The follow-up here from JIRA is that, as of Solr 8.0, you must not add "_root_"
to a schema for an existing collection. Solr uses this field instead of the
uniqueKey for certain identity checks. Chaos will ensue if you add it later.
I shall update the ref guide to add a warning.
~ David
On
I have opened a JIRA ticket for this now
https://issues.apache.org/jira/browse/SOLR-15468
Would be great if someone could have a look and help.
Thank you,
Andreas
--
Sent from: https://lucene.472066.n3.nabble.com/Solr-User-f472068.html
The error seems to happens for every kind of partial update / atomic update
when the _root_ field was added to the schema of an existing index.
This means, Solr 8.8.2 now requires a full reindex when one adds the _root_
field to the schema of an existing index. Previously (Solr 8.6.3) this
wasn't
