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Editorial Team
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Asked: 2026-06-12T16:38:34+00:00

I’ve been helplessly observing this problem for a couple months now, and have decided

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I’ve been helplessly observing this problem for a couple months now, and have decided this is my best shot.

I’m not sure what the cause of the problem is, but I can list some of the things I’m doing. I have an iOS app that uses AFNetworking to connect to a remote server hosted by Google App Engine using HTTP POST requests.

Now, everything works great, but sometimes, very very sporadically and random, I get failed requests. The activity indicator spins and spins for about a minute, and I get no feedback at the end – just a failed request. I check my server logs, and I don’t see any errors. After the failed request, I try again, and it works fine. It works fine for the whole day. And then another time randomly the issue repeats itself, sometimes spinning for 10 seconds with a fail, or a minute.

Generally, what can possibly be the cause of this? Is it normal to have some failed connections randomly? Is that something on my part?

But the weird thing is, is that while on my iPhone the app is running, and the indicator is spinning, and it’s trying to connect, I try connecting on the iOS simulator, and the connection works just fine. I try again on the iPhone, and it doesn’t work.

If I close the app completely and start again, then it works again. So it sounds like it may be a software issue rather than connection issue, but then again I have no evidence or data what so ever.

I know it’s vague, but I’m hoping someone may have had a similar problem. Anything helps.

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1 Answer

  1. Editorial Team

    There is a known issue with instance start on GAE for Java. You can star http://code.google.com/p/googleappengine/issues/detail?id=7706 issue.

    The same problem was reported for Python but it is not such a big problem.

    I think you should check logging level you use on appengine and monitor all your calls. Instance start usually takes more time, so you will be able to see how much time do you use on start and is it really a timeout problem.

    For Java version you could try to change log level to debug:

    .level = DEBUG

    in your logging.properties file. It will give you more information about instance start process.

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