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https://issues.apache.org/jira/browse/FOP-2860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raman Katsora updated FOP-2860:
-------------------------------
Description:
when a single element (e.g. {{<fo:block>}}) contains a sufficiently large
amount of text, the fo-to-pdf transformation causes very high memory
consumption.
For instance, transforming a document with {{<fo:block>}} containing 1.5
million characters (~1.5Mb [^test-1500000.fo]) requires about 3Gb of RAM.
The heapdump shows 27.5 million
{{org.apache.fop.layoutmgr.BreakingAlgorithm.KnuthNode}} (~2.6Gb).
We start observing this issue, having about 300 thousand characters in a single
element ([^test-300000.fo]). But the high memory consumption isn't observed
when processing 250 thousand characters ([^test-250000.fo]).
was:
when a single element (e.g. {{<fo:block>}}) contains a sufficiently large
amount of text, the fo-to-pdf transformation causes very high memory
consumption.
For instance, transforming a document with {{<fo:block>}} containing 1.5
million characters (~1.5Mb [^test.fo]) requires about 3Gb of RAM.
The heapdump shows 27.5 million
{{org.apache.fop.layoutmgr.BreakingAlgorithm.KnuthNode}} (~2.6Gb).
We start observing this issue, having about 300 thousand characters in a single
element ([^test-300000.fo]). But the high memory consumption isn't observed
when processing 250 thousand characters ([^test-250000.fo]).
> BreakingAlgorithm causes high memory consumption
> ------------------------------------------------
>
> Key: FOP-2860
> URL: https://issues.apache.org/jira/browse/FOP-2860
> Project: FOP
> Issue Type: Bug
> Affects Versions: 2.3
> Reporter: Raman Katsora
> Priority: Critical
> Attachments: image-2019-04-16-10-07-53-502.png, test-1500000.fo,
> test-250000.fo, test-300000.fo
>
>
> when a single element (e.g. {{<fo:block>}}) contains a sufficiently large
> amount of text, the fo-to-pdf transformation causes very high memory
> consumption.
> For instance, transforming a document with {{<fo:block>}} containing 1.5
> million characters (~1.5Mb [^test-1500000.fo]) requires about 3Gb of RAM.
> The heapdump shows 27.5 million
> {{org.apache.fop.layoutmgr.BreakingAlgorithm.KnuthNode}} (~2.6Gb).
> We start observing this issue, having about 300 thousand characters in a
> single element ([^test-300000.fo]). But the high memory consumption isn't
> observed when processing 250 thousand characters ([^test-250000.fo]).
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