We started to see this same behavior at the end of last week, more these 
last few days.

We use the Google AdWords API Java client library. We had no changes in our 
software.
The issues are random, sometimes they fail and sometimes they succeed.

Last time we saw this issue was yesterday. Today everything seems to be 
back to normal.

Best,
Igor


On Friday, 26 April 2019 17:21:10 UTC+2, Charlie Flowers wrote:
>
> I am also experiencing the same issue, using the Java client library. I 
> have been successfully accessing the Ads API to pull reports for multiple 
> client customers via the 'search' endpoint for the last month or so. 
> Starting this morning intermittent 'UNAUTHENTICATED' errors began occurring 
> unpredictably. By unpredictably, I mean:
>
> -API requests using the same immutable Credentials object succeed both 
> prior to and subsequent to the error.
> -If a failed API request is repeated, it may succeed or may fail again.
>
> These errors seem to occur on roughly 10% of API requests. Example:
>
> 19/04/26 10:51:19 WARN summary: FAILURE REQUEST SUMMARY. Method: google.
> ads.googleads.v1.services.GoogleAdsService/Search, Endpoint: googleads.
> googleapis.com:443, CustomerID: xxxxxxxxx, RequestID: dVfS-
> CY45L7gCmsbebvunw, ResponseCode: UNAUTHENTICATED, Fault: Request is 
> missing required authentication credential. Expected OAuth 2 access token, 
> login cookie or other valid authentication credential. See https://
> developers.google.com/identity/sign-in/web/devconsole-project..
>
> 19/04/26 10:51:19 WARN AdWordsLogIngestion: Exception checking status for 
> customer xxxxxxxxx
>
> com.google.ads.googleads.v1.errors.GoogleAdsException: errors {
>
>  error_code {
>
>    authentication_error: AUTHENTICATION_ERROR
>
>  }
>
>  message: "Authentication of the request failed."
>
> }
>
>
>         at com.google.ads.googleads.v1.errors.GoogleAdsException$Factory.
> createException(GoogleAdsException.java:42)
>
>    at com.google.ads.googleads.v1.errors.GoogleAdsException$Factory.
> createException(GoogleAdsException.java:34)
>
>
> Again, we have not had any issues accessing the API until this morning. No 
> code or environment changes on our end. Please let me know if you need any 
> more info.
>
>
> On Friday, April 26, 2019 at 4:06:55 AM UTC-4, mspier...@bol.com wrote:
>>
>> Hi,
>>
>> We get a lot of authentication errors recently for our api calls. After 
>> some retries they sometime work sometimes not:
>>
>> status = StatusCode.UNAUTHENTICATEDy
>> details = "Request is missing required authentication credential. 
>> Expected OAuth 2 access token, login cookie or other valid authentication 
>> credential. See 
>> https://developers.google.com/identity/sign-in/web/devconsole-project.";
>>
>> We use the python client with a google-ads.yml file. 
>> This worked without any problems until now.
>> Is there a problem with the api currently?
>>
>>
>> Regards,
>>
>> Manuel
>>
>

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