[SOLR-3150] NPE when facetting using facet.prefix on an "empty" field

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0-ALPHA
• Fix Version/s: 4.0-ALPHA
• Assignee: Yonik Seeley
• Reporter: Pablo Queixalos
• Created: 21/Feb/12 17:24
• Updated: 10/May/13 10:40
• Resolved: 21/Feb/12 20:53

Description

FacetComponent works fine on empty fields but crashes if facet.prefix parameter is set.

Looking at the code : getOrdTermsEnum(..) returns null if no value is found on the field but getCounts(...) does not checks if TermsEnum te is null or not.

UnInvertedField.java (getCounts(..))

      TermsEnum te = getOrdTermsEnum(searcher.getAtomicReader());
      if (prefix != null && prefix.length() > 0) {
        final BytesRef prefixBr = new BytesRef(prefix);
232:    if (te.seekCeil(prefixBr, true) == TermsEnum.SeekStatus.END) {
          startTerm = numTermsInField;
        } else {
          startTerm = (int) te.ord();
        }
        prefixBr.append(UnicodeUtil.BIG_TERM);
        if (te.seekCeil(prefixBr, true) == TermsEnum.SeekStatus.END) {
          endTerm = numTermsInField;
        } else {
          endTerm = (int) te.ord();
        }
      }

java.lang.NullPointerException
	at org.apache.solr.request.UnInvertedField.getCounts(UnInvertedField.java:232)
	at org.apache.solr.request.SimpleFacets.getTermCounts(SimpleFacets.java:299)
	at org.apache.solr.request.SimpleFacets.getFacetFieldCounts(SimpleFacets.java:354)
	at org.apache.solr.request.SimpleFacets.getFacetCounts(SimpleFacets.java:207)
	at org.apache.solr.handler.component.FacetComponent.process(FacetComponent.java:81)

Issue Links

• is broken by: LUCENE-3003 Move UnInvertedField into Lucene core