xalan-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Robert Olofsson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (XALANJ-2195) Memory leak in XMLReaderManager
Date Fri, 26 Oct 2012 09:55:12 GMT

    [ https://issues.apache.org/jira/browse/XALANJ-2195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484821#comment-13484821

Robert Olofsson commented on XALANJ-2195:

That looks very interesting, maybe finally there will an official solution for this leak.
> Memory leak in XMLReaderManager
> -------------------------------
>                 Key: XALANJ-2195
>                 URL: https://issues.apache.org/jira/browse/XALANJ-2195
>             Project: XalanJ2
>          Issue Type: Bug
>          Components: Xalan
>    Affects Versions: 2.7
>            Reporter: Marko Strukelj
>            Priority: Blocker
>         Attachments: gc-roots.jpg, retained-object-sizes.jpg, xalan-j2-2.6.0-xmlmemoryleak-tm2l.patch
> In class org.apache.xml.utils.XMLReaderManager 
> getXMLReader() method creates a new XMLReader (i.e. SAXParser) and stores it into ThreadLocal.
> releaseXMLReader() does not remove (set to null) ThreadLocal thus creating a permanent
> Unfortunately the size of the cached Reader is typically dependent upon the size of the
XML document you process (depends on implementation but this is the case with xerces SAXParser).
In heavy load server environments with thread pools of tens and hundreds of threads the server
sustains a significant memory leak (hundreds of megabytes - depending on the XML document
sizes and number of threads in a thread pools).
> A fix is trivial:
> Put the following line at the end of releaseXMLReader method:
> m_readers.set(null);
> I wonder, why is reader stored in ThreadLocal in the first place?

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

To unsubscribe, e-mail: dev-unsubscribe@xalan.apache.org
For additional commands, e-mail: dev-help@xalan.apache.org

View raw message