Normally it worked fine. But for particular data it has a huge response that was truncated.
The size returned in a few attempts in IE browser was 2196456, in Chrome slightly different 2195397.
After a search in google I found http://forums.asp.net/post/4948029.aspx, that has a number of suggestions.
For WCF service that will transfer large amount of data in operations, here are the configuration settings you need to check:
1) the maxReceivedMessageSize attribute of the certain <binding> element(in your case, that's the webHttpbinding)
#<webHttpBinding> http://msdn.microsoft.com/en-us/library/bb412176.aspx
2) The <readerQuotas> settings (under the <binding> elements) which has control over the maxarrayLength, maxStringLength ,etc...
#<readerQuotas> http://msdn.microsoft.com/en-us/library/ms731325.aspx
3) The DataContractSerializer behavior which has a MaxItemsInObjectGraph property. You can configure it via ServiceBehavior of your WCF service
#DataContractSerializer.MaxItemsInObjectGraph Property http://msdn.microsoft.com/en-us/library/system.runtime.serialization.datacontractserializer.maxitemsinobjectgraph.aspx
4) And if your WCF service is hosted in ASP.NET/IIS web application, you also need to enlarge the "maxRequestLength" attribute of the <httpRuntime> element (under <system.web> section).
#httpRuntime Element (ASP.NET Settings Schema) http://msdn.microsoft.com/en-us/library/e1f13641.aspx
After a few attempts my collegue found that our problem was caused by