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Subject [GitHub] [beam] suztomo commented on a change in pull request #11090: [BEAM-9470] :sdks:java:io:kinesis:test is flaky
Date Wed, 11 Mar 2020 11:19:39 GMT
suztomo commented on a change in pull request #11090: [BEAM-9470] :sdks:java:io:kinesis:test
is flaky
URL: https://github.com/apache/beam/pull/11090#discussion_r390902538
 
 

 ##########
 File path: sdks/java/io/kinesis/src/test/java/org/apache/beam/sdk/io/kinesis/ShardReadersPoolTest.java
 ##########
 @@ -324,10 +325,15 @@ public void shouldCallRateLimitPolicy()
       }
     }
 
+    ArgumentCaptor<List<KinesisRecord>> recordsCaptor = ArgumentCaptor.forClass(List.class);
+    verify(customRateLimitPolicy, atLeastOnce()).onSuccess(recordsCaptor.capture());
+    List<List<KinesisRecord>> capturedRecords = recordsCaptor.getAllValues();
+    assertThat(capturedRecords).contains(
+        ImmutableList.of(a, b),
+        singletonList(c),
+        singletonList(d),
+        Collections.emptyList()
+    );
     verify(customRateLimitPolicy).onThrottle(same(e));
-    verify(customRateLimitPolicy).onSuccess(eq(ImmutableList.of(a, b)));
-    verify(customRateLimitPolicy).onSuccess(eq(singletonList(c)));
-    verify(customRateLimitPolicy).onSuccess(eq(singletonList(d)));
 
 Review comment:
   How about writing one-off code that invokes the test, say, 100 times and count test failures?
 We can verify whether your version fixes the flakiness.
   
   I don’t expect that one-off code to be checked in, but attaching the observation and
the code snippet to PR is helpful.

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