Right now clients poll the server once to see if the connection is ready (before sending API requests) This won't work if the AIRport famework tab get's reloaded. I tried checking every time but that breaks in inconsistent ways. The way to do it is to just check at the time of reception of the API request and delay it if the app that is being called is not initialized.
Right now if you write a query and forget to add a table in the FROM for the entities you have selected you get an 'undefined' error from within query processing code. Instead there should be a developer friendly error message, stating that an entity is in the "SELECT: {}" clause but is missing from the "FROM: []" clause and should suggest a way to get it done like: "entityAlias.enityName.LEFT_JOIN()"
A transaction can take too long (ex: an application does not reply for whatever reason). There should be a timeout after which the transaction is timed out and the nearest SAVEPOINT is rolled back.
See refactoring.md