C0urante commented on code in PR #12478:
URL: https://github.com/apache/kafka/pull/12478#discussion_r963794209
##########
connect/runtime/src/test/java/org/apache/kafka/connect/runtime/errors/RetryWithToleranceOperatorTest.java:
##########
@@ -199,112 +202,156 @@ private RetryWithToleranceOperator setupExecutor() {
@Test
public void testExecAndHandleRetriableErrorOnce() throws Exception {
- execAndHandleRetriableError(1, 300, new RetriableException("Test"));
+ execAndHandleRetriableError(6000, 1, Collections.singletonList(300L),
new RetriableException("Test"), true);
}
@Test
public void testExecAndHandleRetriableErrorThrice() throws Exception {
- execAndHandleRetriableError(3, 2100, new RetriableException("Test"));
+ execAndHandleRetriableError(6000, 3, Arrays.asList(300L, 600L, 1200L),
new RetriableException("Test"), true);
+ }
+
+ @Test
+ public void testExecAndHandleRetriableErrorWithInfiniteRetries() throws
Exception {
+ execAndHandleRetriableError(-1, 8, Arrays.asList(300L, 600L, 1200L,
2400L, 4800L, 9600L, 19200L, 38400L), new RetriableException("Test"), true);
+ }
+
+ @Test
+ public void testExecAndHandleRetriableErrorWithMaxRetriesExceeded() throws
Exception {
+ execAndHandleRetriableError(6000, 10, Arrays.asList(300L, 600L, 1200L,
2400L, 1500L), new RetriableException("Test"), false);
}
@Test
public void testExecAndHandleNonRetriableErrorOnce() throws Exception {
- execAndHandleNonRetriableError(1, 0, new Exception("Non Retriable
Test"));
+ execAndHandleNonRetriableError(1, new Exception("Non Retriable Test"));
}
@Test
public void testExecAndHandleNonRetriableErrorThrice() throws Exception {
- execAndHandleNonRetriableError(3, 0, new Exception("Non Retriable
Test"));
+ execAndHandleNonRetriableError(3, new Exception("Non Retriable Test"));
}
- public void execAndHandleRetriableError(int numRetriableExceptionsThrown,
long expectedWait, Exception e) throws Exception {
+ @Test
+ public void testExitLatch() throws Exception {
MockTime time = new MockTime(0, 0, 0);
- RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(6000, ERRORS_RETRY_MAX_DELAY_DEFAULT, ALL, time);
+ CountDownLatch exitLatch =
EasyMock.createStrictMock(CountDownLatch.class);
+ RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(-1, ERRORS_RETRY_MAX_DELAY_DEFAULT, ALL, time, new
ProcessingContext(), exitLatch);
retryWithToleranceOperator.metrics(errorHandlingMetrics);
+ EasyMock.expect(mockOperation.call()).andThrow(new
RetriableException("test")).anyTimes();
+ EasyMock.expect(exitLatch.await(300,
TimeUnit.MILLISECONDS)).andAnswer(() -> {
+ time.sleep(300);
+ return false;
+ });
+ EasyMock.expect(exitLatch.await(600,
TimeUnit.MILLISECONDS)).andAnswer(() -> {
+ time.sleep(600);
+ return false;
+ });
+ EasyMock.expect(exitLatch.await(1200,
TimeUnit.MILLISECONDS)).andAnswer(() -> {
+ time.sleep(1200);
+ return false;
+ });
+ EasyMock.expect(exitLatch.await(2400,
TimeUnit.MILLISECONDS)).andAnswer(() -> {
+ time.sleep(2400);
+ retryWithToleranceOperator.triggerStop();
+ return false;
+ });
-
EasyMock.expect(mockOperation.call()).andThrow(e).times(numRetriableExceptionsThrown);
- EasyMock.expect(mockOperation.call()).andReturn("Success");
-
- replay(mockOperation);
+ // expect no more calls to exitLatch.await() after
retryWithToleranceOperator.triggerStop() is called
- String result =
retryWithToleranceOperator.execAndHandleError(mockOperation, Exception.class);
- assertFalse(retryWithToleranceOperator.failed());
- assertEquals("Success", result);
- assertEquals(expectedWait, time.hiResClockMs());
+ exitLatch.countDown();
+ EasyMock.expectLastCall().once();
+ replay(mockOperation, exitLatch);
+ retryWithToleranceOperator.execAndHandleError(mockOperation,
Exception.class);
