wrong calc of numFound in DistributedSearch
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Key: SOLR-1854
URL: https://issues.apache.org/jira/browse/SOLR-1854
Project: Solr
Issue Type: Bug
Components: SearchComponents - other
Affects Versions: 1.4
Reporter: Lutz
When I search two indices with shard param in a distributed search, the
numFound parameter in the result is incorrect when the count of the found rows
in the second index is smaller than the &rows parameter in the query string and
there are many identical hits in both index.
Simple example: use the same index for both shards. try a distributed search
with a query that will find lets say 100 hits in each index. numFound will be
190, if default for rows is 10. It should be 100. If you add &rows=200 to the
query string, numFound is correct.
I think the error is in QueryComponent.mergeIds:
for (int i=0; i<docs.size(); i++) {
SolrDocument doc = docs.get(i);
Object id = doc.getFieldValue(uniqueKeyField.getName());
String prevShard = uniqueDoc.put(id, srsp.getShard());
if (prevShard != null) {
// duplicate detected
numFound--;
because the comparison for identical ids is only done for doc.size() documents.
thanks
lutz
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