Re: [docbook-apps] Fop error: java.lang.OutOfMemoryError error whengenerating a PDF

[George Cristian Bina <george@oxygenxml.com>]

Hi,

If you see only about 70 MB for Java and you gave it ~2GB with -Xmx and 
you get a memory error then there are good chances that you did not 
actually gave 2GB to Java used to run FOP. Make sure you add the -Xmx 
option to Java and not to FOP, the option should be placed immediately 
after the java executable and not after the FOP class file, in the later 
case the parameter will go in the arguments array of the main method of 
that class.

Best Regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com


Mark Peters wrote:
> I'm in the process of converting my company's install guide to DocBook. 
> Because our product can be installed on a wide variety of server 
> software environments, I'm using profiling to indicate the document 
> sections that apply to a particular operating system or database 
> management system, for example. In all, there are 30 variations of the 
> guide produced from the same set of DocBook XML files, all of which 
> average 150-200 pages.
>  
> Currently, I'm using batch files (in Windows) to:
> 
>    1. Generate the database file (for cross-references) using xslproc
>    2. Generate an XML document based on my profiling criteria using xslproc
>    3. Generate the XSL-FO file using xslproc
>    4. Generate the PDF using Fop.
> 
> These steps successfully produce all but half a dozen of the different 
> versions of the document. The rest of the versions fail during fourth 
> step, when Fop is converting the XSL-Fo file to PDF. Fop quits with the 
> following error:
>  
> Exception in thread "main" java.lang.OutOfMemoryError <<no stack trace 
> available>>
>  
>  
> My log file contains a number of other errors; however, none of these 
> errors in and of themselves are fatal. Fop also displays these errors 
> while converting the other versions of the doc -- the ones that are 
> completed successfully.
>  
> For example:
>  
> [ERROR] JAI support was not installed <read: not present at build time>. 
> Trying to use Jimi instead
> Error creating background image: Error creating FopImage object < 
> http://docbook.sourceforge.net/release/images/draft.png> : Jimi image 
> library not available
>  
> [ERROR] Error in content-height property value 'scale-to-fit': 
> org.apache.fop.fo.expr.PropertyException: No conversion defined
>  
> [INFO] area contents overflows area in line
>  
> [ERROR] Unknown enumerated value for property 'span': inherit
> [ERROR] Error in span property value 'inherit': 
> org.apaache.fop.fo.expr.PropertyException: No conversion defined
>  
>  
>  
> What I've tried so far:
> 
> * Added the -Xmx2048m switch to my fop.bat file. (I'm using a quad Xeon 
> box with 4 GBs of RAM.)
> 
> * Watched my processor and memory usage. The Java.exe file never exceeds 
> 70 MB of memory usage. My processor performance averages less than 30% 
> usage, with occasional brief spikes -- but none when the 
> OutOfMemoryError messages occur.
> 
> * Added breaks in some of my longer text lines (such as long URLs) to 
> try to eliminate the "area contents overflows area in line" messages -- 
> without much success.
> 
>  
>  
> Does anyone have any suggestions for isolating the cause of the 
> OutOfMemoryError messages?  I seem to be giving Java.exe plenty of 
> memory to work with. Fop does not seem to be failing at any one 
> particular location in the process (based on the [INFO] [<page number>] 
> messages in the log).
>  
> Thanks!
>  
> Mark Peters
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