diff --git a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/MessageKeyHash.java b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/MessageKeyHash.java
index bbac99e4b961d..3ad092d848a62 100644
--- a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/MessageKeyHash.java
+++ b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/MessageKeyHash.java
@@ -62,7 +62,7 @@ public Hash getHash() {
     };
 
     private final String name;
-    private final InlineElement desc;
+    private final transient InlineElement desc;
 
     MessageKeyHash(String name, InlineElement desc) {
         this.name = name;
diff --git a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/TopicRoutingMode.java b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/TopicRoutingMode.java
index c3274354f6c28..f251f8f760f20 100644
--- a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/TopicRoutingMode.java
+++ b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/router/TopicRoutingMode.java
@@ -67,7 +67,7 @@ public enum TopicRoutingMode implements DescribedEnum {
                     code(TopicRouter.class.getSimpleName())));
 
     private final String name;
-    private final InlineElement desc;
+    private final transient InlineElement desc;
 
     TopicRoutingMode(String name, InlineElement desc) {
         this.name = name;
diff --git a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/source/config/CursorVerification.java b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/source/config/CursorVerification.java
index fc70bdd3a5786..d604cebe6f525 100644
--- a/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/source/config/CursorVerification.java
+++ b/flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/source/config/CursorVerification.java
@@ -35,7 +35,7 @@ public enum CursorVerification implements DescribedEnum {
     /** Print a warn message and start consuming from the valid offset. */
     WARN_ON_MISMATCH(text("Print a warn message and start consuming from the valid offset."));
 
-    private final InlineElement desc;
+    private final transient InlineElement desc;
 
     CursorVerification(InlineElement desc) {
         this.desc = desc;