callback event serial

src/core/callcenter/acd.py

@@ -61,6 +61,9 @@ class AcdService:
         all_task = []
         for k, v in self.holdsQueue.items():
             self.logger.info("AcdService tryTransferAgent start, queue.k:%s, queue.v:%s", k, v.qsize())
+            if v.qsize() <= 0:
+                self.holdsQueue.pop(k, None)
+                continue
             all_task.append(self.pool.submit(self.holds_one_queue, k, v))
         wait(all_task, timeout=6, return_when=ALL_COMPLETED)