FrankChen021 opened a new pull request, #20319:
URL: https://github.com/apache/druid/pull/20319
Related to #20312 (item 3, `QueryLaningTest`).
### Description
`QueryLaningTest.test_queryUsesLaneInQueryContext_inManualStrategy` failed
on master with:
```
ISE: Timed out waiting for event after [100,000]ms
at LatchableEmitter.waitForEventAggregate
at
EmbeddedClusterApis.waitForAllSegmentsToBeAvailable(EmbeddedClusterApis.java:316)
at QueryTestBase.ingestBasicData(QueryTestBase.java:131)
```
Example:
https://github.com/apache/druid/actions/runs/34432737655/job/102731457738.
`waitForAllSegmentsToBeAvailable` waits for the aggregate
`segment/schemaCache/refresh/count` emitted by the Broker to reach the number
of used segments. That is an indirect signal for what the query tests actually
need: the segments being available and the datasource being present in the SQL
schema.
#### Changes
* Add `EmbeddedClusterApis.waitForAllSegmentsToBeQueryable(dataSource,
coordinator, timeoutMillis)`, which polls the Broker for the state SQL queries
observe: the number of `is_available = 1` rows in `sys.segments` for the
datasource reaching the number of non-tombstone used segments, and the
datasource appearing in `INFORMATION_SCHEMA.TABLES`. It uses the existing
`ResultWaiter` and reports the last observed value on timeout.
* Use it from `QueryTestBase.ingestBasicData()`, which is the only call site
changed. `waitForAllSegmentsToBeAvailable` and its other callers are untouched.
Verified locally with `mvn -pl services,embedded-tests -am test-compile`.
The embedded query tests were not run locally.
<hr>
##### Key changed/added classes in this PR
* `EmbeddedClusterApis`
* `QueryTestBase`
<hr>
This PR has:
- [x] been self-reviewed.
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