Hi：
This is a unit test, and I changed to NumericDocValuesField with a similar
error.
I tried testing the NumericDocValuesField, SortedNumericDocValuesField and
SortedSetDocValuesField, these three fields can not be specified in
groupingSearch. Does groupingSearch only support SortedDocValuesField?
Martin Grigorov <mgrigo...@apache.org> 于2019年5月15日周三 下午1:51写道：
> Hi,
>
> On Tue, May 14, 2019 at 8:28 PM 顿顿 <libo...@gmail.com> wrote:
>
> > When I use groupingSearch specified as SortedNumericDocValuesField,
> > I got an "unexpected docvalues type NUMERIC for field 'id'
> > (expected=SORTED)" Exception.
> >
> > My code is as follows:
> > String indexPath = "tmp/grouping";
> > Analyzer standardAnalyzer = new StandardAnalyzer();
> > Directory indexDir = FSDirectory.open(Paths.get(indexPath));
> > IndexWriterConfig indexWriterConfig = new
> > IndexWriterConfig(standardAnalyzer);
> > indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
> > IndexWriter masterIndex = new IndexWriter(indexDir,
> > indexWriterConfig);
> >
> > String name = "Tom";
> > for (int i = 1; i < 5; i++) {
> > Document doc = new Document();
> > doc.add(new StringField("name", name + "_" + i,
> > Field.Store.YES));
> > doc.add(new SortedNumericDocValuesField("id", i));
> > doc.add(new StoredField("id", i));
> >
>
> are you sure both fields should have the same name ("id") ?
>
>
> > masterIndex.addDocument(doc);
> >
> > }
> > masterIndex.commit();
> > masterIndex.commit();
> >
> > IndexReader reader =
> > DirectoryReader.open(FSDirectory.open(Paths.get(indexPath)));
> > IndexSearcher searcher = new IndexSearcher(reader);
> >
> > GroupingSearch groupingSearch = new GroupingSearch("id");
> > TopGroups topGroups = groupingSearch.search(searcher, new
> > MatchAllDocsQuery(), 0, 100);
> >
> > System.out.println(topGroups.totalHitCount);
> > reader.close();
> >
> >
> > The exception is as follows:
> > Exception in thread "main" java.lang.IllegalStateException: unexpected
> > docvalues type SORTED_NUMERIC for field 'id' (expected=SORTED). Re-index
> > with correct docvalues type.
> > at org.apache.lucene.index.DocValues.checkField(DocValues.java:317)
> > at org.apache.lucene.index.DocValues.getSorted(DocValues.java:369)
> > at
> >
> >
> org.apache.lucene.search.grouping.TermGroupSelector.setNextReader(TermGroupSelector.java:56)
> > at
> >
> >
> org.apache.lucene.search.grouping.FirstPassGroupingCollector.doSetNextReader(FirstPassGroupingCollector.java:348)
> > at
> >
> >
> org.apache.lucene.search.SimpleCollector.getLeafCollector(SimpleCollector.java:33)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:643)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:443)
> > at
> >
> >
> org.apache.lucene.search.grouping.GroupingSearch.groupByFieldOrFunction(GroupingSearch.java:141)
> > at
> >
> >
> org.apache.lucene.search.grouping.GroupingSearch.search(GroupingSearch.java:113)
> >
> >
> > The version of Lucene I am using is 8.0.0.
> >
> >
> > Finally, I want to know how groupingSearch specifies three fields:
> > NumericDocValuesField, SortedNumericDocValuesField,
> > SortedSetDocValuesField?
> >
> >
> >
> >
> > Thank you for your attention to this matter！
> >
>
