From 3cfc23ee8c801f834496cbe01da7437168cb2998 Mon Sep 17 00:00:00 2001
From: Parker Timmins <parker.timmins@elastic.co>
Date: Wed, 20 Aug 2025 17:01:02 -0500
Subject: [PATCH] FieldType for random tests should return null for custom type

---
 .../main/java/org/elasticsearch/datageneration/FieldType.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/framework/src/main/java/org/elasticsearch/datageneration/FieldType.java b/test/framework/src/main/java/org/elasticsearch/datageneration/FieldType.java
index 94cd0b05f57df..ec53e3e68d4b2 100644
--- a/test/framework/src/main/java/org/elasticsearch/datageneration/FieldType.java
+++ b/test/framework/src/main/java/org/elasticsearch/datageneration/FieldType.java
@@ -108,7 +108,8 @@ public static FieldType tryParse(String name) {
             case "wildcard" -> FieldType.WILDCARD;
             case "passthrough" -> FieldType.PASSTHROUGH;
             case "match_only_text" -> FieldType.MATCH_ONLY_TEXT;
-            default -> throw new IllegalArgumentException("Unknown field type: " + name);
+            // Custom types will fail to parse and will return null
+            default -> null;
         };
     }