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https://issues.apache.org/jira/browse/LOG4J2-3440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17512151#comment-17512151
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Ralph Goers commented on LOG4J2-3440:
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I'd have a concern here as whatever we do it seems it is going to incomplete in
some way. We could just return the 1.2 appenders as Gary suggests, or we could
return the Log4j 2 Appenders enclosed in AppenderWrappers. But if the user is
then inspecting the wrappers it is likely they will fail.
> Log4j 1.2 bridge getAllAppenders() returns null enumeration
> -----------------------------------------------------------
>
> Key: LOG4J2-3440
> URL: https://issues.apache.org/jira/browse/LOG4J2-3440
> Project: Log4j 2
> Issue Type: Bug
> Components: Log4j 1.2 bridge
> Affects Versions: 2.17.2
> Reporter: Pablo Rogina
> Assignee: Piotr Karwasz
> Priority: Major
>
> Old application using Log4j 1.2.x relies on Logger.getAllAppenders() to
> decide if Log4j it's already configured (returned Enumeration has at least 1
> appender) or not (empty returned Enumeration).
> Some recent code audits mandate to remove log4j v1 component(s) and to
> upgrade to latest 2.17.2 release, so we're using Log4j 1.2 Bridge to comply
> and not to change application code.
> However, we're facing the issue describe here [1] for
> Logger.getRootLogger().getAllAppenders() although with latest Log4j release
> 2.17.2 the issue seems to be that data structure aai is never updated with
> the proper configured appenders, given that now most of the work happens in
> the Log4j v2 Core implementation, thus using LoggerContext
> [1] [java - Log4j getAllAppenders() returns null enumeration - Stack
> Overflow|https://stackoverflow.com/questions/32864929/log4j-getallappenders-returns-null-enumeration]
>
>
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