SolrCloud - ResultContext versus SolrDocumentList in distributed mode

[Elodie Sannier <el...@kelkoo.fr>]

Hello,

I am using SolrCloud 4.5.1 with one shard and three replicas and I am
using the distributed mode.

I am using a custom SearchHandler which makes two sub-queries and merges
the responses.
When I merge the SolrQueryResponse objects I do the following casting :
SolrDocumentList firstResponseSDL = (SolrDocumentList)
firstResponse.getValues().get(Constants.RESPONSE);
SolrDocumentList secondResponseSDL = (SolrDocumentList)
secondResponse.getValues().get(Constants.RESPONSE);

Sometimes (not often), I have a ClassCastException only for the casting
of the second response:
java.lang.ClassCastException: org.apache.solr.response.ResultContext
cannot be cast to org.apache.solr.common.SolrDocumentList

Correct me if I am wrong, but I thought the response type was always
SolrDocumentList in a distibuted mode and ResultContext in a NOT
distibuted mode.

In which case, in a distributed mode, the response of the first
sub-query can be an instance of SolrDocumentList and the second
sub-query an instance of ResultContext ?

Elodie Sannier

Kelkoo SAS
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