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POApplicationError2 and ApplicationError5 when communicating with external api from AppEngine
 

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    <p>I have built an application on google app engine, in python27 to connect with another services API and in general everything works smoothly. Every now and then I get one of the following two errors</p> <pre><code>(&lt;class 'google.appengine.api.remote_socket._remote_socket.error'&gt;, error('An error occured while connecting to the server: ApplicationError: 2 ',), &lt;traceback object at 0x11949c10&gt;) (&lt;class 'httplib.HTTPException'&gt;, HTTPException('ApplicationError: 5 ',), &lt;traceback object at 0x113a5850&gt;) </code></pre> <p>The first of these errors (ApplicationError: 2) I interpret to be an error occurring on the part of the servers with which I am communicating, however I've not been able to find any detail on this and if there is any way I am responsible / can fix it.</p> <p>The second of these errors (ApplicationError: 5) I've found some detail on and it suggests that the server took too long to communicate with my application - however I've set the timeout to be 20s and it fails considerably quicker than that.</p> <p>If anyone could offer links or insight into the errors - specifically what causes the error and what can be done to fix it I'd very much appreciate it.</p>
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    1. COThe other end of the connection might have closed the connection or something like that.
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    2. COCan you share some code and a public URL to reproduce this issue?
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    3. COThe calls are buried in quite a lot of unpublishable code and it'll be quite a job to "clean". I really was after some ideas as to why this may be occurring - common causes for the error and to see whether there were any easy wins to overcome the errors.
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