+ assertTrue(retryWithToleranceOperator.failed());
+ assertEquals(4500L, time.milliseconds());
PowerMock.verifyAll();
}
- public void execAndHandleNonRetriableError(int
numRetriableExceptionsThrown, long expectedWait, Exception e) throws Exception {
+ public void execAndHandleRetriableError(long errorRetryTimeout, int
numRetriableExceptionsThrown, List<Long> expectedWaits, Exception e, boolean
successExpected) throws Exception {
MockTime time = new MockTime(0, 0, 0);
- RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(6000, ERRORS_RETRY_MAX_DELAY_DEFAULT, ALL, time);
+ CountDownLatch exitLatch =
EasyMock.createStrictMock(CountDownLatch.class);
+ RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(errorRetryTimeout, ERRORS_RETRY_MAX_DELAY_DEFAULT,
ALL, time, new ProcessingContext(), exitLatch);
retryWithToleranceOperator.metrics(errorHandlingMetrics);
EasyMock.expect(mockOperation.call()).andThrow(e).times(numRetriableExceptionsThrown);
EasyMock.expect(mockOperation.call()).andReturn("Success");
+ for (Long expectedWait : expectedWaits) {
+ EasyMock.expect(exitLatch.await(expectedWait,
TimeUnit.MILLISECONDS)).andAnswer(() -> {
+ time.sleep(expectedWait);
+ return false;
+ });
+ }
- replay(mockOperation);
+ replay(mockOperation, exitLatch);
String result =
retryWithToleranceOperator.execAndHandleError(mockOperation, Exception.class);
- assertTrue(retryWithToleranceOperator.failed());
- assertNull(result);
- assertEquals(expectedWait, time.hiResClockMs());
+
+ if (successExpected) {
+ assertFalse(retryWithToleranceOperator.failed());
+ assertEquals("Success", result);
+ } else {
+ assertTrue(retryWithToleranceOperator.failed());
+ }
PowerMock.verifyAll();
}
- @Test
- public void testCheckRetryLimit() {
+ public void execAndHandleNonRetriableError(int
numRetriableExceptionsThrown, Exception e) throws Exception {
MockTime time = new MockTime(0, 0, 0);
- RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(500, 100, NONE, time);
-
- time.setCurrentTimeMs(100);
- assertTrue(retryWithToleranceOperator.checkRetry(0));
+ CountDownLatch exitLatch =
EasyMock.createStrictMock(CountDownLatch.class);
+ RetryWithToleranceOperator retryWithToleranceOperator = new
RetryWithToleranceOperator(6000, ERRORS_RETRY_MAX_DELAY_DEFAULT, ALL, time, new
ProcessingContext(), exitLatch);
+ retryWithToleranceOperator.metrics(errorHandlingMetrics);
- time.setCurrentTimeMs(200);
- assertTrue(retryWithToleranceOperator.checkRetry(0));
+
EasyMock.expect(mockOperation.call()).andThrow(e).times(numRetriableExceptionsThrown);
+ EasyMock.expect(mockOperation.call()).andReturn("Success");
- time.setCurrentTimeMs(400);
- assertTrue(retryWithToleranceOperator.checkRetry(0));
+ // expect no call to exitLatch.await() which is only called during the
retry backoff
- time.setCurrentTimeMs(499);
- assertTrue(retryWithToleranceOperator.checkRetry(0));
+ replay(mockOperation, exitLatch);
- time.setCurrentTimeMs(501);
- assertFalse(retryWithToleranceOperator.checkRetry(0));
+ String result =
retryWithToleranceOperator.execAndHandleError(mockOperation, Exception.class);
+ assertTrue(retryWithToleranceOperator.failed());
+ assertNull(result);
- time.setCurrentTimeMs(600);
- assertFalse(retryWithToleranceOperator.checkRetry(0));
+ PowerMock.verifyAll();
Review Comment:
If we don't actually invoke `mockOperation` more than once in any of the
test cases with non-retriable errors, do we even need different test cases for
1 vs. 3 invocations? What's the difference between the two?
I also don't really follow why we're only verifying `mockOperation` in the
success cases with retriable errors; what's preventing us from verifying it
unconditionally?
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