Erick Erickson created SOLR-7431:
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Summary: stateFormat=2 is not respected when collections are
recreated.
Key: SOLR-7431
URL: https://issues.apache.org/jira/browse/SOLR-7431
Project: Solr
Issue Type: Bug
Affects Versions: 5.1
Reporter: Erick Erickson
The following steps produce a clusterstate.json at the root of the Solr hive in
ZK rather than a state.json node under the collection.
0> Start separate ZK locally
1> create a collection with stock 5.x
2> shut down all solr nodes and Zookeeper
3> rm -rf /tmp/zookeeper
4> start ZK
5> upconfig your configuration
6> start the solr nodes.
When I created the nodes originally, the collection had a state.json node below
it, but after the above there was only the uber-clusterstate.json node and no
state.json below the collection.
Even in this state, new collections have the state.json as a child of the
collection.
I'm not quite sure what happens if you do something less drastic than blow the
entire ZK configuration away. Say you remove just one replica's information
from the ZK state, it's not clear to me where it gets re-added.
Of course this is not something that's very common, I ran in to it trying to
hack an upgrade from 4.x to 5.x and migrate from the single clusterstate.json
to state-per-collection.
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