Core Admin API - rename core issue on 8.11

[Shamik Bandopadhyay]

Hi,

  After upgrading from 7.5 to 8.11, the core admin API for renaming core
has stopped working. For e.g. when I try to run this,

https://internal-kp-stage.test.com/solr/admin/cores?action=RENAME&core=knowledge_shard1_replica_n1&other=knowledge

It throws the following error.

{
  "responseHeader": {
    "status": 400,
    "QTime": 140
  },
  "error": {
    "metadata": [
      "error-class",
      "org.apache.solr.common.SolrException",
      "root-error-class",
      "org.apache.solr.common.SolrException"
    ],
    "msg": "Not supported in SolrCloud",
    "code": 400
  }
}

This call works fine in 7.5 . As per the documentation, the API format
seems to be right.

https://solr.apache.org/guide/8_11/coreadmin-api.html#coreadmin-rename

Any pointers will be appreciated.

Thanks,
Shamik