BewareMyPower commented on code in PR #25246:
URL: https://github.com/apache/pulsar/pull/25246#discussion_r2810915058
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pulsar-metadata/src/test/java/org/apache/pulsar/metadata/MetadataCacheTest.java:
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@@ -739,4 +741,18 @@ public void testNoBackoffMetadataCacheConfig() {
assertTrue(backoff.isMandatoryStopMade());
assertEquals(backoff.getFirstBackoffTimeInMillis(), 0);
}
+
+ @Test
+ public void testRefreshRace() throws Exception {
+ @Cleanup final var store = new
LocalMemoryMetadataStore("memory:local", MetadataStoreConfig.builder().build());
+ final var cache = store.getMetadataCache(String.class);
+ for (int i = 0; i < 500; i++) {
+ final var key = "/key" + i;
+ assertTrue(cache.get(key).get().isEmpty());
+
+ store.put(key, "\"value\"".getBytes(StandardCharsets.UTF_8),
Optional.empty()).get();
+
Awaitility.await().pollInterval(Duration.ofMillis(1)).atMost(Duration.ofSeconds(3)).untilAsserted(()
->
Review Comment:
The `put` operation is called on the `MetadataStore` object. The
`MetadataCache#accept` method is not guaranteed to be called immediately after
the `put` operation is done because the notification callback is executed in
the dedicated `metadata-store-event` thread.
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