Fix CI.

.github/workflows/precommit.yml

@@ -5,7 +5,7 @@ permissions: read-all
 
 jobs:
   Run_UT:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
@@ -14,7 +14,7 @@ jobs:
           python3 -m unittest discover -p "*_test.py" ./
 
   Build_Wheel:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
@@ -28,7 +28,7 @@ jobs:
           path: ${{ github.workspace }}/**/*.whl
 
   Run_Docker_Tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 

src/utils/sender.py

@@ -55,10 +55,9 @@ def force_shutdown(self, timeout: float):
                 need_sleep = True
         if need_sleep:
             sleep(timeout)
-        self.executor.shutdown(wait=False)
+        self.executor.shutdown(wait=False, cancel_futures=True)
 
         try:
             self.executor._threads.clear()
-            futures.thread._threads_queues.clear()
         except Exception as err:
             pass  # nosec