From f819cd3d9ed6cac7304ea2ce6264f9270f55f05f Mon Sep 17 00:00:00 2001
From: Niveathika <niveathika@wso2.com>
Date: Tue, 3 Feb 2026 10:19:04 +0530
Subject: [PATCH 1/2] Add defaut value

---
 ballerina/listener_endpoint.bal | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ballerina/listener_endpoint.bal b/ballerina/listener_endpoint.bal
index 872352c77..91974d2a2 100644
--- a/ballerina/listener_endpoint.bal
+++ b/ballerina/listener_endpoint.bal
@@ -247,7 +247,7 @@ public type Service distinct service object {
 #                       It is recommended to use a unique name for each group.
 # + heartbeatFrequency - The interval (in seconds) for the node to update its heartbeat status. Default is 1 second.
 public type CoordinationConfig record {|
-    task:DatabaseConfig databaseConfig;
+    task:DatabaseConfig databaseConfig = <task:MysqlConfig>{};
     int livenessCheckInterval = 30;
     string memberId;
     string coordinationGroup;

From 68e44bce7890159fee5619501572a7b736911c5a Mon Sep 17 00:00:00 2001
From: Niveathika <niveathika@wso2.com>
Date: Tue, 3 Feb 2026 10:19:20 +0530
Subject: [PATCH 2/2] Improve member isolation

---
 ballerina/listener_endpoint.bal | 70 +++++++++++++++------------------
 1 file changed, 32 insertions(+), 38 deletions(-)

diff --git a/ballerina/listener_endpoint.bal b/ballerina/listener_endpoint.bal
index 91974d2a2..23eb3bf14 100644
--- a/ballerina/listener_endpoint.bal
+++ b/ballerina/listener_endpoint.bal
@@ -22,44 +22,42 @@ import ballerina/task;
 public isolated class Listener {
 
     private handle EMPTY_JAVA_STRING = java:fromString("");
-    private ListenerConfiguration config = {};
-    private task:Listener taskListener;
+    private final readonly & ListenerConfiguration config;
+    private final task:Listener taskListener;
 
     # Gets invoked during object initialization.
     #
     # + listenerConfig - Configurations for FTP listener
     # + return - `()` or else an `ftp:Error` upon failure to initialize the listener
     public isolated function init(*ListenerConfiguration listenerConfig) returns Error? {
-        self.config = listenerConfig.clone();
-
-        lock {
-            decimal pollingInterval = self.config.pollingInterval;
-            CoordinationConfig? coordination = self.config.coordination;
-
-            task:Listener|error taskListener;
-            if coordination is CoordinationConfig {
-                taskListener = new ({
-                    trigger: {interval: pollingInterval},
-                    warmBackupConfig: {
-                        databaseConfig: coordination.databaseConfig,
-                        livenessCheckInterval: coordination.livenessCheckInterval,
-                        taskId: coordination.memberId,
-                        groupId: coordination.coordinationGroup,
-                        heartbeatFrequency: coordination.heartbeatFrequency
-                    }
-                });
-            } else {
-                taskListener = new ({
-                    trigger: {interval: pollingInterval}
-                });
-            }
+        self.config = listenerConfig.cloneReadOnly();
+
+        decimal pollingInterval = self.config.pollingInterval;
+        CoordinationConfig? coordination = self.config.coordination;
+
+        task:Listener|error taskListener;
+        if coordination is CoordinationConfig {
+            taskListener = new ({
+                trigger: {interval: pollingInterval},
+                warmBackupConfig: {
+                    databaseConfig: coordination.databaseConfig,
+                    livenessCheckInterval: coordination.livenessCheckInterval,
+                    taskId: coordination.memberId,
+                    groupId: coordination.coordinationGroup,
+                    heartbeatFrequency: coordination.heartbeatFrequency
+                }
+            });
+        } else {
+            taskListener = new ({
+                trigger: {interval: pollingInterval}
+            });
+        }
 
-            if taskListener is error {
-                return error Error("Failed to create internal task listener: " + taskListener.message());
-            }
-            self.taskListener = taskListener;
-            return initListener(self, self.config);
+        if taskListener is error {
+            return error Error("Failed to create internal task listener: " + taskListener.message());
         }
+        self.taskListener = taskListener;
+        return initListener(self, self.config);
     }
 
     # Starts the FTP listener and begins monitoring for file changes.
@@ -119,17 +117,13 @@ public isolated class Listener {
     }
 
     isolated function internalStart() returns error? {
-        lock {
-            check self.taskListener.attach(getPollingService(self));
-            check self.taskListener.'start();
-        }
+        check self.taskListener.attach(getPollingService(self));
+        check self.taskListener.'start();
     }
 
     isolated function stop() returns error? {
-        lock {
-            check self.taskListener.gracefulStop();
-            return cleanup(self);
-        }
+        check self.taskListener.gracefulStop();
+        return cleanup(self);
     }
 
     # Polls the FTP server for new or deleted files.