FrankChen021 commented on code in PR #19622:
URL: https://github.com/apache/druid/pull/19622#discussion_r3466975683
##########
embedded-tests/src/test/java/org/apache/druid/testing/embedded/indexing/autoscaler/CostBasedAutoScalerIntegrationTest.java:
##########
@@ -180,6 +180,54 @@ public void
test_autoScaler_computesOptimalTaskCountAndProducesScaleUp()
cluster.callApi().postSupervisor(kafkaSupervisorSpec.createSuspendedSpec());
}
+ @Test
+ public void
test_autoScaler_computesOptimalTaskCountAndProducesScaleUp_withUtilizationRatio()
+ {
+
+ final int lowInitialTaskCount = 1;
+ // This ensures tasks are busy processing (low idle ratio)
+ Executors.newSingleThreadExecutor().submit(() -> {
Review Comment:
[P2] Shut down the background publisher executor
The new test creates a single-thread ExecutorService and immediately drops
it. That executor uses a non-daemon worker and is never shut down, so the
embedded-test JVM can stay alive after the test returns; on timeout or failure
it can also keep publishing into the topic while cleanup is running. Keep a
reference and shut it down/cancel the Future in a finally block or use an
existing managed executor.
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