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https://issues.apache.org/jira/browse/KAFKA-17112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ao Li closed KAFKA-17112.
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> StreamThread shutdown calls completeShutdown only in CREATED state
> ------------------------------------------------------------------
>
> Key: KAFKA-17112
> URL: https://issues.apache.org/jira/browse/KAFKA-17112
> Project: Kafka
> Issue Type: Bug
> Components: streams, unit tests
> Affects Versions: 3.9.0
> Reporter: Ao Li
> Assignee: Ao Li
> Priority: Minor
> Fix For: 4.0.0
>
>
> While running tests in `StreamThreadTest.java` in kafka/streams, I noticed
> the test left many lingering threads. Though the class runs `shutdown` after
> each test, the shutdown only executes `completeShutdown` if the StreamThread
> is in CREATED state. See
> [https://github.com/apache/kafka/blob/0b11971f2c94f7aadc3fab2c51d94642065a72e5/streams/src/test/java/org/apache/kafka/streams/processor/internals/StreamThreadTest.java#L231]
> and
> [https://github.com/apache/kafka/blob/0b11971f2c94f7aadc3fab2c51d94642065a72e5/streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamThread.java#L1435]
>
> For example, you may run test
> org.apache.kafka.streams.processor.internals.StreamThreadTest#shouldNotCloseTaskProducerWhenSuspending
> with commit 0b11971f2c94f7aadc3fab2c51d94642065a72e5. When the test calls
> `thread.shutdown()`, the thread is in `PARTITIONS_REVOKED` state. Thus,
> `completeShutdown` is not called. The test creates three lingering threads: 2
> `StateUpdater` and 1 `TaskExecutor`
>
> This means that calls to `thread.shutdown` has no effect in
> `StreamThreadTest.java`.
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