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From Lothar Krenzien <lkrenz...@web.de>
Subject Re: AW: NullPointerException when using shared cache
Date Tue, 26 Sep 2006 16:17:01 GMT
Cool ;)

We had the same problem with syncronization in the past. After we turned it off the problems
went away. So because we couldn't reproduce it and the error occured "only" 2-3 time per week
we decided to live without syncronization. 
Now I'm very interested in the testing results of the other users.

Lothar


> -----Ursprüngliche Nachricht-----
> Von: cayenne-user@incubator.apache.org
> Gesendet: 26.09.06 17:34:38
> An: cayenne-user@incubator.apache.org
> Betreff: Re: AW: NullPointerException when using shared cache


> Cool. I'll check it to trunk and eventually - 2.0 branch.
> 
> Thanks
> Andrus
> 
> 
> On Sep 26, 2006, at 11:23 AM, Ayhan Kondoz wrote:
> > Hello Andrus,
> >
> > the new patch seems to be working. It has been 24 hours now that  
> > the new patched jar file is beeing used in my productive system and  
> > no NullPointerException. I think the bug can be marked resolved and  
> > closed.
> >
> > Thanx
> > Ayhan Kondoz
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Ayhan Kondoz [mailto:Ayhan.Kondoz@freenet-ag.de]
> >> Gesendet: Montag, 25. September 2006 17:13
> >> An: cayenne-user@incubator.apache.org
> >> Betreff: AW: NullPointerException when using shared cache
> >>
> >> Hello Andrus,
> >>
> >> i installed the new jar in out production system and everything  
> >> seems to
> >> work fine so far. It's online for 6 hours and the error didn't  
> >> happen.
> >> Before the patch it took up to 5-6 hours until the error occurred the
> >> first time.
> >>
> >> I will report again tomorrow.
> >>
> >> Thanx so far
> >>
> >> Ayhan Kondoz
> >>
> >>> -----Ursprüngliche Nachricht-----
> >>> Von: Andrus Adamchik [mailto:andrus@objectstyle.org]
> >>> Gesendet: Montag, 25. September 2006 02:32
> >>> An: cayenne-user@incubator.apache.org
> >>> Betreff: Re: NullPointerException when using shared cache
> >>>
> >>> Ayhan, Wolfgang and others who have this synchronization issue - I
> >>> posted a patched version of 1.2.1 Cayenne:
> >>>
> >>> http://dev.objectstyle.org/~andrus/cayenne-1.2.1-CAY-565- 
> >>> patched.tar.gz
> >>>
> >>> I would appreciate very much if you could test it in your  
> >>> environment
> >>> and let me know whether it fixes the problem. I posted more comments
> >>> and the exact patches that were applies on Jira:
> >>>
> >>> http://issues.apache.org/cayenne/browse/CAY-565
> >>>
> >>> Thanks
> >>> Andrus
> >>>
> >>>
> >>> On Sep 12, 2006, at 9:35 AM, Andrus Adamchik wrote:
> >>>
> >>>> CAY-565 was closed as "Can not reproduce", so there was no fix. I
> >>>> reopened this issue, bumping the priority to "Critical". I will add
> >>>> synchronization, even though I can't test it.
> >>>>
> >>>> Andrus
> >>>>
> >>>>
> >>>> On Sep 12, 2006, at 5:51 AM, Ayhan Kondoz wrote:
> >>>>> Hello,
> >>>>>
> >>>>>
> >>>>>
> >>>>> I am getting NullPointerExceptions when I am trying to use the
> >>>>> shared caching feature of cayenne.
> >>>>>
> >>>>>
> >>>>>
> >>>>> I have 3 servers. Each server has it's own tomcat / axis
> >>>>> webservice and I have an avarage access of about 4 - 5 connections
> >>>>> per second. Each connection results in about 3 - 4 select queries
> >>>>> and about 20% of the connections result in an additional 2 - 3
> >>>>> insert / update queries. So the servers are working at pretty
> >>>>> heavy load.
> >>>>>
> >>>>>
> >>>>>
> >>>>> Yesterday I implemented the usage of cayenne's (remote) shared
> >>>>> caching feature using JavaGroups and at first everything seemed
to
> >>>>> work just fine. But after about 1 hour, one of the servers started
> >>>>> to produce NullPointerExceptions on every connection. i found this
> >>>>> bug ( http://issues.apache.org/cayenne/browse/CAY-565 ) which
> >>>>> seems to address my problem but the status is resolved?!
> >>>>>
> >>>>>
> >>>>>
> >>>>> i tried cayenne 1.2 and 1.2B1 and in both cases got this
> >>>>> exceptions but only if shared caching is activated. When I
