From fcd5c85c34af1de22b07e81abbe109fbf95df891 Mon Sep 17 00:00:00 2001
From: Keith Massey <keith.massey@elastic.co>
Date: Mon, 23 Dec 2024 16:03:49 -0600
Subject: [PATCH] updating for older java

---
 .../elasticsearch/action/bulk/TransportSimulateBulkAction.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/main/java/org/elasticsearch/action/bulk/TransportSimulateBulkAction.java b/server/src/main/java/org/elasticsearch/action/bulk/TransportSimulateBulkAction.java
index 8233d4b334929..cb43e07faa612 100644
--- a/server/src/main/java/org/elasticsearch/action/bulk/TransportSimulateBulkAction.java
+++ b/server/src/main/java/org/elasticsearch/action/bulk/TransportSimulateBulkAction.java
@@ -379,7 +379,7 @@ private Collection<String> validateUpdatedMappings(
             List<LuceneDocument> luceneDocuments = result.parsedDoc().docs();
             assert luceneDocuments == null || luceneDocuments.size() == 1 : "Expected a single lucene document from index attempt";
             if (luceneDocuments != null && luceneDocuments.size() == 1) {
-                ignoredFields = luceneDocuments.getFirst()
+                ignoredFields = luceneDocuments.get(0)
                     .getFields()
                     .stream()
                     .filter(field -> field.name().equals(IgnoredFieldMapper.NAME) && field instanceof StringField)