Andrzej Bialecki created SOLR-14245:
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             Summary: Validate Replica / ReplicaInfo on creation
                 Key: SOLR-14245
                 URL: https://issues.apache.org/jira/browse/SOLR-14245
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrCloud
            Reporter: Andrzej Bialecki
            Assignee: Andrzej Bialecki
             Fix For: 8.5


Replica / ReplicaInfo should be immutable and their fields should be validated 
on creation.

Some users reported that very rarely during a failed collection CREATE or 
DELETE, or when the Overseer task queue becomes corrupted, Solr may write to ZK 
incomplete replica infos (eg. node_name = null).

This problem is difficult to reproduce but we should add safeguards anyway to 
prevent writing such corrupted replica info to ZK.



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