dongjoon-hyun commented on a change in pull request #33894:
URL: https://github.com/apache/spark/pull/33894#discussion_r701261718



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/errors/QueryCompilationErrors.scala
##########
@@ -2333,7 +2333,12 @@ object QueryCompilationErrors {
   }
 
   def cannotModifyValueOfSparkConfigError(key: String): Throwable = {
-    new AnalysisException(s"Cannot modify the value of a Spark config: $key")
+    new AnalysisException(
+      s"""
+      |Cannot modify the value of a Spark config: $key,
+      |please set spark.sql.legacy.setCommandRejectsSparkCoreConfs as 'false' 
in
+      |order to make change value of Spark config: $key .

Review comment:
       The point is that we are trying to avoid hard-wiring the confs because 
we forget them easily. 
   Maybe, we can give an indirect link like migration instead. WDTY?




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