Yes, I recommend starting with a v9 solrconfig.xml. Alos a good idea to start with a v9.x schema.xml and add in changes. As I recall, some field types are no longer supported. Consider changing int -> pint, float ->pfloat...
I migrated Solr 6.4 to 9.4. Matt On Thu, Nov 20, 2025 at 4:53 PM Shaun Campbell <[email protected]> wrote: > I'm just migrating a small on-premises set up with 2 cores that are > swapped. It's got a schema.xml and solrconfig.xml has been modified to add > request handlers etc. > > I thought it was all working and then noticed in the logs there was an > error due to LRUCache that had been removed in 9.10. I then realised that > solrconfig.xml could be significantly different in 9.10. Am I right in > thinking the best way to migrate is to take an out of the box 9.10 > solrconfig.xml instead and put the customisations from Solr 6 back into it? > Any other tips on what I should look out for in Solr 9.10 solrconfig.xml? > > Thanks in advance > Shaun >
