[jira] [Created] (SOLR-16631) solr.shardsWhitelist - hostnames should be treated in case insensitive way

["Paul Blanchaert (Jira)" <ji...@apache.org>]

Paul Blanchaert created SOLR-16631:
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             Summary: solr.shardsWhitelist - hostnames should be treated in case insensitive way
                 Key: SOLR-16631
                 URL: https://issues.apache.org/jira/browse/SOLR-16631
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrCloud
    Affects Versions: 9.1, 8.11, 9.0
            Reporter: Paul Blanchaert


Given that hostnames should be case insensitive (see [rfc3986;section-6.2.2.1|https://www.rfc-editor.org/rfc/rfc3986#section-6.2.2.1]), the check for should also consider hostnames in urls in a case insentive way.
That is not the case (not in Solr 8 and not after refactoring in Solr 9).

Most people are using always lowercases for hostnames in urls, so probably not encountered that often and there is an easy and quick fix by changing the parameter to match the actual cases used in the hostname, hence priority is "Minor". But still, it is better to comply with well-established rules.

Easy test via changing 1 char to uppercase in the hostname of the unit test  AllowListUrlCheckerTest.testSingleHost().
E.g. test result:
URL http://abc-1.Com:8983/solr is neither a live node of the cluster nor in the configured 'allowUrls' [abc-1.com:8983]
org.apache.solr.common.SolrException: URL http://abc-1.Com:8983/solr is neither a live node of the cluster nor in the configured 'allowUrls' [abc-1.com:8983]




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