I don't the undo-support is causing the problem but doesn't it 
seem unnecessary to track undos for ResultSets? I will try to create a 
simple reproducible case.

Regards
Carl

On Thursday, April 12, 2012 9:13:22 PM UTC+2, Thomas Mueller wrote:
>
> Hi,
>
> Do you have a reproducible test case? If possible, could you send it?
>
>>
>>    1. What does this do? log.addUndo(pageId, null); 
>>    (in PageStore.java:1212) 
>>
>> As in the comment in the source code, "ensure the undo entry is already 
> written". 
>
>>
>>    1. To me it looks like setting the page-parameter to null is what is 
>>    causing the exception.
>>
>> No, it's just a verification. 
>
>>
>>    1. Wouldn't it be better to just delete the ResultSet-table without 
>>    undo-support? Is there any use-case when you want to undo the closing of 
>> a 
>>    ResultSet? 
>>
>> I don't think that's the problem.
>
> Regards,
> Thomas
>

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