David Smiley created SOLR-16909:
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Summary: Collections LIST command should fetch ZK data, not cached
state
Key: SOLR-16909
URL: https://issues.apache.org/jira/browse/SOLR-16909
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCloud
Reporter: David Smiley
The LIST command to the Collections API presently returns all collections from
the cached ClusterState. The proposal here is to fetch the child nodes in
ZooKeeper instead. While the distinction is minor, the intent is to improve
robustness / comprehensiveness. It may mean a collection is listed that is
being created or being deleted that otherwise might not have been returned.
The scenario driving this is to facilitate cleanup daemons that identify
potentially left-over data from a collection creation or deletion that maybe
failed (partial create or delete).
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