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From "Remko Popma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1353) Logger 'Object... params' arguments should always be appended even if {} is missing
Date Tue, 05 Apr 2016 09:04:25 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15225930#comment-15225930

Remko Popma commented on LOG4J2-1353:

So to clarify, the requirement is that both of these usages:

logger.debug("message without placeholders", "param1", "param2", "param3");
logger.debug("message with placeholders {} {} {}", "param1", "param2", "param3");

...should produce the same result:
DEBUG ... message without placeholders param1 param2 param3
DEBUG ... message with placeholders param1 param2 param3

> Logger 'Object... params' arguments should always be appended even if {} is missing
> -----------------------------------------------------------------------------------
>                 Key: LOG4J2-1353
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1353
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: API
>    Affects Versions: 2.5
>            Reporter: Alex Berg
>            Priority: Minor
> The Logger.warn/info/trace etc. has methods that take ... object list. It maps into message
where {} is given. If there are fewer {} than arguments in list, it ignores argument. Who
would ever desire to have an argument ignored? That is to me clearly a bug in the design,
but of cause I may be missing something.
> I suggest to always append the unmatched extra arguments and separate them by a space
or a comma. I'm not sure if the last argument is logged as an exception if it is an exception,
in that case the solution should gracefully handle that.
> A super nice feature would be if it was possible to configure the append of the unmatched
arguments, but I think that is more work than it is worth.
> see http://logging.apache.org/log4j/2.x/log4j-api/apidocs/index.html

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