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    <h1>Which kind of DeadlineExceededError?</h1> <p>There are three kinds of <code>DeadlineExceededError</code> in AppEngine.<br> <a href="https://developers.google.com/appengine/articles/deadlineexceedederrors" rel="nofollow">https://developers.google.com/appengine/articles/deadlineexceedederrors</a></p> <blockquote> <ol> <li>google.appengine.runtime.DeadlineExceededError: raised if the overall request times out, typically after 60 seconds, or 10 minutes for task queue requests.</li> <li>google.appengine.runtime.apiproxy_errors.DeadlineExceededError: raised if an RPC exceeded its deadline. This is typically 5 seconds, but it is settable for some APIs using the 'deadline' option.</li> <li>google.appengine.api.urlfetch_errors.DeadlineExceededError: raised if the URLFetch times out.</li> </ol> </blockquote> <p>As you can see. The 10mins limit of <code>taskqueue</code> only help the<code>google.appengine.runtime.DeadlineExceededError</code>. The type of <code>DeadlineExceededError</code> can be identified via traceback (list below). In this case, it is <code>google.appengine.runtime.apiproxy_errors.DeadlineExceededError</code>. Which will raise in 5secs by default. (I will update the post after figure out how to change it)</p> <h2>TYPE 1. google.appengine.runtime.DeadlineExceededError</h2> <p>The traceback looks like</p> <pre><code>Traceback (most recent call last): File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/runtime/wsgi.py", line 266, in Handle result = handler(dict(self._environ), self._StartResponse) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in __call__ rv = self.router.dispatch(request, response) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher return route.handler_adapter(request, response) File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1077, in __call__ return handler.dispatch() File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 545, in dispatch return method(*args, **kwargs) File "/base/data/home/apps/s~tagtooadex2/test.371204033771063679/index.py", line 9, in get pass DeadlineExceededError </code></pre> <h3>Solution</h3> <p>This exception can be solved by using taskqueue (10mins), backend or manual scaling options. <a href="https://developers.google.com/appengine/docs/python/modules/#Python_Instance_scaling_and_class" rel="nofollow">https://developers.google.com/appengine/docs/python/modules/#Python_Instance_scaling_and_class</a></p> <h2>TYPE 2. google.appengine.runtime.apiproxy_errors.DeadlineExceededError</h2> <p>The traceback looks like </p> <pre><code>DeadlineExceededError: The API call remote_socket.Receive() took too long to respond and was cancelled. </code></pre> <h2>TYPE 3. google.appengine.api.urlfetch_errors.DeadlineExceededError</h2> <p>The traceback looks like</p> <pre><code>DeadlineExceededError: Deadline exceeded while waiting for HTTP response from URL: http://www.sogi.com.tw/newforum/article_list.aspx?topic_ID=6089521 </code></pre> <h3>Solution:</h3> <p>This exception can be solved by extend the deadline.</p> <pre><code>urlfetch.fetch(url, deadline=10*60) </code></pre> <p><a href="https://developers.google.com/appengine/docs/python/urlfetch/fetchfunction" rel="nofollow">https://developers.google.com/appengine/docs/python/urlfetch/fetchfunction</a></p>
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    1. POHow do I increase the timeout for imaplib requests?
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    1. COIt's type 2. Problem is, there's no (documented) way to set the timeout for sockets. Actually, it's documented that sockets don't have timeouts by default. So I don't understand why some of my requests are timing out at exactly 60 seconds.
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    2. COA google guy said in fact the imap ports is blocked... I tried to access gmail account but received no IMAP4_SSL error. If your imap server is gmail, try: http://googleappengine.blogspot.tw/2011/05/accessing-gmail-accounts-from-app.html http://stackoverflow.com/questions/9476777/accessing-gmail-emails-through-google-app-engine
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