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Posted to issues@cxf.apache.org by "Mattias Jiderhamn (JIRA)" <ji...@apache.org> on 2013/12/06 22:21:35 UTC
[jira] [Updated] (CXF-5442) CXFAuthenticator causes classloader
leaks
[ https://issues.apache.org/jira/browse/CXF-5442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mattias Jiderhamn updated CXF-5442:
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Attachment: cxf.jpg
> CXFAuthenticator causes classloader leaks
> -----------------------------------------
>
> Key: CXF-5442
> URL: https://issues.apache.org/jira/browse/CXF-5442
> Project: CXF
> Issue Type: Bug
> Components: Transports
> Affects Versions: 2.6.10
> Reporter: Mattias Jiderhamn
> Attachments: cxf.jpg
>
>
> org.apache.cxf.transport.http.CXFAuthenticator will cause classloader leaks.
> When CXFAuthenticator.addAuthenticator() is called, org.apache.cxf.transport.http.ReferencingAuthenticator is instantiated in a custom "dummy" URLClassLoader, and then wraps any pre-existing default Authenticator + weak references the CXFAuthenticator.
> In theory, this means that the classloader loading the CXFAuthenticator can be garbage collected, and then ReferencingAuthenticator.auth is cleared since CXFAuthenticator.instance is not strongly reachable from GC root.
> I won't say my conclusions are final, but this is how I think it happens: When the dummy URLClassLoader is instantiated, it inherits the AccessControlContext that references the current classloader, which is the one that loaded CXFAuthenticator and thus there is a path to GC root (see screenshot) and the web app classloader is never garbage collected.
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