Ao Li created KAFKA-17112:
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Summary: 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
Affects Versions: 3.9.0
Reporter: Ao Li
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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