Hi All, I'm seeing some odd behavior that I'm hoping someone might have encountered before. We're using Solr 6.6.6 and very infrequently (happened twice in the past year) we're getting 0 hits returned for a query that I know should have results. We've hit this issue once over the past year in 2 separate collections (both with a single shard), each with several million documents, where a query will return 0 hits. I see a similar query run 5-10s later and it will get the expected # of hits (~1M hits) so I know that we haven't reindexed a million docs between the two queries. Besides that I can see that between the 2 queries we only added 150-200 docs with a single commit so I don't see how that could affect the results in this manner.
We have a moderate indexing load during the time we see this, we seen much higher indexing loads without issue but it's also not idle either. I've spent a bunch of time trying to reproduce this, tinkering with queries because I assumed that the problem had to be with the search query and not with Solr. Search times for both queries (those with 0 hits and those with 10k+ hits) are taking 30-40ms. Anyone run into something like this? Any ideas on something to look for? Thanks, Brian Lininger
