MartijnVisser commented on code in PR #23548:
URL: https://github.com/apache/flink/pull/23548#discussion_r1365088756
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pom.xml:
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@@ -1124,6 +1124,35 @@ under the License.
</build>
</profile>
+ <profile>
+ <id>java21</id>
+ <activation>
+ <jdk>[21,)</jdk>
+ </activation>
+
+ <properties>
+ <!-- Bump Scala because before 2.12.18 doesn't
compile on Java 21. -->
+ <scala.version>2.12.18</scala.version>
Review Comment:
Doing this will be a breaking change for Flink users that are upgrading from
a lower Flink version to this Flink version with a newer Java version, since
Scala 2.12.8 and higher have a breaking binary compatibility change that
impacts Flink snapshots
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