Maintenance on August 18th (Tuesday) at 9 AM Pacific Time

[Chris Beckmann (App Engine PM)]

On Tuesday, August 17th, App Engine will undergo maintenance for
approximately one hour starting at 9 AM Pacific Time. 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

During this 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.

App Engine Team

[Chris Beckmann (App Engine PM)]

Correction - this maintenance will happen tomorrow, August 18th, not
August 17th as stated in the email text above.

On Aug 17, 10:46 am, "Chris Beckmann (App Engine PM)" <beckmann

[App Engine Team]

Today's scheduled maintenance has completed successfully; all
services
should be functioning normally.

Total time of read-only access was approximately 58 minutes, from
9:12
AM to 9:57 AM Pacific time.

App Engine Team

On Aug 17, 12:05 pm, "Chris Beckmann (App Engine PM)" <beckmann