chia7712 commented on code in PR #20751:
URL: https://github.com/apache/kafka/pull/20751#discussion_r2461184891
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clients/src/test/java/org/apache/kafka/common/header/internals/RecordHeadersTest.java:
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@@ -265,4 +273,36 @@ static void assertHeader(String key, String value, Header
actual) {
assertArrayEquals(value.getBytes(), actual.value());
}
+ @RepeatedTest(100)
+ public void testRecordHeaderIsReadThreadSafe() throws Exception {
+ int threads = 8;
+ RecordHeader header = new RecordHeader(
+ ByteBuffer.wrap("key".getBytes(StandardCharsets.UTF_8)),
+ ByteBuffer.wrap("value".getBytes(StandardCharsets.UTF_8))
+ );
+
+ ExecutorService pool = Executors.newFixedThreadPool(threads);
+ CountDownLatch startLatch = new CountDownLatch(1);
+ AtomicBoolean raceDetected = new AtomicBoolean(false);
+
+ Runnable task = () -> {
+ try {
+ startLatch.await();
+ header.key();
+ header.value();
+ } catch (NullPointerException e) {
+ raceDetected.set(true);
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ };
+
+ for (int i = 0; i < threads; i++) pool.submit(task);
+
+ startLatch.countDown();
+ pool.shutdown();
Review Comment:
Could you use `try-finally` to ensure the release?
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