Intermittent “500 Server Error” on “/_ah/openid_verify” using AppEngine Federated / OpenID login

[Graeme Pyle]

I am getting this error about 20% of the time. I've dumped and compared traffic on successful and failed requests and there is no noticeable difference:

There's nothing in the AppEngine logs or dashboard, and also no way to catch exceptions on requests that hit "/_ah" URLs. I've attached a script that tries the login every 5 minutes, as well as the traffic dumps for successful and failed requests.

I would really appreciate it if someone from Google could take a look at this. The error definitely occurs deep in the bowls of the AppEngine OpenID implementation and there is no way for an outsider to see such errors.

Thanks, Graeme

[Graeme Pyle]

Please use this test script instead