Kimahriman commented on code in PR #4825:
URL: https://github.com/apache/zeppelin/pull/4825#discussion_r1779811023


##########
spark/spark-shims/src/main/java/org/apache/zeppelin/spark/SparkShims.java:
##########
@@ -58,7 +58,7 @@ public SparkShims(Properties properties) {
   private static SparkShims loadShims(int sparkMajorVersion, Properties 
properties, Object entryPoint)
       throws Exception {
     Class<?> sparkShimsClass;
-    if (sparkMajorVersion == 3) {
+    if (sparkMajorVersion == 3 || sparkMajorVersion == 4) {
       LOGGER.info("Initializing shims for Spark 3.x");
       sparkShimsClass = Class.forName("org.apache.zeppelin.spark.Spark3Shims");

Review Comment:
   I've been trying to remove the shims and consolidate things but I keep 
running into class loading errors and I'm not really sure what to do about it. 
I moved most from the shim into a `SparkInterpreterUtils` class in a 
`spark-common` module, but just keep running into
   
   ```
   IllegalAccess failed to access class 
org.apache.zeppelin.spark.SparkInterpreterUtils from class 
org.apache.zeppelin.spark.SparkScala213Interpreter 
(org.apache.zeppelin.spark.SparkInterpreterUtils is in unnamed module of loader 
'app'; org.apache.zeppelin.spark.SparkScala213Interpreter is in unnamed module 
of loader java.net.URLClassLoader @2c768ada)
   ```



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