Steps to reproduce:

• build a content Query
• [optional] use the query with ContentSearchAdapter for Pagerfanta
• add filter of \Ibexa\Contracts\Core\Repository\Values\Content\Query\Criterion\ContentId type and pass empty array as an constructor argument
• try to execute query by calling findContent method of SearchService

Result:

An unhandled, raw HttpClient exception is thrown and propagated to the top of execution stack:

ClientException                    
HTTP/1.1 404 Not Found returned for "http://127.0.0.1:30001/solr/solr/collection1/select". 

Expected result:

An empty list of results is returned.