We have a cron that constantly reads data from AdWords (~every few minutes) and loads it into our DWH. Everything worked perfectly up until the last 24 hours in which we started to get ERROR_GETTING_RESPONSE_FROM_BACKEND errors intermittently. It fails every few hours.
The report configuration is the same for successful and failed requests, so I can't really reproduce it.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns2:selector>
<ns2:fields>CreativeId</ns2:fields>
<ns2:fields>AdGroupId</ns2:fields>
<ns2:fields>AdFormat</ns2:fields>
<ns2:fields>CampaignId</ns2:fields>
<ns2:fields>CityCriteriaId</ns2:fields>
<ns2:fields>ClickType</ns2:fields>
<ns2:fields>CountryCriteriaId</ns2:fields>
<ns2:fields>Date</ns2:fields>
<ns2:fields>Device</ns2:fields>
<ns2:fields>GclId</ns2:fields>
<ns2:fields>CriteriaParameters</ns2:fields>
<ns2:fields>CriteriaId</ns2:fields>
<ns2:fields>MetroCriteriaId</ns2:fields>
<ns2:fields>MonthOfYear</ns2:fields>
<ns2:fields>AdNetworkType1</ns2:fields>
<ns2:fields>AdNetworkType2</ns2:fields>
<ns2:fields>Page</ns2:fields>
<ns2:fields>RegionCriteriaId</ns2:fields>
<ns2:fields>Slot</ns2:fields>
<ns2:fields>UserListId</ns2:fields>
<ns2:dateRange>
<ns2:max>20150720</ns2:max>
</ns2:dateRange>
</ns2:selector>
<ns2:reportName>xplenty-report</ns2:reportName>
<ns2:reportType>CLICK_PERFORMANCE_REPORT</ns2:reportType>
<ns2:dateRangeType>TODAY</ns2:dateRangeType>
<ns2:downloadFormat>CSV</ns2:downloadFormat>
</reportDefinition>