magibney commented on a change in pull request #592:
URL: https://github.com/apache/solr/pull/592#discussion_r799880606
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File path: solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java
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@@ -866,8 +876,48 @@ public BitDocSet getLiveDocSet() throws IOException {
// but the addition of setLiveDocs means we needed to add volatile to
"liveDocs".
BitDocSet docs = liveDocs;
if (docs == null) {
- //note: maybe should instead calc manually by segment, using
FixedBitSet.copyOf(segLiveDocs); avoid filter cache?
- liveDocs = docs = getDocSetBits(matchAllDocsQuery);
+ switch (leafContexts.size()) {
+ case 0:
+ assert numDocs() == 0;
+ docs = new BitDocSet(BitDocSet.empty().getFixedBitSet(), 0);
+ break;
+ case 1:
+ final Bits onlySegLiveDocs =
leafContexts.get(0).reader().getLiveDocs();
+ final FixedBitSet fbs;
+ if (onlySegLiveDocs == null) {
+ final int onlySegMaxDoc = maxDoc();
+ fbs = new FixedBitSet(onlySegMaxDoc);
+ fbs.set(0, onlySegMaxDoc);
+ } else {
+ fbs = FixedBitSet.copyOf(onlySegLiveDocs);
+ }
+ assert fbs.cardinality() == numDocs();
+ docs = new BitDocSet(fbs, numDocs());
+ break;
+ default:
+ final FixedBitSet bs = new FixedBitSet(maxDoc());
+ for (LeafReaderContext ctx : leafContexts) {
+ final LeafReader r = ctx.reader();
+ final Bits segLiveDocs = r.getLiveDocs();
+ final int segDocBase = ctx.docBase;
+ int segOrd = r.maxDoc() - 1;
+ if (segLiveDocs == null) {
+ do {
+ bs.set(segDocBase + segOrd);
Review comment:
:+1: ha! yeah, not sure why it occurred to me above, but not here.
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