HADOOP-7695. RPC.stopProxy can throw unintended exception while logging error (atm)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1179512 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -54,6 +54,9 @@ Trunk (unreleased changes)
     HADOOP-7704. Reduce number of object created by JMXJsonServlet.
     (Devaraj K via Eric Yang)
 
+    HADOOP-7695. RPC.stopProxy can throw unintended exception while logging
+                 error (atm)
+
 Release 0.23.0 - Unreleased
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java

@@ -489,7 +489,8 @@ public static void stopProxy(Object proxy) {
       }
     } else {
       LOG.error("Could not get invocation handler " + invocationHandler +
-          " for proxy " + proxy + ", or invocation handler is not closeable.");
+          " for proxy class " + (proxy == null ? null : proxy.getClass()) +
+          ", or invocation handler is not closeable.");
     }
   }