On Jun 9, 2006, at 3:26 PM, Lothar Krenzien wrote:
> 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
Since you and Bryan are seeing the same issue independently, I'd say
this is a real bug. There are mixed reports under the LRUMap Bugzilla
ticket above on whether synchronizing the LRUMap fixes it. In any
event we'll have to deal with it in Cayenne in some way, so I opened
a Jira ticket [1] and will investigate.
> 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.
It is up to you whether to use bundled commons-collections or not.
There are cayenne.jar and cayenne-nodeps.jar [2].
[1] http://issues.apache.org/cayenne/browse/CAY-565
[2] http://objectstyle.org/confluence/display/CAYDOC/JAR+Files+and
+Dependencies
Andrus
This archive was generated by hypermail 2.0.0 : Tue Jun 13 2006 - 08:45:30 EDT