Merge pull request #345 from coreemu/bugfix/hwaddr-none

updates to log exceptions during threadpool, avoid errors when hwaddr…

daemon/core/nodes/interface.py

@@ -153,7 +153,8 @@ class CoreInterface:
         :param str addr: hardware address to set to.
         :return: nothing
         """
-        addr = utils.validate_mac(addr)
+        if addr is not None:
+            addr = utils.validate_mac(addr)
         self.hwaddr = addr
 
     def getparam(self, key: str) -> float:

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