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I am trying to import existing mail content to a google group through apps.groups.migration API. The code is in C++ and the protolol is nakid HTTP. The program fails with HTTP error 500.

Following is the error response contents and header. What is wrong ?

{
 "error": {
  "errors": [

{ "domain": "global", "reason": "backendError", "message": "Backend Error" } ], "code": 500, "message": "Backend Error" } }

Alternate-Protocol: 443:quic Content-Length: 177 Content-Type: application/json Date: Thu, 02 Jan 2014 06:50:10 GMT Server: HTTP Upload Server Built on Dec 11 2013 18:21:10 (1386814870)

YANO Takashi
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  • I quoted the HTTP request with Sleep(1000)s and add 10 times retry but the error 500 still occurs. The error is 500, not 503. – YANO Takashi Jan 04 '14 at 22:28
  • I am trying to put data into Google Groups, not Google Groups for Business. Is it the reason of error 500 ? The reason why I am using Nakid HTTP is: I am using Windows, not Linux or MacOS. The code base is from my working applications with Google Calendar API or Google Tasks API. – YANO Takashi Jan 04 '14 at 22:30

1 Answers1

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Backend Errors are a normal part of working with Google APIs and generally indicate that your application is sending data to Google to fast and needs to backoff some. See the details in the Group Migration API Limits document. Further details about implementing exponential backoff are offered in the Drive API docs.

You may want to take a look at the Google APIs Client Library for C++ rather than reinventing the wheel for these interactions.

Jay Lee
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