Hi Vik. At most a single UserClassLoader is loaded per application instance. Since you're seeing two output lines in your logs, these two requests must have hit separate running instances of your application.
In your benchmarking, you need to account for this initialization, i.e. ignoring requests that are loading requests per application instance, and keep in mind that you're likely to see several loading requests every time you upload a change to your application, as new instances are spun up. - Jason On Thu, Sep 17, 2009 at 8:33 AM, Vik <[email protected]> wrote: > hie > in two different requests. > > Thankx and Regards > > Vik > Founder > www.sakshum.com > www.sakshum.blogspot.com > > > On Thu, Sep 17, 2009 at 8:16 PM, Don Schwarz <[email protected]> wrote: > >> To be clear, you're getting these two log statements in the same request? >> Or subsequent requests? >> >> >> On Thu, Sep 17, 2009 at 1:48 AM, Vik <[email protected]> wrote: >> >>> hie >>> any updates on this please? >>> >>> yeah I did what you suggested by putting a log statement.. >>> >>> and what I get are two different values from this block >>> >>> At first time of app startup >>> vik.sakshum.sakshumweb.jsp.model.jdo.PMF <clinit>: Loading PMF in >>> com.google.apphosting.runtime.security.userclassloa...@1f7cdc7 >>> >>> and in another flow >>> vik.sakshum.sakshumweb.jsp.model.jdo.PMF <clinit>: Loading PMF in >>> com.google.apphosting.runtime.security.userclassloa...@1e6f0ef >>> >>> >>> So, it means it is trying to load it in two different class loaders. So, >>> how should I fix it? >>> >>> Thankx and Regards >>> >>> Vik >>> Founder >>> www.sakshum.com >>> www.sakshum.blogspot.com >>> >>> >>> On Thu, Sep 3, 2009 at 9:01 PM, Vik <[email protected]> wrote: >>> >>>> Hie >>>> Thankx for taking time... >>>> >>>> I just adding the static block u mentioned in point 1 just after the >>>> static block i have (in the above mail) >>>> >>>> I am sorry I did not get your point 2. >>>> Right now what I do is: every time a request goes to a particular >>>> servlet depending upon application flow and i call >>>> PersistentManager pm = PMF.get().getPersistenceManager(); >>>> >>>> and then do jdo stuff with GAE. >>>> >>>> So, i m not checking any kind of duplicate or anything. I was hoping the >>>> PMF class getInstance which is implemented as a singleton pattern >>>> takes care of all. >>>> >>>> Please guide.. my app right now sucks coz of this not intialized error >>>> for PMF. >>>> >>>> >>>> Thankx and Regards >>>> >>>> Vik >>>> Founder >>>> www.sakshum.com >>>> www.sakshum.blogspot.com >>>> >>>> >>>> On Wed, Sep 2, 2009 at 8:42 PM, Toby Reyelts <[email protected]> wrote: >>>> >>>>> Thanks for the code. I have three suggestions (mostly from my previous >>>>> post): >>>>> 1) Are you maybe loading that singleton class in different >>>>> classloaders? Try logging the classloader object reference that tries to >>>>> create the PersistenceManagerFactory. You can add a static initializer >>>>> ABOVE >>>>> pmfInstance. >>>>> >>>>> static { >>>>> logger.log(Level.SEVERE, "Loading PMF in " + >>>>> PMF.class.getClassLoader()"); >>>>> } >>>>> >>>>> 2) Patch the datanucleus plugin code that makes the check for duplicate >>>>> PMF creations to log a stacktrace first thing every time it's called. Then >>>>> you'll know for sure which code paths are causing this to happen. >>>>> >>>>> 3) Disable the check if you're sure you're only creating the PMF a >>>>> small number of times. >>>>> >>>>> On