Ma, Liang wrote:
Now here is another minor problem. Every time when I first run the servlet
to generate a pdf file after rebooting tomcat or leaving it for a couple of
days, it gives me the following exception. Then I run it again, it works
fine. Looks like there is something missing to initialize fop in my servlet.
root cause
java.lang.NullPointerException
at org.apache.fop.apps.Service.providers(Driver.java:597)
Ah, the dreaded class loader problem.
Actually, I don't understand class loading in web apps well enough
to point you to a solution. You might ask this on an appropriate
Tomcat list (be prepared for getting flamed for using code which
is not "web app ready")
J.Pietschmann
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