Github user maedhroz commented on a diff in the pull request: https://github.com/apache/lucene-solr/pull/47#discussion_r69510618 --- Diff: solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java --- @@ -766,16 +766,29 @@ public Document doc(int i, Set<String> fields) throws IOException { } final DirectoryReader reader = getIndexReader(); - if (!enableLazyFieldLoading || fields == null) { - d = reader.document(i); + boolean containsAllFields = true; + + if (fields != null) { + if (enableLazyFieldLoading) { + final SetNonLazyFieldSelector visitor = new SetNonLazyFieldSelector(fields, reader, i); + reader.document(i, visitor); + d = visitor.doc; + } else { + d = reader.document(i, fields); + containsAllFields = false; + } } else { - final SetNonLazyFieldSelector visitor = new SetNonLazyFieldSelector(fields, reader, i); - reader.document(i, visitor); - d = visitor.doc; + d = reader.document(i); } if (documentCache != null) { - documentCache.put(i, d); + // Only cache the already retrieved document if it is complete... + if (containsAllFields) { + documentCache.put(i, d); + } else { + // ...and retrieve a complete document for caching otherwise. + documentCache.put(i, reader.document(i)); + } --- End diff -- @shalinmangar I've made a pass at restoring the previous caching behavior (with some comments around the rationale). It feels like we might have a complete solution at this point.
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