Google App Engine MemcacheException

google.appengine.api.memcache.MemcacheServiceException: Memcache put: Set failed to set 1 keys: [B@1c09b65 facing this exception w开发者_如何学运维ithout using any memcache sevice in application.Has anybody faced this before? whats the reason?

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I cant recall seeing this before, but regarding your mention of not using the memcache service, I know that if you using ndb as imported below in python, App Engine automatically includes and utilizes memcache without any needed input/interaction/configuration on your part.

from google.appengine.ext import ndb