A community for Application Developers on OrangeScape's Platform-as-a-Service
Some times after you deploy and access your application and go to a queue you might get a error like this.
When you deploy your application to Google App Engine, GAE will build all the required indexes which are required. Till the time the indexes are not built the pages will not be served.
You can check the application dashboard in google app engine, to see if the indexes have been built or are still building by going to Dashboard -> Data-> Datastore indexes (the menu on the left side). I have attached a sample screen shot.
By Default Orangescape will list the required indexes when you deploy the application to Google App Engine. and the required indexes will be built by Google App Engine. But the amount of time taken to build the indexes depends on Google App Engine.