Palash Chauhan created PHOENIX-7251:
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Summary: Refactor server-side code to support multiple
ServerMetadataCache for HA tests
Key: PHOENIX-7251
URL: https://issues.apache.org/jira/browse/PHOENIX-7251
Project: Phoenix
Issue Type: Sub-task
Reporter: Palash Chauhan
Assignee: Palash Chauhan
In the metadata caching re-design, `ServerMetadataCache` is required to be a
singleton in the implementation. This affects tests for the HA use case because
the coprocessors on the 2 clusters end up using the same `ServerMetadataCache`.
All tests which execute queries with 1 of the clusters unavailable will fail.
We can refactor the implementation in the following way to support HA test
cases:
1. Create a `ServerMetadataCache` interface and use the current implementation
as `ServerMetadataCacheImpl` for all other tests. This would be a singleton.
2. Implement `ServerMetadataCacheHAImpl` with a map of instances keyed on
config.
3. Extend `PhoenixRegionServerEndpoint` and use `ServerMetadataCacheHAImpl`.
4. In HA tests, load this new endpoint on the region servers.
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