[GitHub] [iceberg] openinx commented on a change in pull request #4189: Flink 1.14: Fix the flaky testHashDistributeMode by controlling rows in one checkpoint precisely

[GitBox <gi...@apache.org>]

openinx commented on a change in pull request #4189:
URL: https://github.com/apache/iceberg/pull/4189#discussion_r811852248



##########
File path: flink/v1.14/flink/src/test/java/org/apache/iceberg/flink/TestFlinkTableSink.java
##########
@@ -253,15 +258,24 @@ public void testHashDistributeMode() throws Exception {
         "write.format.default", format.name(),
         TableProperties.WRITE_DISTRIBUTION_MODE, DistributionMode.HASH.modeName()
     );
+
+    // Initialize a BoundedSource table to precisely control that those 9 rows will be emitted in only one checkpoint.
+    List<Row> dataSet = ImmutableList.of(
+        Row.of(1, "aaa"), Row.of(1, "bbb"), Row.of(1, "ccc"),
+        Row.of(2, "aaa"), Row.of(2, "bbb"), Row.of(2, "ccc"),
+        Row.of(3, "aaa"), Row.of(3, "bbb"), Row.of(3, "ccc"));
+    String dataId = BoundedTableFactory.registerDataSet(ImmutableList.of(dataSet));

Review comment:
       I think a single checkpoint is good enough to validate the PartitionKeySelector. More checkpoints will make the unit test more complex but validate the same thing in my mind. 
   
   Mocking more records as the testing data set looks good to me.




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