[FOP-1936] FOP is unable to create PDF if there is an unusually large paragraph.

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 1.0
• Component/s: unqualified
• Environment: Operating System: All; Platform: PC
• External issue ID: 51218
• Assignee: fop-dev
• Reporter: Abhijeet
• Created: 18/May/11 12:45
• Updated: 08/Sep/22 15:03
• Resolved: 30/Apr/12 00:17

Description

Hi,

We have two problems :

1. FOP Performs unusually SLOW if there is a large paragraph
We have noticed that when there is an unusually large paragraph than FOP performance is incredibly slow. FOP takes more than 15 minutes in the method findBreakingPoints which is defined in BreakingAlgorithm.java. The paragraph size is of around 50 thousand characters. This method seems to find the best possible Break point. Can we not make this method return a default break point that works for the English language ?

2. FOP uses unusually large memory when running in findBreakingPoints method defined in BreakingAlgorithm.java. This method starts to consume around 500 MB memory creating thousands of Objects of KnuthNode type. Such memory consumption is unacceptable just for finding a line break .

2. FOP gives a SAX Exception on having a long paragraph in Systems which dont have 1.5 GB RAM for a simple paragraph which has 90K Characters. Below is the exception
javax.xml.transform.TransformerConfigurationException: javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: The element type "xsl:template" must be terminated by the matching end-tag "</xsl:template>".
at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:995)
at com.ca.calm.reporter.pdf.PDFGenerator.buildPdf(PDFGenerator.java:1271)
Caused by: javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: The element type "xsl:template" must be terminated by the matching end-tag "</xsl:template>".
at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:991)
... 6 more
Caused by: org.xml.sax.SAXParseException: The element type "xsl:template" must be terminated by the matching end-tag "</xsl:template>".
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at

Is there a way, I can prevent this extensive memory usage and slow performance by using a default break ? I am ready to build the JAR myself. Is this a bug which has already been fixed ?

thanks,
Jeet.