> >>>>> deactivate caching everything seems to work fine again.
> >>>>>
> >>>>> It seems that there is a problem with the syncronization. This
> >>>>> error occursed when under heavy load and a lot of threads are
> >>>>> active at the same time. But if it is really a syncronization
> >>>>> problem the same error could occure on every system (even if much
> >>>>> more unlikely) even if not under heavy load.
> >>>>>
> >>>>>
> >>>>>
> >>>>> Cheers
> >>>>>
> >>>>> Ayhan Kondoz
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> The exception when using common-collections 3.2
> >>>>>
> >>>>>
> >>>>>
> >>>>> [11.09.06 21:30:32] (ERROR): Entry.next=null, data[removeIndex]
> >>>>> =<ObjectId:Customer,
> >>>>> id=534080>=org.objectstyle.cayenne.DataRow@fda158[values=
> >>>>> {suspended=false, login=christian.hantke1, rec_create=Tue May 02
> >>>>> 00:00:00 CEST 2006, rec_change=Tue May 02 20:18:34 CEST 2006,
> >>>>> last_updated=Mon Sep 11 21:28:26 CEST 2006, cid=709779451,
> >>>>> id=534080, mandant_id=3}, version=-9223372036854422785,
> >>>>> replaces=-9223372036854775808] previous=<ObjectId:Customer,
> >>>>> d=534080>=org.objectstyle.cayenne.DataRow@fda158[values=
> >>>>> {suspended=false, login=christian.hantke1, rec_create=Tue May 02
> >>>>> 00:00:00 CEST 2006, rec_change=Tue May 02 20:18:34 CEST 2006,
> >>>>> last_updated=Mon Sep 11 21:28:26 CEST 2006, cid=709779451,
> >>>>> id=534080, mandant_id=3}, version=-9223372036854422785,
> >>>>> replaces=-9223372036854775808] key=<Ob
> >>>>>
> >>>>> jectId:Customer, id=364956>
> >>>>> value=org.objectstyle.cayenne.DataRow@426844[values=
> >>>>> {suspended=false, login=nadda89, rec_create=Thu Mar 30 00:00:00
> >>>>> CEST 2006, rec_change=Thu Mar 30 22:19:00 CEST 2006,
> >>>>> last_updated=Fri Aug 04 16:09:35 CEST 2006, cid=705229711,
> >>>>> id=364956, mandant_id=3}, version=-9223372036854407476,
> >>>>> replaces=-9223372036854775808] size=10000 maxSize=10000 Please
> >>>>> check that your keys are immutable, and that you have used
> >>>>> synchronization properly. If so, then please report this to
> >>>>> commons-dev@jakarta.apache.org as a bug.
> >>>>>
> >>>>> java.lang.IllegalStateException: Entry.next=null, data 
> >>>>> [removeIndex]
> >>>>> =<ObjectId:Customer,
> >>>>> id=534080>=org.objectstyle.cayenne.DataRow@fda158[values=
> >>>>> {suspended=false, login=christian.hantke1, rec_create=Tue May 02
> >>>>> 00:00:00 CEST 2006, rec_change=Tue May 02 20:18:34 CEST 2006,
> >>>>> last_updated=Mon Sep 11 21:28:26 CEST 2006, cid=709779451,
> >>>>> id=534080, mandant_id=3}, version=-9223372036854422785,
> >>>>> replaces=-9223372036854775808] previous=<ObjectId:Customer,
> >>>>> id=534080>=org.objectstyle.cayenne.DataRow@fda158[values=
> >>>>> {suspended=false, login=christian.hantke1, rec_create=Tue May 02
> >>>>> 00:00:00 CEST 20 06, rec_change=Tue May 02 20:18:34 CEST 2006,
> >>>>> last_updated=Mon Sep 11 21:28:26 CEST 2006, cid=709779451,
> >>>>> id=534080, mandant_id=3}, version=-9223372036854422785,
> >>>>> replaces=-9223372036854775808] key=<ObjectId:Customer, id=364956>
> >>>>> value=org.objectstyle.cayenne.DataRow@426844[values=
> >>>>> {suspended=false, login=nadda89, rec_create=Thu Mar 30 00:00:00
> >>>>> CEST 2006, rec_change=Thu Mar 30 22:19:00 CEST 2006,
> >>>>> last_updated=Fri Aug 04 16:09:35 CEST 2006, cid=705229711,
> >>>>> id=364956, mandant_id=3}, version=-9223372036854407476,
> >>>>> replaces=-9223372036854775808] size=10000 maxSize=10000 Please
> >>>>> check that your keys are immutable, and that you have used
> >>>>> synchronization properly. If so, then please report this to
> >>>>> commons-dev@jakarta.apache.org as a bug.
> >>>>>
> >>>>>         at org.apache.commons.collections.map.LRUMap.reuseMapping
> >>>>> (LRUMap.java:300)
> >>>>>
> >>>>>         at org.apache.commons.collections.map.LRUMap.addMapping
> >>>>> (LRUMap.java:266)
> >>>>>
> >>>>>         at  
> >>>>> org.apache.commons.collections.map.AbstractHashedMap.put
> >>>>> (AbstractHashedMap.java:283)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataRowStore.processUpdatedSnapshot

