chg: Catch aiohttp.ClientError

bgpranking/modulesfetcher.py

@@ -133,6 +133,7 @@ class Fetcher():
                 if not await self.__newer():
                     unset_running('{}-{}-{}'.format(self.__class__.__name__, self.vendor, self.listname))
                     return
+                try:
                     async with aiohttp.ClientSession() as session:
                         async with session.get(self.url) as r:
                             content = await r.content.read()
@@ -142,6 +143,8 @@ class Fetcher():
                             with (self.directory / '{}.txt'.format(datetime.now().isoformat())).open('wb') as f:
                                 f.write(content)
                             unset_running('{}-{}-{}'.format(self.__class__.__name__, self.vendor, self.listname))
+                except aiohttp.ClientError as e:
+                    self.logger.exception('Fetching the list failed: {}'.format(e))
         except PidFileError:
             self.logger.info('Fetcher already running')
         finally: