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https://issues.apache.org/jira/browse/FOP-2762?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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simon steiner resolved FOP-2762.
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Resolution: Fixed
http://svn.apache.org/viewvc?view=revision&revision=1862557
> Serialisation issues when accessibility enabled and conserve-memory enabled
> ---------------------------------------------------------------------------
>
> Key: FOP-2762
> URL: https://issues.apache.org/jira/browse/FOP-2762
> Project: FOP
> Issue Type: Bug
> Components: renderer/afp, renderer/pdf
> Affects Versions: 2.1, 2.2
> Reporter: Vincent Bonnefoy
> Assignee: simon steiner
> Priority: Major
> Attachments: cfg-accessibility.xml, name.xml, name2fo.xsl,
> stacktrace-intermediate-fo-afp.txt, stacktrace-intermediate-fo-pdf.txt,
> stacktrace-pdf.txt
>
>
> When rendering PDF or AFP using the conserve-memory and accessibility flag
> "on" a serialisation error is thrown.
> I'm using the "representation of document in intermediate format XML" and get
> the following error when the CachedRenderPagesModel.java class is trying to
> save the page to disk.
> {code:java}
> SEVERE: Error while serializing page 1. Reason:
> java.io.NotSerializableException:
> org.apache.fop.render.intermediate.IFStructureTreeBuilder$IFStructureTreeElement
> java.io.NotSerializableException:
> org.apache.fop.render.intermediate.IFStructureTreeBuilder$IFStructureTreeElement
> {code}
> It then leads to a NullPointerException when later the process tries to
> retrieve the page.
> I saw the same behaviour when the output is set as "pdf" and uses the
> PDFStructElem.java object even though that's not the mode I'm using that also
> needs to be fixed.
> {code:java}
> SEVERE: Error while serializing page 1. Reason:
> java.io.NotSerializableException: org.apache.fop.pdf.PDFStructElem$Placeholder
> java.io.NotSerializableException: org.apache.fop.pdf.PDFStructElem$Placeholder
> {code}
> I'm using fop within a java application but I reproduced using fop binaries:
> - name.xml - _comes from the fop website_
> - name2fo.xsl - _comes from the fop website_
> A page citation reference has been added +to force the conserve-memory flag
> to serialise the page to disk+ for unresolved references.
> - cfg-accessibility.xml - _comes from the fop website_
> 2 renderer have been added, PDF and AFP, since that's the ones I'm using.
> The <accessibility>true</accessibility> flag has been turned on
> fop -xml name.xml -xsl name2fo.xsl -c cfg-accessibility.xml out.pdf -conserve
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