OutOfMemory issue with 5.5.6 version of iText

Hi ,
Currently we are using 5.5.6 snapshot to generate PDF files.
We are executing load test in lower environmnets with two weblogic managed
nodes , we faced OutOfMemory exception while generating 5 PDF files ata a
time , each PDF file size will be 30 MB , iText is consuming more memory
while generating PDF/A files using iText 5.5.6 snapshot.

We taken a heap dump on the server and we have attached "OOM.png" and
memory.png which says that for 2 parallel reports, PDFStructureEmlement is
taking 1.5GB of memory. Request you to identify the issue causing it.

<http://itext.2136553.n4.nabble.com/file/n4660796/memory_profile.png> 
<http://itext.2136553.n4.nabble.com/file/n4660796/oom.png> 

Below is the PDF structure , first section tag represents a table. for our
convience we made changes to the tags.
<document> 
<page>
<!-table for headings-> 
<cell> 
</cell
<cell>


</cell>
<cell>


</cell>

 
<cell> 
 
<cell /> 
<cell /> <!-etc-> 
 
 
<cell /> 
<cell /> <!-etc-> 
 
</cell> 

 
<cell>
</cell>

</page> 

</document>



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