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From "Juan Loman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1185) Ability to change the fileName dynamically in RollingFileAppender
Date Tue, 11 Apr 2017 19:05:41 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15964822#comment-15964822
] 

Juan Loman commented on LOG4J2-1185:
------------------------------------

I haven't been able to make this work in 2.8.2 (latest release as of this comment).  Which
kind of pattern should be used in the `fileName` property?

I've tried with:

{code}
fileName="logs/current.$\{date:yyyy-MM-dd-HH-mm\}.log"
{/code} asdf

This should be described briefly in the official documentation.

> Ability to change the fileName dynamically in RollingFileAppender
> -----------------------------------------------------------------
>
>                 Key: LOG4J2-1185
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1185
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Appenders
>    Affects Versions: 2.1
>            Reporter: Dhwaneet Bhatt
>            Assignee: Ralph Goers
>             Fix For: 2.8
>
>
> Right now RollingFileAppender rolls over the current file with fileName to the one generated
by FilePattern. However, logging always continues in the same fileName i.e. fileName once
created cannot be changed.
> Property Substitution is only once during initialization, fileName is never changed after
RollingFileManager is initialized. The RollingFileManager is very tightly tied up to the fileName
attribute.
> Consider that I want to name my log files like this using RollingFileAppender:
> mylog-2015-10-30.log
> mylog-2015-10-29.log
> mylog-2015-10-28.log
> There is no good way to achieve this, because even after rolling over the file, the fileName
would still remain the same. If I initialized my fileName using $\{date:yyyy-MM-dd\}, date
would be substituted only once during initialization and it would never change, always continue
to log in the same log file (until I restart my application).



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