问题
GAE seems to throw an ApplicationError: 1 on some code that has worked before. It could be a general GEA problem or some version upgrade issue as the code last was used a while ago. How would I debug that error?
ApplicationError: 1 (/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py:1552)
Traceback (most recent call last):
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__
rv = self.handle_exception(request, response, e)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__
rv = self.router.dispatch(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
return route.handler_adapter(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
return handler.dispatch()
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File "/base/data/home/apps/e~(AppId)/dev.(VersionId)/worker.py", line 732, in post
channel.send_message('status-' + userId, str(emailCount) + ":" + str(emailTotal))
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/channel/channel.py", line 242, in send_message
raise _ToChannelError(e)
ApplicationError: ApplicationError: 1
回答1:
The Channels API has been shutdown; the decprecation page is here.
It states:
The Channel API did not scale well enough for the workloads it was intended for and so did not find wide adoption. Accordingly, support for the Channel API will be shut down for brief periods of time for maintenance beginning on July 13, 2017, as described in the shutdown timetable. The service will be turned off permanently on October 31, 2017.
The recommended alternative is to use Firebase:
See Using Firebase for realtime events on App Engine for information on replacing Channel API functionality with the Firebase Realtime Database.
来源：https://stackoverflow.com/questions/47400348/gae-channel-api-applicationerror-1