updates to log exceptions during threadpool, avoid errors when hwaddr is None during EMANE scenarios

daemon/core/nodes/interface.py

@@ -153,6 +153,7 @@ class CoreInterface:
         :param str addr: hardware address to set to.
         :return: nothing
         """
+        if addr is not None:
             addr = utils.validate_mac(addr)
         self.hwaddr = addr
 

daemon/core/utils.py

@@ -440,6 +440,7 @@ def threadpool(
                 result = future.result()
                 results.append(result)
             except Exception as e:
+                logging.exception("thread pool exception")
                 exceptions.append(e)
     return results, exceptions