[logback-dev] [JIRA] Commented: (LBCORE-18) classloader for loading autoConfig configuration resource

[Ceki Gulcu (JIRA)]

    [ http://jira.qos.ch/browse/LBCORE-18?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=10976#action_10976 ] 

Ceki Gulcu commented on LBCORE-18:
----------------------------------

Hello Filip,

Thank you for reporting this problem.  In logback 0.9.14, ContextInitializer.autoConfig uses the class loader which loaded the ContextInitializer class to search for resources (logback-test.xml and logback.xml). It does not use TCCL. 

Please let me know if this works for you so that I can close this bug.

> classloader for loading autoConfig configuration resource
> ---------------------------------------------------------
>
>                 Key: LBCORE-18
>                 URL: http://jira.qos.ch/browse/LBCORE-18
>             Project: logback-core
>          Issue Type: Bug
>          Components: Other
>    Affects Versions: unspecified
>         Environment: Operating System: Windows
> Platform: PC
>            Reporter: Filip Jirsák
>            Assignee: Logback dev list
>            Priority: Blocker
>         Attachments: classloader.patch
>
>
> ContextInitializer.autoConfig(LoggerContext) uses current thread context ClassLoader (TCL) nowadays - it calls Thread.currentThread().getContextClassLoader(). Sometimes this classloader has no access to logback classes - for example TCL is parent of classloader, which loaded current class, in oc4j (Oracle J2EE container) at the time of starting servlet container. So logback-*.jar are in WEB-INF/lib directory, but TCL has no access to these jars and to files in WEB-INF/classes.
> I think ContextInitializer.autoConfig(LoggerContext) should try this.getClass().getClassLoader() first and only if it fails it should use Thread.currentThread().getContextClassLoader().

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