> >>>>> s
> >>>>> (DataRowStore.java:537)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataRowStore.processSnapshotChanges
> >>>>> (DataRowStore.java:496)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.ObjectStore.snapshotsUpdatedForObje

> >>>>> cts
> >>>>> (ObjectStore.java:559)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows
> >>>>> (ObjectResolver.java:162)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsF

> >>>>> rom
> >>>>> DataRows(ObjectResolver.java:137)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObje

> >>>>> ctC
> >>>>> onversion(DataDomainQueryAction.java:363)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute
> >>>>> (DataDomainQueryAction.java:151)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataDomain.onQuery
> >>>>> (DataDomain.java:715)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery
> >>>>> (ObjectContextQueryAction.java:249)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataContextQueryAction.execute
> >>>>> (DataContextQueryAction.java:90)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataContext.onQuery
> >>>>> (DataContext.java:1320)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataContext.performQuery
> >>>>> (DataContext.java:1309)
> >>>>>
> >>>>>
> >>>>>
> >>>>> The exception when using common-collections 3.1
> >>>>>
> >>>>>
> >>>>>
> >>>>> [11.09.06 15:29:13] (ERROR):
> >>>>>
> >>>>> java.lang.NullPointerException
> >>>>>
> >>>>>         at org.apache.commons.collections.map.LRUMap.reuseMapping
> >>>>> (LRUMap.java:272)
> >>>>>
> >>>>>         at org.apache.commons.collections.map.LRUMap.addMapping
> >>>>> (LRUMap.java:243)
> >>>>>
> >>>>>         at  
> >>>>> org.apache.commons.collections.map.AbstractHashedMap.put
> >>>>> (AbstractHashedMap.java:282)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataRowStore.processUpdatedSnapshot

> >>>>> s
> >>>>> (DataRowStore.java:612)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataRowStore.processSnapshotChanges
> >>>>> (DataRowStore.java:571)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataRowStore.snapshotsUpdatedForObj

> >>>>> ect
> >>>>> s(DataRowStore.java:313)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows
> >>>>> (ObjectResolver.java:159)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsF

> >>>>> rom
> >>>>> DataRows(ObjectResolver.java:134)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObje

> >>>>> ctC
> >>>>> onversion(DataDomainQueryAction.java:373)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataDomainQueryAction.execute
> >>>>> (DataDomainQueryAction.java:151)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataDomain.onQuery
> >>>>> (DataDomain.java:766)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery
> >>>>> (ObjectContextQueryAction.java:253)
> >>>>>
> >>>>>         at
> >>>>> org.objectstyle.cayenne.access.DataContextQueryAction.execute
> >>>>> (DataContextQueryAction.java:90)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataContext.onQuery
> >>>>> (DataContext.java:1422)
> >>>>>
> >>>>>         at org.objectstyle.cayenne.access.DataContext.performQuery
> >>>>> (DataContext.java:1411)
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> Ayhan Kondoz
> >>>>>
> >>>>>
> >>>>>
> >>>>> Software-Entwicklung
> >>>>>
> >>>>>
> >>>>>
> >>>>> ------------------------------------------------------------------

> >>>>> ---
> >>>>> -------------
> >>>>>
> >>>>> Telefon:    +49 (0) 40 513 06 616
> >>>>>
> >>>>> Telefax:    +49 (0) 40 513 06 998 616
> >>>>>
> >>>>> E-Mail:     ayhan.kondoz@freenet-ag.de
> >>>>> <mailto:ayhan.kondoz@freenet-ag.de>
> >>>>>
> >>>>> Website:  http://www.freenet.de <http://www.freenet.de/> ;
http://
> >>>>> www.freenet-ag.de <http://www.freenet-ag.de/>
> >>>>>
> >>>>> ------------------------------------------------------------------

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> >>>>>
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> >>>>>
> >>>>> 22297 Hamburg
> >>>>>
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> >>>>
> >>>>
> >
> >
> 



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