From b94eba9f11af66b10638dd255c224e946d842b8c 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.

---
 .../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 3afa6d80b8..358c0d7ac3 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
@@ -638,6 +638,10 @@ public class Client implements AutoCloseable {
         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;