I did some tests where I clear the cache manually after each generation
of a PDF. The result is that the OutOfMemoryException does not occur
anymore. Furthermore the hole process is noticably faster (about 50
minutes instead of 70 minutes for 240 PDFs being generated).
When I find some time I will do some more tests and track the memory
usage of the JVM.
Regards
Dominic
Dominic Brügger wrote:
This will be hard to debug as the generation of this series of PDFs
takes almost an hour and the exception happens late in the process.
But I will test if the exception does not happen when calling
fopFactory.getImageFactory().clearCaches() manually.
Jeremias Maerki wrote:
The image cache has been improved so the manual image cache clearing
should be unnecessary.
Still, you can call fopFactory.getImageFactory().clearCaches(). But if
this is really necessary then we have a problem in the image cache that
should be solved and not worked around. I have done tests a few months
ago and did not manage to cause OutOfMemoryErrors. So if your
environment does, it would be great if you could try to debug and find
out why exactly this happens. The image cache uses a WeakHashMap for the
images so the memory should actually be reclaimed if the JVM starts
to run
out of memory. So if that doesn't happen, something is wrong.
On 30.05.2006 10:51:09 Dominic Brügger wrote:
We have a strange behaviour in our application. There is the
possibility to generate single PDFs or several PDFs in series. There
is no problem when producing single PDFs but when generating large
series of PDFs (the same as can be generated singly), we ar running
in an OutOfMemoryException. As is stated on the "FOP Memory"
webpage, clearing the image from time to time cache might prevent
memory exhaustion (we are running FOP embedded). Do you agree that
this could solve the problem?
How to do this with FOP 0.92beta? The description is only available
on the webpage for FOP 0.20.5...
Jeremias Maerki
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