I was seeing something like this, and it turned out to be a problem with our autoCommit and autoSoftCommit settings. We had overly aggressive settings that eventually started failing with errors around too many warming searchers etc...
You can test this by doing a commit and seeing if the replicas start returning consistent results On Thu, Jan 5, 2017 at 10:31 AM, Charlie Hull <char...@flax.co.uk> wrote: > On 05/01/2017 13:30, Morten Bøgeskov wrote: > >> >> >> Hi. >> >> We've got a SolrCloud which is sharded and has a replication factor of >> 2. >> >> The 2 replicas of a shard may look like this: >> >> Num Docs: 5401023 >> Max Doc: 6388614 >> Deleted Docs: 987591 >> >> >> Num Docs: 5401023 >> Max Doc: 5948122 >> Deleted Docs: 547099 >> >> We've seen >10% difference in Max Doc at times with same Num Docs. >> Our use case is few documents that are search and many small that >> are filtered against (often updated multiple times a day), so the >> difference in deleted docs aren't surprising. >> >> This results in a different score for a document depending on which >> replica it comes from. As I see it: it has to do with the different >> maxDoc value when calculating idf. >> >> This in turn alters a specific document's position in the search >> result over reloads. This is quite confusing (duplicates in pagination). >> >> What is the trick to get homogeneous score from different replicas. >> We've tried using ExactStatsCache & ExactSharedStatsCache, but that >> didn't seem to make any difference. >> >> Any hints to this will be greatly appreciated. >> >> > This was one of things we looked at during our recent Lucene London > Hackday (see item 3) https://github.com/flaxsearch/london-hackday-2016 > > I'm not sure there is a way to get a homogenous score - this patch tries > to keep you connected to the same replica during a session so you don't see > results jumping over pagination. > > Cheers > > Charlie > > > -- > Charlie Hull > Flax - Open Source Enterprise Search > > tel/fax: +44 (0)8700 118334 > mobile: +44 (0)7767 825828 > web: www.flax.co.uk > -- This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient, you must not copy this message or attachment or disclose the contents to any other person. If you have received this transmission in error, please notify the sender immediately and delete the message and any attachment from your system. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not accept liability for any omissions or errors in this message which may arise as a result of E-Mail-transmission or for damages resulting from any unauthorized changes of the content of this message and any attachment thereto. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not guarantee that this message is free of viruses and does not accept liability for any damages caused by any virus transmitted therewith. Click http://www.emdgroup.com/disclaimer to access the German, French, Spanish and Portuguese versions of this disclaimer.
