Patson Luk created SOLR-16860:
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Summary: Coordinator ZkStateReader's watch is not removed upon
collection deletion
Key: SOLR-16860
URL: https://issues.apache.org/jira/browse/SOLR-16860
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCloud
Affects Versions: 9.2.1
Reporter: Patson Luk
Core registration in CoordinatorHttpCall correctly registers watch in
ZkStateReader as in
https://github.com/apache/solr/blob/f774922ecf44b18b78435cef8735618bb793ac30/solr/core/src/java/org/apache/solr/servlet/CoordinatorHttpSolrCall.java#L99,
however there’s no code to remove such watch on collection deletion (state
update).
For non coordinator node, it’s done at UnloadCoreOnDeleteWatcher at
https://github.com/apache/solr/blob/main/solr/core/src/java/org/apache/solr/cloud/ZkController.java#L2869
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