Symptom
Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.
After a release was deployed, which was build with lower solr version than the one which was present in the release deployed previously, a solr collection is marked as “Down” in Solr Admin Console and one cannot execute search.
There are errors being logged like the following, pointing to issues with solr core:
org.apache.solr.common.SolrException: Error opening new searcher
org.apache.lucene.index.IndexFormatTooNewException: Format version is not supported (resource BufferedChecksumIndexInput(MMapIndexInput(path="/var/solr/master_backoffice_backoffice_product_flip_shard1_replica_n1/data/index/segments_2"))): 10 (needs to be between 7 and 9)
o.a.s.c.CoreContainer Error waiting for SolrCore to be loaded on startup => org.apache.solr.common.SolrException: Unable to create core [master_backoffice_backoffice_product_flip_shard1_replica_n1]
Reindexing of collection fails with errors pointing to solr core being in “Down” state:
"Could not export configuration for index: name=master_backoffice_backoffice_product_flip","name":"de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException","cause":{"commonElementCount":30,"localizedMessage":"Could not find a healthy node to handle the request."
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Environment
SAP Commerce Cloud
Product
Keywords
solr downgrade, format not supported , KBA , CEC-SCC-COM-SRC-SER , Search and Navigation , Problem
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