Wed, Sep 2, 2009 at 2:45 AM, Vik <[email protected]> wrote: >>>>> >>>>>> Hie >>>>>> here is the code I am using: >>>>>> package vik.sakshum.sakshumweb.jsp.model.jdo; >>>>>> >>>>>> import javax.jdo.JDOHelper; >>>>>> import javax.jdo.PersistenceManagerFactory; >>>>>> >>>>>> import org.compass.core.Compass; >>>>>> import org.compass.core.config.CompassConfiguration; >>>>>> import org.compass.core.config.CompassEnvironment; >>>>>> import org.compass.gps.CompassGps; >>>>>> import org.compass.gps.device.jdo.Jdo2GpsDevice; >>>>>> import org.compass.gps.impl.SingleCompassGps; >>>>>> >>>>>> public final class PMF { >>>>>> private static final PersistenceManagerFactory pmfInstance = >>>>>> >>>>>> JDOHelper.getPersistenceManagerFactory("transactions-optional"); >>>>>> >>>>>> private static final Compass compass; >>>>>> private static final CompassGps compassGps; >>>>>> >>>>>> static { >>>>>> compass = new >>>>>> CompassConfiguration().setConnection("gae://index") >>>>>> >>>>>> .setSetting(CompassEnvironment.ExecutorManager.EXECUTOR_MANAGER_TYPE, >>>>>> "disabled") >>>>>> .addScan("vik.sakshum.sakshumweb.jsp.model.jdo") >>>>>> .buildCompass(); >>>>>> >>>>>> compassGps = new SingleCompassGps(compass); >>>>>> compassGps.addGpsDevice(new Jdo2GpsDevice("appenine", >>>>>> pmfInstance)); >>>>>> compassGps.start(); >>>>>> >>>>>> compassGps.index(); >>>>>> >>>>>> } >>>>>> >>>>>> private PMF() {} >>>>>> >>>>>> public static PersistenceManagerFactory get() { >>>>>> return pmfInstance; >>>>>> } >>>>>> >>>>>> public static Compass getCompass(){ >>>>>> return compass; >>>>>> } >>>>>> } >>>>>> >>>>>> any clues? >>>>>> >>>>>> Thankx and Regards >>>>>> >>>>>> Vik >>>>>> Founder >>>>>> www.sakshum.com >>>>>> www.sakshum.blogspot.com >>>>>> >>>>>> >>>>>> On Wed, Sep 2, 2009 at 12:34 AM, Toby Reyelts <[email protected]>wrote: >>>>>> >>>>>>> Vik, >>>>>>> >>>>>>> Do you have some sample code to reproduce this? By default, we throw >>>>>>> an exception if you try to create more than one >>>>>>> PersistenceManagerFactory. >>>>>>> Are you using a singleton class to prevent more than one from being >>>>>>> created? >>>>>>> If so, are you maybe loading that singleton class in different >>>>>>> classloaders? >>>>>>> (Try logging the classloader object reference that tries to create the >>>>>>> PersistenceManagerFactory). >>>>>>> >>>>>>> Lastly, you can disable the exception if you want (details should be >>>>>>> in the exception message), but it will be a performance problem for you >>>>>>> if >>>>>>> you're creating more than a few PersistenceManagerFactory's. >>>>>>> >>>>>>> >>>>>>> On Tue, Sep 1, 2009 at 1:51 PM, Vik <[email protected]> wrote: >>>>>>> >>>>>>>> anyone any updates on this please? >>>>>>>> Thankx and Regards >>>>>>>> >>>>>>>> Vik >>>>>>>> Founder >>>>>>>> www.sakshum.com >>>>>>>> www.sakshum.blogspot.com >>>>>>>> >>>>>>>> >>>>>>>> On Sun, Aug 30, 2009 at 8:51 PM, Vik <[email protected]> wrote: >>>>>>>> >>>>>>>>> Hie >>>>>>>>> Any one using compass on his GAE app? >>>>>>>>> >>>>>>>>> I am frequently getting error cannot initialize PMF where there is >>>>>>>>> static code to initialize compass apis. >>>>>>>>> Any idea how to resolve? >>>>>>>>> >>>>>>>>> Thankx and Regards >>>>>>>>> >>>>>>>>> Vik >>>>>>>>> Founder >>>>>>>>> www.sakshum.com >>>>>>>>> www.sakshum.blogspot.com >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>> >>> >>> >>> >> >> >> > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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