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https://issues.apache.org/jira/browse/LOG4J2-2301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on LOG4J2-2301 started by Carter Kozak.
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> gc-free mixed async loging loses parameter values after the first appender
> --------------------------------------------------------------------------
>
> Key: LOG4J2-2301
> URL: https://issues.apache.org/jira/browse/LOG4J2-2301
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.11.0
> Reporter: Carter Kozak
> Assignee: Carter Kozak
> Priority: Major
>
> When gc-free logging is used with mixed synchronous/asynchronous loggers,
> parameter values are replaced with "null" after the first AsyncLoggerConfig.
> The message format is still present, as well as the parameter count, however
> all values are nulls.
> It appears that Log4jEventWrapperHandler.onEvent invokes
> MutableLogEvent.clear, which nulls out the parameter array.
> I have constructed a failing test (which I need to clean up and deduplicate
> some code from the fix for LOG4J2-2299):
> https://github.com/cakofony/logging-log4j2/commit/b9c03f5c6881bfe778f8e2d75d046ce6e021c4f1
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