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From "Setu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LOG4J2-921) Allow to log some important information at the start of each new roll over log file when using RollingFile Appender
Date Mon, 15 Dec 2014 10:33:13 GMT
Setu created LOG4J2-921:
---------------------------

             Summary: Allow to log some important information at the start of each new roll
over log file when using RollingFile Appender
                 Key: LOG4J2-921
                 URL: https://issues.apache.org/jira/browse/LOG4J2-921
             Project: Log4j 2
          Issue Type: Improvement
          Components: Appenders
    Affects Versions: 2.1
            Reporter: Setu


if someone wants to log some important information at the start of each roll over log file
there is no mechanism present in current version. The header attribute in PatternLayout barely
does the job because it logs the header at the start of each system startup. 

Example: There is a requirement to log some system properties (or any other details, environment
details, etc) at the each roll over so that it becomes easy to determine on which environment
the software is running. When tried to use header attribute on a software that continuously
runs on server it did not work as expected instead the header was logged whenever the server
got restarted. 

Also how can they key supplied in header attribute be logged with line breaks. 
Example: when using header="${java:runtime} - ${java:vm} - ${java:os}" it prints all the information
in same line which makes it unreadable if someone wants more details. 

Implementing a custom lookup did not help either as all it did was kept logging the custom
lookup key in header attribute at each system restart instead of at the start of new rollover
file. 



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