diff --git a/pulsar-common/src/main/java/org/apache/pulsar/client/impl/schema/SchemaUtils.java b/pulsar-common/src/main/java/org/apache/pulsar/client/impl/schema/SchemaUtils.java
index 9843e638a7d62..9747fb8cae662 100644
--- a/pulsar-common/src/main/java/org/apache/pulsar/client/impl/schema/SchemaUtils.java
+++ b/pulsar-common/src/main/java/org/apache/pulsar/client/impl/schema/SchemaUtils.java
@@ -301,8 +301,7 @@ public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContex
     }
 
     public static JsonObject toJsonObject(String json) {
-        JsonParser parser = new JsonParser();
-        return parser.parse(json).getAsJsonObject();
+        return JsonParser.parseString(json).getAsJsonObject();
     }
 
     private static class SchemaInfoToStringAdapter implements JsonSerializer<SchemaInfo> {
diff --git a/pulsar-functions/localrun/src/main/java/org/apache/pulsar/functions/LocalRunner.java b/pulsar-functions/localrun/src/main/java/org/apache/pulsar/functions/LocalRunner.java
index d672b4bc2d2eb..651523e72dd23 100644
--- a/pulsar-functions/localrun/src/main/java/org/apache/pulsar/functions/LocalRunner.java
+++ b/pulsar-functions/localrun/src/main/java/org/apache/pulsar/functions/LocalRunner.java
@@ -547,7 +547,7 @@ public void run() {
                     for (index = 0; index < futures.length; ++index) {
                         String json = futures[index].get();
                         Gson gson = new GsonBuilder().setPrettyPrinting().create();
-                        log.info(gson.toJson(new JsonParser().parse(json)));
+                        log.info(gson.toJson(JsonParser.parseString(json)));
                     }
                 } catch (TimeoutException | InterruptedException | ExecutionException e) {
                     log.error("Could not get status from all local instances");
diff --git a/pulsar-proxy/src/test/java/org/apache/pulsar/proxy/server/ProxyAuthenticationTest.java b/pulsar-proxy/src/test/java/org/apache/pulsar/proxy/server/ProxyAuthenticationTest.java
index 550aad43c0224..2e74995ee1aa6 100644
--- a/pulsar-proxy/src/test/java/org/apache/pulsar/proxy/server/ProxyAuthenticationTest.java
+++ b/pulsar-proxy/src/test/java/org/apache/pulsar/proxy/server/ProxyAuthenticationTest.java
@@ -143,8 +143,7 @@ public String authenticate(AuthenticationDataSource authData) throws Authenticat
 				commandData = authData.getHttpHeader("BasicAuthentication");
 			}
 
-			JsonParser parser = new JsonParser();
-			JsonObject element = parser.parse(commandData).getAsJsonObject();
+			JsonObject element = JsonParser.parseString(commandData).getAsJsonObject();
 			long expiryTimeInMillis = Long.parseLong(element.get("expiryTime").getAsString());
 			long currentTimeInMillis = System.currentTimeMillis();
 			if (expiryTimeInMillis < currentTimeInMillis) {