diff --git a/README.md b/README.md
index 2454e0a4f1..f419f8d501 100644
--- a/README.md
+++ b/README.md
@@ -196,6 +196,9 @@ rss-xxx.tgz will be generated for deployment
 2. Update Spark conf to enable Uniffle, e.g.,
 
    ```
+   # Uniffle transmits serialized shuffle data over network, therefore a serializer that supports relocation of
+   # serialized object should be used. 
+   spark.serialier org.apache.spark.serializer.KryoSerializer # this could also be in the spark-defaults.conf
    spark.shuffle.manager org.apache.spark.shuffle.RssShuffleManager
    spark.rss.coordinator.quorum <coordinatorIp1>:19999,<coordinatorIp2>:19999
    # Note: For Spark2, spark.sql.adaptive.enabled should be false because Spark2 doesn't support AQE.
diff --git a/client-spark/spark3/src/main/java/org/apache/spark/shuffle/RssShuffleManager.java b/client-spark/spark3/src/main/java/org/apache/spark/shuffle/RssShuffleManager.java
index cabccb3b6f..0c1bcc6968 100644
--- a/client-spark/spark3/src/main/java/org/apache/spark/shuffle/RssShuffleManager.java
+++ b/client-spark/spark3/src/main/java/org/apache/spark/shuffle/RssShuffleManager.java
@@ -20,6 +20,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
@@ -152,6 +153,13 @@ private synchronized void putBlockId(
 
   public RssShuffleManager(SparkConf conf, boolean isDriver) {
     this.sparkConf = conf;
+    boolean supportsRelocation = Optional.ofNullable(SparkEnv.get())
+        .map(env -> env.serializer().supportsRelocationOfSerializedObjects())
+        .orElse(true);
+    if (!supportsRelocation) {
+      LOG.warn("RSSShuffleManager requires a serializer which supports relocations of serialized object. Please set "
+          + "spark.serializer to org.apache.spark.serializer.KryoSerializer instead");
+    }
     this.user = sparkConf.get("spark.rss.quota.user", "user");
     this.uuid = sparkConf.get("spark.rss.quota.uuid",  Long.toString(System.currentTimeMillis()));
     // set & check replica config
diff --git a/docs/client_guide.md b/docs/client_guide.md
index c2884fa0e2..12c99c9175 100644
--- a/docs/client_guide.md
+++ b/docs/client_guide.md
@@ -38,6 +38,9 @@ This document will introduce how to deploy Uniffle client plugins with Spark and
 2. Update Spark conf to enable Uniffle, eg,
 
    ```
+   # Uniffle transmits serialized shuffle data over network, therefore a serializer that supports relocation of
+   # serialized object should be used. 
+   spark.serialier org.apache.spark.serializer.KryoSerializer # this could also be in the spark-defaults.conf
    spark.shuffle.manager org.apache.spark.shuffle.RssShuffleManager
    spark.rss.coordinator.quorum <coordinatorIp1>:19999,<coordinatorIp2>:19999
    # Note: For Spark2, spark.sql.adaptive.enabled should be false because Spark2 doesn't support AQE.