diff --git a/main/lib/idds/agents/carrier/poller.py b/main/lib/idds/agents/carrier/poller.py
index 40d6be3f..a2ab47e2 100644
--- a/main/lib/idds/agents/carrier/poller.py
+++ b/main/lib/idds/agents/carrier/poller.py
@@ -97,6 +97,15 @@ def __init__(self, num_threads=1, max_number_workers=3, poll_period=10, retries=
 
         self.show_queue_size_time = None
 
+        self.extra_executors = None
+
+    def get_extra_executors(self):
+        if self.enable_executors:
+            if self.extra_executors is None:
+                name = self.executor_name + "_Extra"
+                self.extra_executors = self.create_executors(name, max_workers=self.num_threads)
+        return self.extra_executors
+
     def is_ok_to_run_more_processings(self):
         if self.number_workers >= self.max_number_workers:
             return False
@@ -297,7 +306,7 @@ def handle_update_processing(self, processing):
             log_prefix = self.get_log_prefix(processing)
             executors = None
             if self.enable_executors:
-                executors = self.executors
+                executors = self.get_extra_executors()
 
             ret_handle_update_processing = handle_update_processing(processing,
                                                                     self.agent_attributes,
diff --git a/main/lib/idds/agents/carrier/submitter.py b/main/lib/idds/agents/carrier/submitter.py
index 4a21e3c1..83fde5cf 100644
--- a/main/lib/idds/agents/carrier/submitter.py
+++ b/main/lib/idds/agents/carrier/submitter.py
@@ -113,7 +113,8 @@ def handle_new_processing(self, processing):
             # work = transform['transform_metadata']['work']
             executors = None
             if self.enable_executors:
-                executors = self.executors
+                executors = self.get_extra_executors()
+
             ret_new_processing = handle_new_processing(processing,
                                                        self.agent_attributes,
                                                        func_site_to_cloud=self.get_site_to_cloud,
diff --git a/main/lib/idds/agents/carrier/trigger.py b/main/lib/idds/agents/carrier/trigger.py
index 0f19c551..6adbd37f 100644
--- a/main/lib/idds/agents/carrier/trigger.py
+++ b/main/lib/idds/agents/carrier/trigger.py
@@ -104,7 +104,7 @@ def handle_trigger_processing(self, processing, trigger_new_updates=False):
             log_prefix = self.get_log_prefix(processing)
             executors = None
             if self.enable_executors:
-                executors = self.executors
+                executors = self.get_extra_executors()
 
             ret_trigger_processing = handle_trigger_processing(processing,
                                                                self.agent_attributes,
diff --git a/main/lib/idds/agents/common/timerscheduler.py b/main/lib/idds/agents/common/timerscheduler.py
index b1fb654a..8bbd0cef 100644
--- a/main/lib/idds/agents/common/timerscheduler.py
+++ b/main/lib/idds/agents/common/timerscheduler.py
@@ -61,6 +61,7 @@ def __init__(self, num_threads, name=None, logger=None):
         if self.num_threads < 1:
             self.num_threads = 1
         self.graceful_stop = threading.Event()
+        self.executor_name = name
         self.executors = IDDSThreadPoolExecutor(max_workers=self.num_threads,
                                                 thread_name_prefix=name)
 
@@ -79,6 +80,10 @@ def set_logger(self, logger):
     def stop(self, signum=None, frame=None):
         self.graceful_stop.set()
 
+    def create_executors(self, name, max_workers=1):
+        executors = IDDSThreadPoolExecutor(max_workers=max_workers, thread_name_prefix=name)
+        return executors
+
     def create_task(self, task_func, task_output_queue=None, task_args=tuple(), task_kwargs={}, delay_time=10, priority=1):
         return TimerTask(task_func, task_output_queue, task_args, task_kwargs, delay_time, priority, self.logger)