We started to see strange error where google contacts gdata lib (Java) failed to parse the response coming from google (accessing google contacts feed).
The error on extended property :
com.google.gdata.util.ParseException: [Line 1, Column 10833, element gd:extendedProperty] exactly one of g:extendedProperty/@value, XML is required
Or
com.google.gdata.util.ParseException: [Line 2, Column 3234, element gd:email] g:email/@address is required.
In the exception of g:extendedProperty, seems (after sniffing) that extended property in the xml looks :
< gd:extendedProperty name='google_apps_sync'/ >
missing value, there's only name.
When we asked customer to contact google support (this is customer's contacts) google support suggested them to reinstall our app (very strange, we're a cloud service), we suggested to the customer to delete this problematic contact (found in sniffing) and re-create it again and this helped.
Looks like google is doing something with contacts and this caused them to respond with incorrect data (this maybe also related to Google contacts gdata (Java) fails on No parser for content type:application-xml[application/xml])
And also looks like google support not really knows what to do and suggest very strange solutions.
Googlers , please advise. Thanks
