From df2923ced4a82ef3cb43cef84c7eff760f61b059 Mon Sep 17 00:00:00 2001
From: javanna <cavannaluca@gmail.com>
Date: Thu, 24 Mar 2016 15:11:51 +0100
Subject: [PATCH] roles to become unmodifiableSet

---
 .../main/java/org/elasticsearch/cluster/node/DiscoveryNode.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/elasticsearch/cluster/node/DiscoveryNode.java b/core/src/main/java/org/elasticsearch/cluster/node/DiscoveryNode.java
index fe582480ae0..3a9dc8462d1 100644
--- a/core/src/main/java/org/elasticsearch/cluster/node/DiscoveryNode.java
+++ b/core/src/main/java/org/elasticsearch/cluster/node/DiscoveryNode.java
@@ -234,7 +234,7 @@ public class DiscoveryNode implements Writeable<DiscoveryNode>, ToXContent {
                 roles.add(role);
             }
         }
-        return roles;
+        return Collections.unmodifiableSet(roles);
     }
 
     /**