wForget commented on code in PR #4097:
URL: https://github.com/apache/datafusion-comet/pull/4097#discussion_r3151233479


##########
pom.xml:
##########
@@ -682,6 +682,30 @@ under the License.
       </properties>
     </profile>
 
+    <profile>
+      <!-- WIP: Spark 4.1 support, with its own shim sources for 4.1-specific 
APIs -->
+      <id>spark-4.1</id>
+      <properties>
+        <!-- Spark 4.1.1 is compiled against Scala 2.13.17 and emits calls 
into stdlib methods
+             added in that release (e.g. 
MurmurHash3$.caseClassHash$default$2()). Comet must
+             match to avoid runtime NoSuchMethodError. Note: 
semanticdb-scalac_2.13.17 is not
+             yet published, so the -Psemanticdb / scalafix lint job is skipped 
for spark-4.1. -->
+        <scala.version>2.13.17</scala.version>

Review Comment:
   Will there be any issues upgrading the scala version in the `scala-2.13` 
profile to `2.13.17`?



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