Question

Documentation @ https://developers.google.com/appengine/docs/java/datastore/transactions explains how to handle DatastoreTimeoutException, ConcurrentModificationException, or DatastoreFailureException using low level API, but how can i handle them if I’m using JDO, are they directly thrown or wrapped in a JDO exception?

Answer 1

Any exceptions thrown from JDO methods are JDOExceptions (with nested exception where appropriate). You could easily verify that by reading the JDO spec …