From 4be03e9bebdbb52379e3e227e82e396327898d5b Mon Sep 17 00:00:00 2001
From: Niels Bauman <33722607+nielsbauman@users.noreply.github.com>
Date: Tue, 14 May 2024 17:28:36 +0200
Subject: [PATCH] Fix DataStream mutation in test (#108622)

Fixes #108620
---
 .../org/elasticsearch/cluster/metadata/DataStreamTests.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java b/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java
index 87fe732d156c..5a5d5f46de41 100644
--- a/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java
+++ b/server/src/test/java/org/elasticsearch/cluster/metadata/DataStreamTests.java
@@ -145,7 +145,7 @@ protected DataStream mutateInstance(DataStream instance) {
                 if (randomBoolean() || autoShardingEvent == null) {
                     // If we're mutating the auto sharding event of the failure store, we need to ensure there's at least one failure index.
                     if (failureIndices.isEmpty()) {
-                        failureIndices = DataStreamTestHelper.randomIndexInstances();
+                        failureIndices = DataStreamTestHelper.randomNonEmptyIndexInstances();
                         failureStore = true;
                     }
                     autoShardingEvent = new DataStreamAutoShardingEvent(