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3521735 - Error loading class 'solr.FastLRUCache' at org.apache.solr.core.SolrResourceLoader.findClass after upgrading to solr 9

Symptom

After upgrading the solr to 9.x, the error occurs in the backend/Solr Admin:

o.a.s.s.CacheConfig Error instantiating cache => org.apache.solr.common.SolrException: Error loading class 'solr.FastLRUCache' at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:551)

o.a.s.s.CacheConfig Error instantiating cache => org.apache.solr.common.SolrException: Error loading class 'solr.LRUCache' at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:551)

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."


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Environment

SAP Commerce Cloud

Product

SAP Commerce Cloud 2211

Keywords

LRUCache, FastLRUCache, CaffeineCache, memory, solr upgrade, CacheConfig , KBA , CEC-SCC-COM-SRC-SER , Search and Navigation , Problem

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