Just to comlete my previous post:
I get the same exception from DataDomainQueryAction.interceptOIDQuery.
Exception in thread "Thread-9076" 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.DataDomainQueryAction.interceptOIDQuery(DataDomainQueryAction.java:187)
at
org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:142)
at
org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:765)
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)
at
org.objectstyle.cayenne.DataObjectUtils.objectForQuery(DataObjectUtils.java:290)
at
org.objectstyle.cayenne.DataObjectUtils.objectForPK(DataObjectUtils.java:276)
at
org.objectstyle.cayenne.DataObjectUtils.objectForPK(DataObjectUtils.java:185)
at
com.conergy.sunreader.sr2.back.dao.DAOCore.getObjectForPKValue(Unknown Source)
at com.conergy.sunreader.sr2.back.dao.StatusDAO.getStatusFromDB(Unknown
Source)
Lothar
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> Gesendet: 09.06.06 13:27:18
> An: [email protected]
> Betreff: NullPointerException in LRUMap.reuseMapping (was
> DataRowStore.processUpdatedSnapshots)
> Hi there ,
>
> I'm using the recent Cayenne version with Tomcat 5.5 and Java 5. Since a few
> days I get very often a NullPointerException from cayenne. Analysing the
> stack trace it seems that the exception is thrown by Apache's commons
> collection class LRUMap. I've found a possible solution at BugZilla:
> http://issues.apache.org/bugzilla/show_bug.cgi?id=32573
>
> There it is saied that it could be a synchronising problem. And I'm getting
> the exeption only after a while the server is running and lots of users are
> connected. Would it be possible to try the suggestions from BugZilla? There's
> another post of the same excption in this group a few days ago. So it seems
> to be a very serious problem.
> http://www.objectstyle.org/cayenne/lists/cayenne-user/2006/06/0017.html
>
> What I've just realized that cayenne comes with it's own copy of common
> collections packed in the cayenne.jar. For me that seems not be very usefull.
> Instead of it I would prefer a link on the cayenne download page. That way I
> could independently update cayenne and/ or commons collection.
>
> Here's the full stack trace:
> 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.processUpdatedSnapshots(DataRowStore.java:612)
> at
> org.objectstyle.cayenne.access.DataRowStore.processSnapshotChanges(DataRowStore.java:571)
> at
> org.objectstyle.cayenne.access.DataRowStore.snapshotsUpdatedForObjects(DataRowStore.java:313)
> at
> org.objectstyle.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:159)
> at
> org.objectstyle.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:134)
> at
> org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
> at
> org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
> at org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:765)
> 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)
> at com.sunreader.sr2.back.dao.ProductDAO.isLoggerAlreadyAvailable(Unknown
> Source)
>
>
> Thanks for any help.
>
> Lothar
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