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From Ankit Agarwal <ankyizh...@gmail.com>
Subject Re: PDFRendering
Date Mon, 27 Jun 2016 16:47:56 GMT
Hi, Thanks for the reply.
I am using  32 bit jvm and 1.5 gb of heap size.
Still I was getting out of memory error when i was rendering pdf with
multiple pages.
When i introduced system.gc call after each page (which is not ideal and
bad programming choice) , then the pages were being rendered without an
So I think that the bufferedImage from previous page wasn't being cleared
and the next page was loaded( but in my code the image object is flushed
before another use so this shouldn't happen).Anyways system.gc() solved
this for now.
But as we know we cannot be sure that system.gc() will call the garbage
colelctor as the final decision lies with the jvm. So I guess, I'll just
have to try my luck here and continue with the code.

On Mon, Jun 27, 2016 at 9:17 PM, Tilman Hausherr <THausherr@t-online.de>

> Am 27.06.2016 um 15:39 schrieb John Hewson:
>> On 24 Jun 2016, at 00:55, Ankit Agarwal <ankyizhere@gmail.com> wrote:
>>> Hi,
>>> When i try to covert pdf to image then for some pdfs i get a "out of
>>> memory" error. So i increased heap size and then i again got the error
>>> for
>>> some different pdf file.
>>> for the time being assume I have no memory leak from other objects. So
>>> what
>>> would be the reason for this memory out of error?
>>> Would it be just that the image is so large(which is not the case i
>>> think)
>>> that it consumes heap, or maybe pdfbox stores buffered image of each
>>> pages
>>> in its memory and this contributes to the growing heap size?
>>> Any insight would be wonderful.
>> Usually it’s because the PDF contains a compressed image which is very
>> large
>> when decompressed. So the file isn’t big on disk, but it is in memory.
>> Try using
>> a 32-bit JVM as these use less memory. 1GB of heap is usually enough but
>> you
>> can go larger.
> He does use 32bit JVM. I tried two of his files on a 64bit JVM and it has
> rendered for 24 hours with -Xmx400m.
> https://stackoverflow.com/questions/38008475/pdf-rendering-using-pdfbox/38010316#38010316
> Tilman
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