Jerry Chung created SOLR-18391:
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Summary: PlacementPluginAssignStrategy.assign() NPE on null
getCollection() during collection creation leaves zombie collection with no
replicas
Key: SOLR-18391
URL: https://issues.apache.org/jira/browse/SOLR-18391
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Server
Affects Versions: 10.0
Reporter: Jerry Chung
* Where it happens ({{{}PlacementPluginAssignStrategy.assign(){}}})
* What causes it (null from {{getCollection()}} — the race between
{{waitForState}} and {{getClusterState()}} in {{{}CreateCollectionCmd{}}})
* The consequence (zombie collection with 0 replicas, no cleanup — unlike the
{{Assign.AssignmentException}} path which calls {{{}DeleteCollectionCmd{}}})
The NPE hits {{catch (Exception ex) \{ throw new SolrException(SERVER_ERROR,
null, ex); }}} with a null message, bypassing the cleanup code, making the
error hard to diagnose on the client side.
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