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https://issues.apache.org/jira/browse/LOG4J2-3032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17293240#comment-17293240
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Caleb Cushing commented on LOG4J2-3032:
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Yeah, looks like a duplicate.
> Memory appender that can be flushed to another appender later
> -------------------------------------------------------------
>
> Key: LOG4J2-3032
> URL: https://issues.apache.org/jira/browse/LOG4J2-3032
> Project: Log4j 2
> Issue Type: New Feature
> Reporter: Caleb Cushing
> Priority: Major
>
> Here's [my use case](https://stackoverflow.com/q/66069724/206466 ).
> Basically, I only want to print test logs if the test fails. I think this
> could be fixed by having some kind of in-memory appender, just a hashmap
> would do, and then allow adding a child (or something) appender that could
> read the entirety of this data and then log it. Maybe just some way to have
> an appender read a queue of messages and log immediately.
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