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From "Ray Holder (JIRA)" <...@myfaces.apache.org>
Subject [jira] Commented: (TRINIDAD-978) Trininiad Jar file handles not being closed
Date Wed, 05 Mar 2008 20:59:40 GMT

    [ https://issues.apache.org/jira/browse/TRINIDAD-978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575495#action_12575495
] 

Ray Holder commented on TRINIDAD-978:
-------------------------------------

These are all related to file handles not being closed properly when using JarURLConnection
and getLastModified(), as is the case here.

http://www.mail-archive.com/users@myfaces.apache.org/msg39165.html
http://www.mail-archive.com/users@myfaces.apache.org/msg42822.html
https://issues.apache.org/jira/browse/TRINIDAD-806

This post addresses the known issue that seems to be troubling a lot of developers and provides
a fix that could be applied to the *ResourceLoader classes, etc. in Trinidad-api and Trinidad-impl.
http://www.mail-archive.com/wicket-user@lists.sourceforge.net/msg20937.html

Adam Winer may have patched/fixed this issue in the 1.0.x version, but I have not personally
tested it.  It is unclear if he applied the same fix to the 1.2.x versions and if he did then
it does not seem to have helped in this case.  More feedback would be appreciated as Tomas
and I don't really feel comfortable registering MBeans for garbage collection or other hacks.
 How is this being handled by other users out there?

> Trininiad Jar file handles not being closed
> -------------------------------------------
>
>                 Key: TRINIDAD-978
>                 URL: https://issues.apache.org/jira/browse/TRINIDAD-978
>             Project: MyFaces Trinidad
>          Issue Type: Bug
>    Affects Versions: 1.2.7-core
>         Environment: Tomcat 6.0.16 (also Jetty 6.1.7)
> Tomahawk-Sandbox 1.1.7-SNAPSHOT
> Tomahawk 1.1.6
> Trinidad 1.2.7-SNAPSHOT (also 1.2.1 has this same issue)
> JSF Sun RI 1.2 04 or MyFaces 1.2.2
> Facelets 1.1.14
>            Reporter: Tomas Cerny
>            Priority: Blocker
>             Fix For: 1.2.7-core
>
>
> We have a large application built on Trinidad, we are very close to release,
> but our testing has found that Trinidad is not closing file handles after the request.
> Garbage collection correctly closes the handles but they build up too quickly to be
> efficiently garbage collected ( ~54 handles per page hit!). We believe that we have
> narrowed it down to the Trinidad servlet filter (org.apache.myfaces.trinidad.webapp.ResourceServlet)
> as we have performed tests that monitor open file handles on a single simple page in
complete isolation with and
> without Trinidad tags.  When the Trinidad servlet filter is enabled, we see the file
> handles being created but when it is removed from web.xml, the file handles are
> no longer being created.  After we reach the file handle limit then our entire
> application becomes unstable as we can no longer use anything that depends
> on opening file handles or named pipes.
> We came across this post but nothing that specifically addressed a fix for the issue
> in Trinidad:
> https://issues.apache.org/jira/browse/TRINIDAD-806
> Here is a similar issue and fix when using MyFaces JSF:
> https://issues.apache.org/jira/browse/TOMAHAWK-1040
> The file handle leak occurs with both Sun JSF RI 1.2 and MyFaces JSF 1.2.2.
> Specifically, the file handles are being created for trinidad-impl-1.2.7-SNAPSHOT.jar.
> This is a bad hack but I'll include it here because it does seem to actually work
> around the problem.  Load the application in your Web Server, ensuring that
> Trinidad has loaded it's libraries at least once and then remove the file system
> access to the offending trinidad-impl-1.2.7-SNAPSHOT.jar, preventing any file
> access at all.

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