Tim Owen created SOLR-11832:
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Summary: Restore from backup creates old format collections
Key: SOLR-11832
URL: https://issues.apache.org/jira/browse/SOLR-11832
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Backup/Restore
Affects Versions: 6.6.2, 7.2
Reporter: Tim Owen
Restoring a collection from a backup always creates the new collection using
the old format state json (format 1), as a global clusterstate.json file at top
level of ZK. All new collections should be defaulting to use the newer
per-collection (format 2) in /collections/.../state.json
As we're running clusters with many collections, the old global state format
isn't good for us, so as a workaround for now we're calling MIGRATESTATEFORMAT
immediately after the RESTORE call.
This bug was mentioned in the comments of SOLR-5750 and also recently mentioned
by [~varunthacker] in SOLR-11560
Code patch attached, but as per [~dsmiley]'s comment in the code, fixing this
means at least 1 test class doesn't succeed anymore. From what I can tell, the
BasicDistributedZk2Test fails because it's not using the official collection
API to create a collection, it seems to be bypassing that and manually creating
cores using the core admin api instead, which I think is not enough to ensure
the correct ZK nodes are created. The test superclass has some methods to
create a collection which do use the collection api so I could try fixing the
tests (I'm just not that familiar with why those BasicDistributed*Test classes
aren't using the collection api).
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