eolivelli commented on a change in pull request #9565:
URL: https://github.com/apache/pulsar/pull/9565#discussion_r574562215
##########
File path:
pulsar-broker/src/test/java/org/apache/pulsar/broker/service/BrokerServiceTest.java
##########
@@ -1005,4 +1005,33 @@ public void generate(SimpleTextOutputStream stream) {
}
Assert.assertTrue(sb.toString().contains("test_metrics"));
}
+
+ @Test(timeOut = 20000L)
+ public void shouldNotPreventCreatingTopicWhenNonexistingTopicIsCached()
throws Exception {
+ // run multiple iterations to increase the chance of reproducing a
race condition in the topic cache
+ for (int i = 0; i < 100; i++) {
+ final String topicName =
"persistent://prop/ns-abc/topic-caching-test-topic" + i;
+ CountDownLatch latch = new CountDownLatch(1);
+ Thread getStatsThread = new Thread(() -> {
+ try {
+ latch.countDown();
+ // create race condition with a short delay
+ // the bug might not reproduce in all environments, this
works at least on i7-10750H CPU
+ Thread.sleep(1);
+ admin.topics().getStats(topicName);
+ fail("The topic should not exist yet.");
+ } catch (PulsarAdminException.NotFoundException e) {
+ // expected exception
+ } catch (PulsarAdminException | InterruptedException e) {
+ e.printStackTrace();
Review comment:
Nit: use Logger?
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