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https://issues.apache.org/jira/browse/LOG4J2-573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941833#comment-13941833
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Ralph Goers commented on LOG4J2-573:
------------------------------------

Is  May 1, 2014 12:45 more specific than May 1?  It seems obvious to me that in 
the first the most specific time unit is minutes while in the second it is a 
day.

This enhancement introduces another complexity. Currently when the time-based 
pattern is present the increment is reset to 0 when the rollover occurs due to 
time.  It only increments on a size based rollover.  So without the file 
pattern every rollover would try to write to file 0.   So you are asking for 
two enhancements in this request.

> TimeBasedTriggeringPolicy does not accept %i increment FilePattern
> ------------------------------------------------------------------
>
>                 Key: LOG4J2-573
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-573
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: Appenders
>    Affects Versions: 2.0-rc1
>            Reporter: Steven McCoy
>            Priority: Minor
>
> The following configuration should be valid but raises an exception because 
> the filePattern contains no date however it does contain an increment pattern.
> {code:xml}
>     <RollingRandomAccessFile name="File" fileName="${filename}"
>         filePattern="logs/icap.log-%i">
>       <PatternLayout pattern="%m%n"/>
>       <Policies>
>         <OnStartupTriggeringPolicy />
>         <TimeBasedTriggeringPolicy interval="12" modulate="true"/>
>         <SizeBasedTriggeringPolicy size="500 MB"/>
>       </Policies>
>       <DefaultRolloverStrategy fileIndex="min" max="3"/>
>     </RollingRandomAccessFile>
> {code}



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