diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
index 70b0bd733c2..21afd8f6e97 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
@@ -927,7 +927,7 @@ public void messageReceived(ChannelHandlerContext ctx, MessageEvent evt)
       // to turn it on please enable this audit log
       // on log4j.properties by uncommenting the setting
       if (AUDITLOG.isDebugEnabled()) {
-        AUDITLOG.debug("shuffle for " + jobQ.get(0) +
+        AUDITLOG.debug("shuffle for " + jobQ.get(0) + " mappers: " + mapIds +
                          " reducer " + reduceQ.get(0));
       }
       int reduceId;