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JPOX, Oracle and a whole lotta waiting

 
Baba Bizlowsky
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Hi y'all.

I'm learning JDO through the use of Roos's wonderful free book, Eclipse, JPOX, and Oracle 10g database.

However I am facing a couple of pretty misterious mistakes. First of all, the execution of a client program (who uses enhanced objects either to simply create a new one or get an Extent) is horribly, horribly slow - even inserting one row to a one column table takes about a minute, or more.

But this is not the worst thing - once I started experimenting with Collections and subclasses, the execution started to take 5 minutes and then comes up this error:



What am I doing wrong? Can someone please tell me?

Thanks in advance.
 
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