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https://issues.apache.org/jira/browse/LOG4J2-1676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15647134#comment-15647134
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Joern Huxhorn commented on LOG4J2-1676:
---------------------------------------
Others may correct me but I'm pretty sure it's there because the "is the
Throwable 'used up' while formatting the message" decision is implementation
specific.
"{0} {1}" vs. "{} {}" vs. "%s %s".
{{getThrowable()}} should only return a {{Throwable}} if it is not 'used up' by
placeholders. But then it definitely should and is doing so right now.
The message factory being used can be specified via system property
{{"log4j2.messageFactory"}}. I don't think that this is the best idea but that
is an entirely different issue...
> Use Message.getThrowable() in log(Message) methods
> --------------------------------------------------
>
> Key: LOG4J2-1676
> URL: https://issues.apache.org/jira/browse/LOG4J2-1676
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.5, 2.6, 2.7
> Reporter: Joern Huxhorn
>
> All {{log(Message)}} methods should use {{Message.getThrowable()}}, e.g.
> {code:java}
> public void debug(final Message msg) {
> logIfEnabled(FQCN, Level.DEBUG, null, msg, msg != null ?
> msg.getThrowable() : null);
> }
> {code}
> instead of the current
> {code:java}
> public void debug(final Message msg) {
> logIfEnabled(FQCN, Level.DEBUG, null, msg, null);
> }
> {code}
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