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https://issues.apache.org/jira/browse/XERCESJ-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebastian Millies updated XERCESJ-1653:
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Attachment: elemlist.dtd
> Memory leak with validating SAX Parser
> --------------------------------------
>
> Key: XERCESJ-1653
> URL: https://issues.apache.org/jira/browse/XERCESJ-1653
> Project: Xerces2-J
> Issue Type: Bug
> Components: SAX
> Affects Versions: 2.11.0
> Environment: Windows 7 Enterprise, JDK 1.8.0_25
> Reporter: Sebastian Millies
> Priority: Critical
> Attachments: SAXMemoryUsage.java, SAXMemoryUsage.log, _subelem.dtd,
> elemlist.dtd
>
>
> I'm parsing a very large XML file with org.apache.xerces.parsers.SAXParser
> and validation turned on. The file contains 25 million elements of the form
> specified in the attached DTD's, in total it is ca. 7 GB large.
> Heap monitoring with jvisualvm shows millions of QName instances being cached
> and not being garbage collected.
> Turning off validation makes the problem disappear.
> I have tested a numer of other parsers (Crimson, Aelfred2, Resin, Woodstox).
> With Woodstox, for example, I can process my 7 GB file (including validation)
> with just 64MB of heap. With Xerces, 1024MB of heap do not suffice.
> I'll attach a small diagnosis program (SAXMemoryUsage.java) that shows that
> Xerces heap consumption increases inordinately.
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