On 6/18/2019 12:16 PM, ilango dhandapani wrote:
Tried several attempts like delete collection/config, take index backup from 5.3, clear index and place them back after upgrade. All tried resulted in faceting not working with 5.3 and 6.0 data combined.
Most likely what happened here is that the field classes you're using changed so they default to docValues="true" in version 6. When docValues is enabled on a field, Solr will use docValues for faceting and sorting ... and the existing data in the index from the old version may not actually have any docValues data.
I can clean up index and upgrade to 6.0 and reindex all from my DB. Here faceting works fine. Problem is I have less data in non prod but I have ~280 million records in prod and is growing daily. So cleaning and reindexing all of them from DB is going to take weeks.
You could *try* explicitly setting docValues="false" on the fields where you need to facet so that Solr will not try to use docValues for faceting ... but I can't guarantee that this is going to actually work.
Really what you need to do is reindex from scratch on the new version. Thanks, Shawn
