Scheduled maintenance on March 2,9 at 6pm PST

[App Engine Team]

On March 2nd and March 9th, App Engine will undergo maintenance at
6pm PST (GMT-8) for approximately 30 minutes for a hardware upgrade.

During this period all App Engine apps will revert to read-only mode,
and all datastore writes and transactions will throw an exception. If
you'd like to modify your app to catch this exception, here is the
exception:

exception
google.appengine.runtime.apiproxy_errors.CapabilityDisabledError

This will be thrown by db.Model.put(), db.Model.delete(), and
db.run_in_transaction(). You can use Python's try syntax to fail
gracefully on writes like this:

from google.appengine.ext import db
from google.appengine.runtime.apiproxy_errors import
CapabilityDisabledError

myModel = db.Model()
try:
myModel.put()
except CapabilityDisabledError:
# fail gracefully here
pass

The memcache API will also be disabled during this period. Calls to
memcache will not throw exceptions but will instead immediately return
False for set() calls and None for get() calls (just like any other
cache miss.) We've also implement a fix that should prevent the load
increase resulting from this memcache outage from affecting the
serving of your application.

Pete Koomen, App Engine Team

[App Engine Team]

This maintenance has begun.

On Feb 27, 8:17 pm, App Engine Team <appengine.nore...@gmail.com>
wrote:

[Pete Koomen]

This maintenance is now complete. All apps are serving normally.

Pete Koomen, App Engine Team

On Mar 2, 6:14 pm, App Engine Team <appengine.nore...@gmail.com>

[Pete Koomen]

For a period of 10 minutes after this maintenance completed all apps
saw elevated latencies, and a very small number of apps saw an
increase in error rates. This problem has been fixed, and apps are
now serving normally.

Pete Koomen, App Engine Team