Hi,

in my portlet I'm trying to access the db over hibernate. Unfortunately this doesn't seem to be very reliable (at least how I configured it...). After googeling a little I found out that the "Hibernate Reference Documentation v3.0.5" isn't quite up to date and that you don't have to use Tomcat's JNDI-bound JDBC connections anymore [2].

My problem is now that it still doesn't work in a reliable way. The symptoms are that if I access the portlet for the first time the db query is (mostly) successful. After that I get NullPointerExceptions. To make sure it's not my hibernate code, I tried the same query in standalone application (without Tomcat/Pluto). It worked without any problems.

Does anybody have a clue what's going wrong here? How did you get hibernate to work reliable within your portlet? Any hints or suggestions are highly appreciated!


[1] http://www.hibernate.org/hib_docs/v3/reference/en/html/quickstart.html
[2] http://www.hibernate.org/114.html

Regards,
Andi

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