From f5f4f5823bb5f3de9484987a849a0a73906732a6 Mon Sep 17 00:00:00 2001
From: fengyelei <fengyelei@huawei.com>
Date: Thu, 6 Apr 2017 20:31:27 +0800
Subject: [PATCH] [FLINK-6273] [core] don't convert hostname to lower cases to
 prevent akka connection failure

---
 flink-core/src/main/java/org/apache/flink/util/NetUtils.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flink-core/src/main/java/org/apache/flink/util/NetUtils.java b/flink-core/src/main/java/org/apache/flink/util/NetUtils.java
index d4437e41fdd95c..d05af257a36f33 100644
--- a/flink-core/src/main/java/org/apache/flink/util/NetUtils.java
+++ b/flink-core/src/main/java/org/apache/flink/util/NetUtils.java
@@ -130,7 +130,7 @@ public static String unresolvedHostToNormalizedString(String host) {
 		if (host == null) {
 			host = InetAddress.getLoopbackAddress().getHostAddress();
 		} else {
-			host = host.trim().toLowerCase();
+			host = host.trim();
 		}
 
 		// normalize and valid address