URI images in PDF rendered reports retrieved multiple times

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From what I can tell, when using an URI image in a BIRT report design that will be in the PDF format, the image will be requested multiple times from the server.

In my example, the image was of the type URI. The URI was actually pointing to a servlet which streams back the image source data.

When previewing the report in PDF, I noticed that the servlet was getting hit(called) 5 times; however, when I change the format to HTML, I see it only called once as it should be.

I have attached a real basic report design which I used to verify my findings. It will require the modification of the fetch event for the dataset to point it to a valid url.

Has anyone else seen this behavior? Is there something that I am missing?

I am using BIRT 2.2.1.

Thanks,
Dirk