From 6facb3f7c6d0017141c8e5d82c9e1187a81a1dd2 Mon Sep 17 00:00:00 2001
From: Wei-Chiu Chuang <weichiu@apache.org>
Date: Thu, 1 Aug 2019 15:50:43 -0700
Subject: [PATCH] HADOOP-12282. Connection thread's name should be updated
 after address changing is detected. Contributed by Lisheng Sun.

(cherry picked from commit b94eba9f11af66b10638dd255c224e946d842b8c)
---
 .../src/main/java/org/apache/hadoop/ipc/Client.java           | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
index 4ea1f4197cd..d013f767529 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
@@ -644,6 +644,10 @@ private synchronized boolean updateAddress() throws IOException {
         LOG.warn("Address change detected. Old: " + server.toString() +
                                  " New: " + currentAddr.toString());
         server = currentAddr;
+        UserGroupInformation ticket = remoteId.getTicket();
+        this.setName("IPC Client (" + socketFactory.hashCode()
+            + ") connection to " + server.toString() + " from "
+            + ((ticket == null) ? "an unknown user" : ticket.getUserName()));
         return true;
       }
       return false;