[KAFKA-16935] Automatically wait for cluster startup in embedded Connect integration tests - ASF JIRA

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Details

Type: Improvement
Status: Resolved
Priority: Major
Resolution: Done
Affects Version/s: 3.8.0
Fix Version/s: 3.8.0
Component/s: None
Labels:
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Description

It's a common idiom in our integration tests to start an embedded Kafka and Connect cluster and then immediately afterwards wait for each worker in the Connect cluster to complete startup. Separating these two actions into separate steps makes our tests lengthier and can even lead to bugs and flakiness if the second step is accidentally omitted (see https://github.com/apache/kafka/pull/16286 for one example).

Instead, we should default to automatically awaiting the complete startup of every worker in an embedded Connect cluster when EmbeddedConnect::start is invoked, and require callers to opt out if they do not want to automatically wait for startup to complete when invoking that method.