Improve error message.

1 files changed, 2 insertions, 1 deletions

diff --git a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexAttributeFieldsValidator.java b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexAttributeFieldsValidator.java
index 4cc8439566e..a6704481734 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexAttributeFieldsValidator.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexAttributeFieldsValidator.java
@@ -48,7 +48,8 @@ public class ComplexAttributeFieldsValidator extends Validator {
         if (!unsupportedFields.isEmpty()) {
             throw new IllegalArgumentException(
                     String.format("For cluster '%s', search '%s': The following complex fields do not support using struct field attributes: %s. " +
-                                  "Only supported for the following complex field types: array or map of struct with primitive types, map of primitive types",
+                                  "Only supported for the following complex field types: array or map of struct with primitive types, map of primitive types. " +
+                                  "The supported primitive types are: byte, int, long, float, double and string",
                             clusterName, search.getName(), unsupportedFields));
         }
     }