diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 6cc09c3e32c..44c2bda6bc3 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -143,6 +143,9 @@ Release 2.5.0 - UNRELEASED
     YARN-2091. Add more values to ContainerExitStatus and pass it from NM to
     RM and then to app masters (Tsuyoshi OZAWA via bikas)
 
+    YARN-2125. Changed ProportionalCapacityPreemptionPolicy to log CSV in debug
+    level. (Wangda Tan via jianhe)
+
   OPTIMIZATIONS
 
   BUG FIXES 
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/ProportionalCapacityPreemptionPolicy.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/ProportionalCapacityPreemptionPolicy.java
index 6d1516158b5..568c5abbc01 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/ProportionalCapacityPreemptionPolicy.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/ProportionalCapacityPreemptionPolicy.java
@@ -208,7 +208,9 @@ public class ProportionalCapacityPreemptionPolicy implements SchedulingEditPolic
     Map<ApplicationAttemptId,Set<RMContainer>> toPreempt =
         getContainersToPreempt(queues, clusterResources);
 
-    logToCSV(queues);
+    if (LOG.isDebugEnabled()) {
+      logToCSV(queues);
+    }
 
     // if we are in observeOnly mode return before any action is taken
     if (observeOnly) {
@@ -608,7 +610,7 @@ public class ProportionalCapacityPreemptionPolicy implements SchedulingEditPolic
       sb.append(", ");
       tq.appendLogString(sb);
     }
-    LOG.info(sb.toString());
+    LOG.debug(sb.toString());
   }
 
   /**