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From Markus Fuchs <Markus.Fu...@Sun.COM>
Subject Re: svn commit: r557089 - in /openjpa/trunk: openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/ openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/schema/ openjpa-jdbc/src/main/resources/org/apache/openjpa/jdbc/kernel/ openjpa-lib/src/main/ja
Date Wed, 18 Jul 2007 20:15:28 GMT
Thanks Marc. I added debug statements the the code accessing the 
_nodeInfo Map. Could somebody please try the attached patch!

-- markus.

Marc Prud'hommeaux wrote:
>
> As a random shot in the dark (I can't reproduce the error on my 
> machine), I notice that the _nodeInfo Map is relying on keys being of 
> type java.util.Collection, and the javadoc for Collection.equals() 
> does not actually require that equality be evaluated based on the 
> content of the collection (although java.util.List.equals() does).
>
> So if somehow there is an IBM-specific list that is being put in there 
> as a key, then a lookup using an equivalent collection might not be 
> succeeding, resulting in _nodeInfo.get(other) returning null.
>
> Anyway, just a guess. Some debug statements would very quickly show it 
> that might be the case or not.
>
>
>
>
>
> On Jul 18, 2007, at 8:59 AM, Patrick Linskey wrote:
>
>> From the source:
>>
>>>             otherInfo = (NodeInfo) _nodeInfo.get(other);
>>>             if (otherInfo.color == NodeInfo.COLOR_WHITE) {
>>
>> Assuming that the class constant is non-null, that leaves otherInfo.
>> _nodeInfo is populated during construction based on the graph passed
>> to the constructor. It looks like the null must be coming from
>> Graph.java:154 or Graph.java:162.
>>
>> -Patrick
>>
>> On 7/18/07, Craig L Russell <Craig.Russell@sun.com> wrote:
>>> So it's either a bug in the IBM vm or a bug in our code that exploits
>>> some loophole in the spec that the Sun JDK doesn't fail on...
>>>
>>> Craig
>>>
>>> On Jul 18, 2007, at 8:38 AM, Kevin Sutter wrote:
>>>
>>> > Yes, and the Sun JDK works just fine.  So, for the majority of the
>>> > folks,
>>> > there is no problem...  :-(
>>> >
>>> > On 7/18/07, Craig L Russell <Craig.Russell@sun.com> wrote:
>>> >>
>>> >> I don't suppose you have run this with the Sun JDK (that I've tested
>>> >> on).
>>> >>
>>> >> Craig
>>> >>
>>> >> On Jul 18, 2007, at 8:00 AM, Kevin Sutter wrote:
>>> >>
>>> >> > Craig,
>>> >> > I haven't taken the time to figure out the source of the problem
>>> >> > yet, but I
>>> >> > am experiencing two NPE's in our test bucket when running with
the
>>> >> > IBM JDK (
>>> >> > 1.5.0 SR5).  I thought I would post a heads-up for any IBM JDK
>>> >> > users...
>>>
>>> Craig Russell
>>> Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
>>> 408 276-5638 mailto:Craig.Russell@sun.com
>>> P.S. A good JDO? O, Gasp!
>>>
>>>
>>>
>>
>>
>> --Patrick Linskey
>> 202 669 5907
>

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