Reminder: Scheduled Maintenance, November 3rd, 5:00 PM Pacific Time

[App Engine Team]

Reminder: there will be a scheduled maintenance period for App Engine
this Tuesday, November 3rd, at 5:00 PM Pacific Time, for up to one
hour. The datastore will be in read-only mode during this time period;
all datastore writes and transactions will throw an exception. If
you'd like to modify your app to adapt, the relevant Python exception
is:

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.

The maintenance schedule for the remainder of 2009 can be found here:

http://groups.google.com/group/google-appengine-downtime-notify/browse_thread/thread/78f2590cd347fdd0

[App Engine Team]

Reminder: this is starting within the next five minutes.

On Nov 2, 8:39 pm, App Engine Team <appengine.nore...@gmail.com>
wrote:

> http://groups.google.com/group/google-appengine-downtime-notify/brows...

[App Engine Team]

The planned maintenance has concluded successfully. The datastore was
in read-only mode from 5:17 PM to 6:12 PM Pacific time.

The maintenance took longer than expected (~12 minutes) and we
apologize for this inconvenience.

App Engine Team

On Nov 3, 4:59 pm, App Engine Team <appengine.nore...@gmail.com>