Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/4052#discussion_r119867943
--- Diff:
flink-tests/src/test/java/org/apache/flink/test/streaming/runtime/CoGroupJoinITCase.java
---
@@ -324,6 +329,41 @@ public void invoke(String value) throws Exception {
Assert.assertEquals(expectedResult, testResults);
}
+ @Test
+ public void testCoGroupOperatorWithCheckpoint() throws Exception {
--- End diff --
Maybe mention that this is meant to check the snapshotting and the problem
that was previously undetected.
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