3016265 - How to analyze Solr Synonym related issues

When the customer is not able to search the synonym text to get the correct result, during the full index or exporting synonyms from backoffice, there might be errors like:

"loggerName":"de.hybris.platform.solrfacetsearch.indexer.cron.SolrIndexerJob",
 "message":"Error during indexer call: [index name]",
 "thrown":{
 "commonElementCount":0,
 "localizedMessage":"de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException: Could not export configuration for index: name=[core name]",
 "message":"de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException: Could not export configuration for index: name=[core name]",
 "name":"de.hybris.platform.solrfacetsearch.indexer.exceptions.IndexerException",

...

or

"loggerName":"de.hybris.platform.solrfacetsearchbackoffice.panel.renderers.ExportSolrConfigurationPanelRenderer",
 "message":"Failed to export configuration",
 "thrown":{
 "commonElementCount":0,
 "localizedMessage":"Could not export configuration for index: name=[core name]",
 "message":"Could not export configuration for index: name=[core name]",
 "name":"de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException",
 "cause":{
 "commonElementCount":92,
 "localizedMessage":"org.apache.solr.client.solrj.SolrServerException: No live SolrServers available to handle this request:[http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]]",
 "message":"org.apache.solr.client.solrj.SolrServerException: No live SolrServers available to handle this request:[http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]]",
 "name":"de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException",
 "cause":{
 "commonElementCount":92,
 "localizedMessage":"No live SolrServers available to handle this request:[http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]]",
 "message":"No live SolrServers available to handle this request:[http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]]",
 "name":"org.apache.solr.client.solrj.SolrServerException",
 "cause":{
 "commonElementCount":92,
 "localizedMessage":"Error from server at http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]: [synonym] not found in /schema/analysis/synonyms/[language name]",
 "message":"Error from server at http://solr-0.solr.default.svc.cluster.local:8983/solr/[core name]: [synonym] not found in /schema/analysis/synonyms/[language name]",
 "name":"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException",

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KBA , CEC-SCC-COM-SRC-SER , Search and Navigation , How To