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KAFKA-12747: Fix flakiness in shouldReturnUUIDsWithStringPrefix #10643

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merged 3 commits into from
May 10, 2021
Merged

KAFKA-12747: Fix flakiness in shouldReturnUUIDsWithStringPrefix #10643

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0acf3cc
fix flakiness
guozhangwang May 6, 2021
565d738
Merge branch 'trunk' of https://github.com/apache/kafka into K12747-f…
guozhangwang May 10, 2021
27132ba
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guozhangwang May 10, 2021
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9 changes: 4 additions & 5 deletions streams/src/test/java/org/apache/kafka/streams/state/internals/RocksDBStoreTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -439,6 +439,8 @@ public void shouldReturnUUIDsWithStringPrefix() {
final UUID uuid1 = UUID.randomUUID();
final UUID uuid2 = UUID.randomUUID();
final String prefix = uuid1.toString().substring(0, 4);
final int numMatches = uuid2.toString().substring(0, 4).equals(prefix) ? 2 : 1;

entries.add(new KeyValue<>(
new Bytes(uuidSerializer.serialize(null, uuid1)),
stringSerializer.serialize(null, "a")));
Expand All @@ -451,17 +453,14 @@ public void shouldReturnUUIDsWithStringPrefix() {
rocksDBStore.flush();

final KeyValueIterator<Bytes, byte[]> keysWithPrefix = rocksDBStore.prefixScan(prefix, stringSerializer);
final List<String> valuesWithPrefix = new ArrayList<>();
int numberOfKeysReturned = 0;

while (keysWithPrefix.hasNext()) {
final KeyValue<Bytes, byte[]> next = keysWithPrefix.next();
valuesWithPrefix.add(new String(next.value));
keysWithPrefix.next();
numberOfKeysReturned++;
}

assertThat(numberOfKeysReturned, is(1));
assertThat(valuesWithPrefix.get(0), is("a"));
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I would still try to keep this assertion, something among the lines of:

if (clashOnPrefix) {
    assertThat(valuesWithPrefix.get(0), either(is("a")).or(is("b")));
} else {
    assertThat(valuesWithPrefix.get(0), is("a"));
}

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SG, I will do that upon merging.

assertThat(numberOfKeysReturned, is(numMatches));
}

@Test
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