问题
I am using google cloud sql with appengine.
I am getting com.google.apphosting.api.ApiProxy$RequestTooLargeException: The request to API call datastore_v3.Put() was too large. despite I am not using the Datasotre API.
I think according to the docs https://developers.google.com/appengine/docs/java/cloud-sql/developers-guide#access_limits that the data-size limit is 16MB served in 60 seconds.
My data size is around 1 MB and my response is definitely less than 1 minute. If I try with smaller data, everything works correctly.
So, why is the exception thrown ? what is the problem ? Is it a bug in google app engine? or is there a size-limitation , where is it documented ? or what ?
回答1:
This happens because of GAE sessions, which under the hood use GAE Datastore to save session objects. This exception is thrown if more than 1Mb data is stored in session.
来源：https://stackoverflow.com/questions/15338092/the-request-to-api-call-datastore-v3-put-was-too-large