Datastore error in production...

[Andy Burke]

I seem to get the following error intermittently:

app s~XXX cannot access app dev~XXX data

I am getting it right now after a recent deploy.  My application is running on the High Replication store.  I have always used the App Engine Launcher to do my deploys, have not used the command line.

It's super, super frustrating.  No idea why this is happening or what recourse I could possibly take to fix it.  I have tried re-deploying to no avail.

Any help or guidance would be appreciated.

andy

[Tim Hoffman]

Hi

It looks like you have a key reference to some dev data.  Appids are embedded in the keys of entities.

dev~ is from the dev environment.  Have you harded coded a key (str(db.Key()) some where ?

Have a look at the stack trace to see where in your code this is occurring. Is it in a consistent location ?

Rgds

T

[Ikai Lan (Google)]

Uh oh. Yep, Tim is right. This happens because datastore keys embed application IDs in them. When you do a migration, if you have something with a List of Key objects, we will extract the app ID and rewrite them. However, if your key object is encoded as a string, we don't do deep examination of each String that is stored, so you are probably getting this error when you try to convert a String key back into a value.

--

Ikai Lan 
Developer Programs Engineer, Google App Engine

plus.ikailan.com | twitter.com/ikai

T

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