From aa26b716a88006a45f520394aab841875d26b3e7 Mon Sep 17 00:00:00 2001
From: charles <redcreen@gmail.com>
Date: Wed, 27 Nov 2013 16:34:51 +0800
Subject: [PATCH] Update ConnectionSet.java

if hashCode equals Integer.MIN_VALUE, may cause NPE .
---
 src/core/org/apache/hadoop/ipc/ConnectionSet.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/core/org/apache/hadoop/ipc/ConnectionSet.java b/src/core/org/apache/hadoop/ipc/ConnectionSet.java
index 6bfae917..be2a1d1c 100644
--- a/src/core/org/apache/hadoop/ipc/ConnectionSet.java
+++ b/src/core/org/apache/hadoop/ipc/ConnectionSet.java
@@ -125,7 +125,12 @@ int getBucketIndexFromConnection(Connection c) {
     if (c == null || (connString = c.toString()) == null) {
       return 0;
     }
-    int hashCode = Math.abs(connString.hashCode());
+    int hashCode = connString.hashCode();
+    if (hashCode == Integer.MIN_VALUE) {
+      hashCode = Integer.MAX_VALUE;
+    } else {
+      hashCode = Math.abs(hashCode);
+    }
     return hashCode % numBuckets;
   }