Russole opened a new pull request, #23271:
URL: https://github.com/apache/kafka/pull/23271

   ## Summary
   
   Speed up several Streams restart-based integration tests by leaving the 
group before immediate restarts with the same `application.id`.
   
   ## Testing
   
   Ran affected integration test methods:
   
   ```bash
   ./gradlew :streams:integration-tests:integrationTest \
     --tests 
org.apache.kafka.streams.integration.SelfJoinUpgradeIntegrationTest.shouldUpgradeWithTopologyOptimizationOff
 \
     --tests 
org.apache.kafka.streams.integration.SelfJoinUpgradeIntegrationTest.shouldRestartWithTopologyOptimizationOn
 \
     --tests 
org.apache.kafka.streams.integration.SessionsStoreWithHeadersTest.shouldRestore 
\
     --tests 
org.apache.kafka.streams.integration.SessionsStoreWithHeadersTest.shouldManualUpgradeFromTimestampedToHeaders
 \
     --tests 
org.apache.kafka.streams.integration.TimestampedKeyValueStoreWithHeadersTest.shouldRestore
 \
     --tests 
org.apache.kafka.streams.integration.TimestampedKeyValueStoreWithHeadersTest.shouldManualUpgradeFromTimestampedToHeaders
 \
     --tests 
org.apache.kafka.streams.integration.TimestampedWindowStoreWithHeadersTest.shouldRestore
 \
     --tests 
org.apache.kafka.streams.integration.TimestampedWindowStoreWithHeadersTest.shouldManualUpgradeFromTimestampedToHeaders
 \
     --tests 
org.apache.kafka.streams.integration.VersionedKeyValueStoreIntegrationTest.shouldRestore
 \
     --tests 
org.apache.kafka.streams.integration.VersionedKeyValueStoreIntegrationTest.shouldManualUpgradeFromNonVersionedTimestampedToVersioned
 \
     --tests 
org.apache.kafka.streams.integration.VersionedKeyValueStoreIntegrationTest.shouldManualUpgradeFromNonVersionedNonTimestampedToVersioned
    ```
   ## Runtime comparison
   Before this change: `3m 16s`  
   After this change: `35s`


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