A multiValued <uniqueKey> really doesn't make any sense. But your log file should have something in it like this: SEVERE: uniqueKey should not be multivalued although it _is_ a bit hard to see on startup unless you've suppressed the INFO level output.
See: https://issues.apache.org/jira/browse/SOLR-1570 Best Erick On Tue, Jul 17, 2012 at 9:24 AM, Bill Havanki <havank...@gmail.com> wrote: > I had the same problem as the original poster did two years ago (!), but > with Solr 3.4.0: > >> I cannot get hits back and do not get a correct total number of records > when using shard searching. > > When performing a sharded query, I would get empty / missing results - no > documents at all. Querying each shard individually worked, but anything > with the "shards" parameter yielded no result documents. > > I was able to get results back by updating my schema to include > multiValued="false" for the unique key field. > > The problem I was seeing was that, when Solr was formulating the queries to > go get records from each shard, it was including square brackets around the > ids it was asking for, e.g.: > > ...q=123&ids=[ID1],[ID2],[ID3]&... > > I delved into the Solr code and saw that this query string was being formed > (in QueryComponent.createRetrieveDocs()) by simply calling toString() on > the unique key field value for each document it wanted to get. My guess is > that the value objects somehow were ArrayLists (or something like that) and > not Strings, so those annoying square brackets showed up via toString(). By > emphasizing in the schema that the field was single-valued, those lists > would hopefully stop appearing, and I think they did. At least the brackets > went away. > > Here's the relevant QueryComponent code (again, 3.4.0 - it's the same in > 3.6.0, didn't check 4): > > ArrayList<String> ids = new ArrayList<String>(shardDocs.size()); > for (ShardDoc shardDoc : shardDocs) { > // TODO: depending on the type, we may need more tha a simple toString()? > ids.add(shardDoc.id.toString()); > } > sreq.params.add(ShardParams.IDS, StrUtils.join(ids, ',')); > > The comment in there seems to fit my theory. :) > > Bill
