req.getCore().getCoreContainer().getCore(core_name) is returning null - Solr 8.2.0

[Arnold Bronley]

Hi,

In a custom Solr plugin code,
req.getCore().getCoreContainer().getCore(core_name) is returning null even
if core by name core_name is loaded and up in Solr. req is object
of SolrQueryRequest class. I am using Solr 8.2.0 in SolrCloud mode.

Any ideas on why this might be the case?