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https://issues.apache.org/jira/browse/LOG4J2-2331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461140#comment-16461140
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ASF subversion and git services commented on LOG4J2-2331:
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Commit ede615ce054d71ba3c2c252b416dada441ed42ea in logging-log4j2's branch
refs/heads/release-2.x from [~mbaranski]
[ https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;h=ede615c ]
[LOG4J2-2331] use logger string formatting instead of concatenation
RollingFileManager debug logging avoids string concatenation and
errant braces in favor of parameterized logging.
> Rolling file appender concatenating debug message instead of using formatting
> -----------------------------------------------------------------------------
>
> Key: LOG4J2-2331
> URL: https://issues.apache.org/jira/browse/LOG4J2-2331
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.11.0
> Environment: Any - Mac with log4j 2.11.0 using `-Dlog4j.debug` and a
> RollingFileAppender
> Reporter: Michael Wells Baranski
> Assignee: Carter Kozak
> Priority: Minor
> Labels: easyfix
> Fix For: 3.0.0, 2.11.1
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When debug is on, RollingFileAppender prints the shutdown message and
> concatenates the name, instead of passing it as an argument to be formatted:
> `"Shutting down RollingFileManager {}" + getName()`
> should be:
> `"Shutting down RollingFileManager {}", getName()`
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