I have a prototype SolrCloud 4.10.2 setup with 13 collections (of 1 replica, 1 shard each) and a separate 1-node Zookeeper 3.4.6. The very first app test case I wrote is failing intermittently in this environment, when I only have 4 documents ingested into the cloud. I dug in and found when I query against multiple collections, using the "collection=" parameter, the aggregates I request are correct about 50% of the time. The other 50% of the time, the aggregate returned by Solr is not correct. Note this is for the identical query. In other words, I can run the same query multiple times in a row, and get different answers.
The simplest version of the query that still exhibits the odd behavior is as follows: http://192.168.59.103:8985/solr/query_handler/query?facet.range=eventDate&f.eventDate.facet.range.end=2014-12-31T23:59:59.999Z&f.eventDate.facet.range.gap=%2B1DAY&fl=eventDate,id&start=0&collection=2014_04,2014_03&rows=10&f.eventDate.facet.range.start=2014-01-01T00:00:00.000Z&q=*:*&f.eventDate.facet.mincount=1&facet=true When it SUCCEEDS, the aggregate correctly appears like this: "facet_counts":{ "facet_queries":{}, "facet_fields":{}, "facet_dates":{}, "facet_ranges":{ "eventDate":{ "counts":[ "2014-04-01T00:00:00Z",3], "gap":"+1DAY", "start":"2014-01-01T00:00:00Z", "end":"2015-01-01T00:00:00Z"}}, "facet_intervals":{}}} When it FAILS, note that the counts[] array is empty: "facet_counts":{ "facet_queries":{}, "facet_fields":{}, "facet_dates":{}, "facet_ranges":{ "eventDate":{ "counts":[], "gap":"+1DAY", "start":"2014-01-01T00:00:00Z", "end":"2015-01-01T00:00:00Z"}}, "facet_intervals":{}}} If I further simplify the query, by removing range options or reducing to one (1) collection name, then the problem goes away. The solr logs are clean at INFO level, and there is no substantive difference in log output when the query succeeds vs fails, leaving me stumped where to look next. Suggestions welcome. Regards, David
