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

["Markus Jelsma (JIRA)" <ji...@apache.org>]

Markus Jelsma created SOLR-9104:
-----------------------------------

             Summary: 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
             Fix For: 6.1, master (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 then 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 and 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}



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