The problem change is that Solr 9 comes with a new security policy enabled by default (it actually existed in Solr 8 too, but it was disabled by default) which does not include the location of those files , so it cannot load the XWiki cores.
The easiest workaround to go back to Solr 8 behavior is to disable SOLR_SECURITY_MANAGER_ENABLED in /etc/default/solr.in.sh. |
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