[jira] [Created] (SOLR-7130) Make stale state notification work without failing the requests

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

Shalin Shekhar Mangar created SOLR-7130:
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             Summary: Make stale state notification work without failing the requests
                 Key: SOLR-7130
                 URL: https://issues.apache.org/jira/browse/SOLR-7130
             Project: Solr
          Issue Type: Improvement
          Components: clients - java, SolrCloud, SolrJ
            Reporter: Shalin Shekhar Mangar
             Fix For: Trunk, 5.1


I wasn't sure whether to label this a bug or an improvement.

For collections with stateFormat=2, we now fail requests (because of stale state) which we didn't previously. The client having stale cached cluster state is not a sufficient reason to fail and retry the entire request because in most of such cases, the node receiving the request is still perfectly capable of returning a valid response (either from local replicas or remote ones).

We should find a better way to notify clients that they have stale state. Perhaps we can modify the response and add a "routing" section instead of outright exception.



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