Hi Jason, I am retaking this thread because I am experiencing the same "Caused by: javax.jdo.JDOFatalUserException..." issue. I'm not using other frameworks than GAE. The IDE I'm using is NetBeans and I'm using Java. The PMF singleton is in place, just like explained in the docs.
Thanks, Jorge Gonzalez On Oct 6, 2:05 pm, "Jason (Google)" <apija...@google.com> wrote: > Are you using any frameworks on top of App Engine for Java or are you using > a JVM-based language other than Java? > - Jason > > On Mon, Oct 5, 2009 at 1:47 AM, Omer Saatcioglu <osaatcio...@gmail.com>wrote: > > > > > Interestingly, I use Persistence Manager as singleton just like in the > > document. But I have the same error. > > > I do db operations in several methods. When I enter to the method I > > get the Persistence Manager from the singleton object and I close the > > persistence manager at the end of the method. When I call several > > methods that do this operation it crashes with exactly the same error. > > > Do you have any advise? > > > Omer > > > On Sep 25, 10:14 pm, "Jason (Google)" <apija...@google.com> wrote: > > > Make sure you're using a PMF singleton as described here: > > > >http://code.google.com/appengine/docs/java/datastore/usingjdo.html#Ge... > > > > Then you can call PMF.get().getPersistenceManager in all of your classes > > > instead of continually instantiating new PersistenceManagerFactory > > objects, > > > which is an expensive operation. > > > > - Jason > > > > On Wed, Sep 23, 2009 at 5:27 PM, Vatsa <vats...@gmail.com> wrote: > > > > > Hi, > > > > I am a newbie to "Google App Engine". We are trying to prototype a > > > > simple application to persist DTO which are read from a .csv file to > > > > the virtual data store. > > > > > I get the following error (very descriptive) at the time of > > > > instantiating the Access Manager > > > > > Caused by: javax.jdo.JDOFatalUserException: Application code attempted > > > > to create a PersistenceManagerFactory named transactions-optional, but > > > > one with this name already exists! Instances of > > > > PersistenceManagerFactory are extremely slow to create and it is > > > > usually not necessary to create one with a given name more than once. > > > > Instead, create a singleton and share it throughout your code. If you > > > > really do need to create a duplicate PersistenceManagerFactory (such > > > > as for a unittest suite), set the > > > > appengine.orm.disable.duplicate.pmf.exception system property to avoid > > > > this error. > > > > > Thanks > > > > Vatsa --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
