3723808 - Solr core startup failure due to "Unknown fieldType" error

• In Solr Admin (Cloud -> Graph), all cores display as down
• Commerce/Backoffice operations that depend on Solr fail. Full indexing attempts fail with errors similar to:
  • "Facet search has failed"
  • "Could not find a healthy node to handle the request." (from org.apache.solr.client.solrj.impl.CloudSolrClient)
  • "Re-trying request to collection(s) [...] after stale state error from server."
• Solr server logs show core load failures on startup, for example:
  • "SolrCore failed to load on startup"
  • "Could not load conf for core <collection>shard1_replica_n1: Can't load schema null: Unknown fieldType 'text_spell<lang>' specified on field spellcheck_<lang>"

SAP Commerce Cloud

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