CODEWITHSUNDEEP
google-app-enginecronhandler
gruszczy
gruszczy

Reputation: 42188

Google App Engine: Cron handler is called by cron, but no code is run

I have a following problem. I have defined a cron job in Google App Engine, but my get method is not called (or to be precise it is called every other time - if I run it manually it doesn't do anything at the first time, but at the second it works flawlessly). This is output from logging for the call made by cron:

2011-07-04 11:39:08.500 /suggestions/ 200 489ms 70cpu_ms 0kb AppEngine-Google; (+http://code.google.com/appengine)
0.1.0.1 - - [04/Jul/2011:11:39:08 -0700] "GET /suggestions/ HTTP/1.1" 200 0 - "AppEngine-Google; (+http://code.google.com/appengine)" "bazinga-match.appspot.com" ms=489 cpu_ms=70 api_cpu_ms=0 cpm_usd=0.001975 queue_name=__cron task_name=a449e27ff383de24ff8fc5d5f05f2aae

As you can see it makes GET request on /suggestions/, but nothing happens, including my log messages (they are printed, when I run it second time manually). Do you have any idea, why this might be happening?

My handler:

class SuggestionsHandler(RequestHandler):

    def get(self):
        logging.debug('Creating suggestions')
        for key in db.Query(User, keys_only=True).order('last_suggestion'):
            make_suggestion(key)
        logging.debug('Done creating suggestions')
        print
        print('Done creating suggestions')

This is my cron.yaml:

cron:
- description: daily suggestion creation
  url: /suggestions/
  schedule: every 6 hours

and proper section of my app.yaml:

- url: /suggestions/
    script: cron.py
    login: admin

Upvotes: 3

Views: 855

Answers (1)

Nick Johnson
Nick Johnson

Reputation: 101149

You're missing this declaration from the bottom of your handler file, after main:

if __name__ == '__main__':
  main()

The first time a handler script is run, App Engine simply imports it, and this snippet runs your main in that situation. On subsequent requests, App Engine runs the main function, if you defined one.

Upvotes: 4

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