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https://issues.apache.org/jira/browse/PHOENIX-7251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17830692#comment-17830692
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ASF GitHub Bot commented on PHOENIX-7251:
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shahrs87 closed pull request #1849: PHOENIX-7251 Refactor server-side code to
support multiple ServerMetadataCache for HA tests
URL: https://github.com/apache/phoenix/pull/1849
> 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
> Priority: Major
>
> 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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