From d4888db87ea875d8f6a76a3b50ff2ddfedbb1da8 Mon Sep 17 00:00:00 2001
From: David Turner <david.turner@elastic.co>
Date: Tue, 7 May 2019 16:24:07 +0100
Subject: [PATCH] Add comment about unexpected versions

---
 .../src/test/java/org/elasticsearch/env/NodeMetaDataTests.java  | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/server/src/test/java/org/elasticsearch/env/NodeMetaDataTests.java b/server/src/test/java/org/elasticsearch/env/NodeMetaDataTests.java
index db6d8f287f56d..1328a1b8b10a3 100644
--- a/server/src/test/java/org/elasticsearch/env/NodeMetaDataTests.java
+++ b/server/src/test/java/org/elasticsearch/env/NodeMetaDataTests.java
@@ -38,6 +38,8 @@
 
 public class NodeMetaDataTests extends ESTestCase {
     private Version randomVersion() {
+        // VersionUtils.randomVersion() only returns known versions, which are necessarily no later than Version.CURRENT; however we want
+        // also to consider our behaviour with all versions, so occasionally pick up a truly random version.
         return rarely() ? Version.fromId(randomInt()) : VersionUtils.randomVersion(random());
     }