Hie
you guys put me in doubt then.
I opened the browser and logged in to my app which created a request to pull
authentication info. and once i logged in i queried a page and this was
another request.
In this process i got the two different UserClassLoader. So, does your
statement holds good?
Thankx and Regards
Vik
Founder
www.sakshum.com
www.sakshum.blogspot.com
On Thu, Sep 17, 2009 at 11:19 PM, Toby Reyelts <to...@google.com> wrote:
> Just to clarify what Jason is saying, the fact that you're seeing two
> different UserClassLoader instances in those two requests:
>
> userclassloa...@1f7cdc7 and
> userclassloa...@1e6f0ef
>
> means that you're actually looking at two requests for two different
> isolated application instances, with each one undergoing its own
> initialization.
>
> On Thu, Sep 17, 2009 at 1:19 PM, Jason (Google) <apija...@google.com>wrote:
>
>> 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 <vik....@gmail.com> 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 <schwa...@google.com>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 <vik....@gmail.com> 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 <vik....@gmail.com> 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 <to...@google.com>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 <vik....@gmail.com> 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 <to...@google.com>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 <vik....@gmail.com> 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 <vik....@gmail.com> 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.
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
-~----------~----~----~----~------~----~------~--~---
