heyihong commented on code in PR #43772:
URL: https://github.com/apache/spark/pull/43772#discussion_r1437560276


##########
connector/connect/common/src/main/scala/org/apache/spark/sql/connect/client/GrpcExceptionConverter.scala:
##########
@@ -367,14 +367,20 @@ private[client] object GrpcExceptionConverter {
     implicit val formats = DefaultFormats
     val classes =
       JsonMethods.parse(info.getMetadataOrDefault("classes", 
"[]")).extract[Array[String]]
-
-    errorsToThrowable(
-      0,
-      Seq(
-        FetchErrorDetailsResponse.Error
+    val errorClass = info.getMetadataOrDefault("errorClass", null)
+    val builder = FetchErrorDetailsResponse.Error
+      .newBuilder()
+      .setMessage(message)
+      .addAllErrorTypeHierarchy(classes.toImmutableArraySeq.asJava)
+
+    if (errorClass != null) {
+      builder.setSparkThrowable(
+        FetchErrorDetailsResponse.SparkThrowable
           .newBuilder()
-          .setMessage(message)
-          .addAllErrorTypeHierarchy(classes.toImmutableArraySeq.asJava)
-          .build()))
+          .setErrorClass(errorClass)

Review Comment:
   Thanks for letting me know. I left some comments in 
https://github.com/apache/spark/pull/44468#discussion_r1437558634



##########
connector/connect/common/src/main/scala/org/apache/spark/sql/connect/client/GrpcExceptionConverter.scala:
##########
@@ -367,14 +367,20 @@ private[client] object GrpcExceptionConverter {
     implicit val formats = DefaultFormats
     val classes =
       JsonMethods.parse(info.getMetadataOrDefault("classes", 
"[]")).extract[Array[String]]
-
-    errorsToThrowable(
-      0,
-      Seq(
-        FetchErrorDetailsResponse.Error
+    val errorClass = info.getMetadataOrDefault("errorClass", null)
+    val builder = FetchErrorDetailsResponse.Error
+      .newBuilder()
+      .setMessage(message)
+      .addAllErrorTypeHierarchy(classes.toImmutableArraySeq.asJava)
+
+    if (errorClass != null) {
+      builder.setSparkThrowable(
+        FetchErrorDetailsResponse.SparkThrowable
           .newBuilder()
-          .setMessage(message)
-          .addAllErrorTypeHierarchy(classes.toImmutableArraySeq.asJava)
-          .build()))
+          .setErrorClass(errorClass)

Review Comment:
   Thanks for letting me know! I left some comments in 
https://github.com/apache/spark/pull/44468#discussion_r1437558634



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