XComp commented on code in PR #21736:
URL: https://github.com/apache/flink/pull/21736#discussion_r1183451608


##########
flink-tests/src/test/java/org/apache/flink/test/state/operator/restore/AbstractOperatorRestoreTestBase.java:
##########
@@ -71,7 +80,17 @@
  * AbstractOperatorRestoreTestBase#migrateJob}, please create the 
corresponding test resource
  * directory and copy the _metadata file by hand.
  */
-public abstract class AbstractOperatorRestoreTestBase extends TestLogger {
+public abstract class AbstractOperatorRestoreTestBase extends TestLogger 
implements MigrationTest {
+
+    private static final FlinkVersion MIGRATION_BASE_VERSION = 
FlinkVersion.v1_16;

Review Comment:
   I feel like we need more documentation here, i.e. in-code comments. What 
about not using a dedicated final field here. We're using it in one place only, 
anyway. Additionally, can't we use 1.8 to make it clearer that the version 
doesn't matter?



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