From e21c5975f2a79bf178e8051b910ae43c14cc14d8 Mon Sep 17 00:00:00 2001
From: Martijn van Groningen <martijn.v.groningen@gmail.com>
Date: Mon, 4 Jul 2022 18:04:07 +0200
Subject: [PATCH] Use pre-parsed index mode when figuring out timestamp range
 (#88254)

Use `indexMode` field instead of parsing IndexMode from settings in
order to determine time series timestamp range. Parsing the index mode
isn't necessary, because we read the index mode when IndexMetadata is
constructed, and this just burns unnecessary CPU cycles.
---
 .../org/elasticsearch/cluster/metadata/IndexMetadata.java   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java b/server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java
index cd794aa4151f1..bc18e0b697a2c 100644
--- a/server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java
+++ b/server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java
@@ -1006,7 +1006,11 @@ public IndexLongFieldRange getTimestampRange() {
      */
     @Nullable
     public IndexLongFieldRange getTimeSeriesTimestampRange() {
-        return IndexSettings.MODE.get(settings).getConfiguredTimestampRange(this);
+        if (indexMode != null) {
+            return indexMode.getConfiguredTimestampRange(this);
+        } else {
+            return null;
+        }
     }
 
     @Override