Scheduled Maintenance on November 15th at 2pm PST (GMT-8)

[Pete Koomen]

On Saturday, November 15th (tomorrow), App Engine will undergo
scheduled
maintenance at 2pm PST (GMT-8) for approximately 15 minutes. As a
result, 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

Pete Koomen, App Engine Team

[App Engine Team]

An additional note: during tomorrow's scheduled maintenance, memcache
will also be disabled. Calls to the memcache API will not throw
exceptions but will instead return False for set() calls and None for
get() calls (just like any other cache miss.) In addition, memcache
API calls will return immediately during this period, without any
additional latency.

Pete Koomen, App Engine Team

[App Engine Team]

This maintenance is beginning now. The read-only time for any given
application should last between 10 and 20 minutes.

Matthew Blain, App Engine Team


On Nov 14, 10:18 pm, App Engine Team <appengine.nore...@gmail.com>
wrote:

[App Engine Team]

This maintenance is complete as of 2:43 pm PST (GMT-8). The datastore
was reverted to read-only mode for approximately 35 minutes, and all
writes are now executing normally.

Matthew Blain, App Engine Team

On Nov 15, 2:02 pm, App Engine Team <appengine.nore...@gmail.com>