m1a2st commented on code in PR #22520:
URL: https://github.com/apache/kafka/pull/22520#discussion_r3506284746
##########
test-common/test-common-runtime/src/main/java/org/apache/kafka/common/test/junit/ClusterTestExtensions.java:
##########
@@ -108,10 +108,16 @@ public class ClusterTestExtensions implements
TestTemplateInvocationContextProvi
private static final String ATTACH_LISTENER_THREAD_PREFIX = "Attach
Listener";
private static final String PROCESS_REAPER_THREAD_PREFIX = "process
reaper";
private static final String RMI_THREAD_PREFIX = "RMI";
+ // The following three thread prefixes are spawned by MockOAuth2Server
(which uses OkHttp's MockWebServer
+ // internally) in ClientOAuthIntegrationTest.
+ private static final String MOCK_WEB_SERVER_THREAD_PREFIX =
"MockWebServer";
+ private static final String KEEP_ALIVE_TIMER_THREAD_PREFIX =
"Keep-Alive-Timer";
+ private static final String POOL_THREAD_PREFIX = "pool-";
Review Comment:
The test error log is
```
Thread leak detected: pool-11-thread-1, pool-10-thread-1, pool-8-thread-1
Expected :true
Actual :false
<Click to see difference>
org.opentest4j.AssertionFailedError: Thread leak detected: pool-11-thread-1,
pool-10-thread-1, pool-8-thread-1 ==> expected: <true> but was: <false>
at
org.apache.kafka.common.test.junit.ClusterTestExtensions.afterEach(ClusterTestExtensions.java:192)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at
java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
at
java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
```
[test.log](https://github.com/user-attachments/files/29553318/test.log)
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