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https://issues.apache.org/jira/browse/LOG4J2-2318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carter Kozak reassigned LOG4J2-2318:
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Assignee: Carter Kozak
> AsyncQueueFullMessageUtil causes unparsable message output
> ----------------------------------------------------------
>
> Key: LOG4J2-2318
> URL: https://issues.apache.org/jira/browse/LOG4J2-2318
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.11.0
> Reporter: Carter Kozak
> Assignee: Carter Kozak
> Priority: Major
>
> AsyncQueueFullMessageUtil.transform modifies message format, dropping message
> format and parameters, and concatenates text to the formatted output.
> It's a fairly common workflow to write a message implementation which outputs
> json or some other structured data (e.g. request logs) which are parsed by
> another mechanism. This often uses PatternLayout with pattern "%m%n". The
> current implementation of AsyncQueueFullMessageUtil concatenates a warning to
> the formatted message, which can break parsers.
> Proposal: Avoid modifying the message itself in favor of using
> StatusLogger.warn when messages may be logged out of order.
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