[jira] [Created] (SOLR-13944) CollapsingQParserPlugin throws NPE instead of bad request

["Stefan (Jira)" <ji...@apache.org>]

Stefan created SOLR-13944:
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             Summary: CollapsingQParserPlugin throws NPE instead of bad request
                 Key: SOLR-13944
                 URL: https://issues.apache.org/jira/browse/SOLR-13944
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 7.3.1
            Reporter: Stefan


 I noticed the following NPE:
{code:java}
java.lang.NullPointerException at org.apache.solr.search.CollapsingQParserPlugin$OrdFieldValueCollector.finish(CollapsingQParserPlugin.java:1021) at org.apache.solr.search.CollapsingQParserPlugin$OrdFieldValueCollector.finish(CollapsingQParserPlugin.java:1081) at org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:230) at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1602) at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1419) at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:584)
{code}
If I am correct, the problem was already addressed in SOLR-8807. The fix does was not working in this case though, because of a syntax error in the query (I used the local parameter syntax twice instead of combining it). The relevant part of the query is:
{code:java}
&fq={!tag=collapser}{!collapse field=productId sort='merchantOrder asc, price asc, id asc'}
{code}
After discussing that on the mailing list, I was asked to open a ticket, because this situation should result in a bad request instead of a NullpointerException (see [https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201911.mbox/%3CCAMJgJxTuSb%3D8szO8bvHiAafJOs08O_NMB4pcaHOXME4Jj-GO2A%40mail.gmail.com%3E])



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