by "Markus Jelsma (JIRA)" <ji...@apache.org> on 2018/04/20 11:05:00 UTC

[jira] [Commented] (SOLR-9104) NPE in CollapsingQParser when two fq={!collapse} and zero results

    [ https://issues.apache.org/jira/browse/SOLR-9104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16445601#comment-16445601 ] 

Markus Jelsma commented on SOLR-9104:
-------------------------------------

Thanks Matthias, it sounds great but we need some committers to chime in regarding side effects. Is there a patch available?

> NPE in CollapsingQParser when two fq={!collapse} and zero results
> -----------------------------------------------------------------
>
>                 Key: SOLR-9104
>                 URL: https://issues.apache.org/jira/browse/SOLR-9104
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 6.0
>            Reporter: Markus Jelsma
>            Priority: Major
>             Fix For: 6.2, 7.0
>
>
> This is a very weird problem that is reproducible on a small production server, but not on the local machine although they run the same 6.0 version., and have an almost identical index. The only minor difference is that production is a SolrCloud with 1 shard and two replica's, just for a bit of redundancy.
> The following query yields zero results and throws the NPE:
> {code}
> select?q=query:seis&fq={!collapse field=query_digest}&fq={!collapse field=result_digest}
> {code}
> The next query does yield results and does not throw anything, it just works as it should work:
> {code}
> select?q=query:seiz&fq={!collapse field=query_digest}&fq={!collapse field=result_digest}
> {code}
> The /select handler used does not add any fancy param other than rows.
> Here's the NPE:
> {code}
> 2016-05-11 14:10:27.666 ERROR (qtp1209271652-3338) [c:suggestions s:shard1 r:core_node1 x:suggestions_shard1_replica1] o.a.s.s.HttpSolrCall null:java.lang.NullPointerException
>         at org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:814)
>         at org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:851)
>         at org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:272)
>         at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1794)
>         at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1611)
>         at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:634)
>         at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:529)
>         at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:287)
>         at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:155)
> {code}
> Edit: for the sake of clarity. It really needs double fq={!collapse bla bla for the NPE to appear. If i remove either of the filters from the query, i get a nice zero resultset back. Both fields are defined as int.



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